Pipistrel Virus 912 S-LSA Glider Operating Instructions Manual

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SERIAL NUMBER: 0359

REGISTRATION: N66PV

4/25/2011

AIRCRAFT OPERATING INSTRUCTIONS

Pipistrel Virus 912 S-LSA Glider

PIPISTREL LSA s.r.l. Via Aquileia 75 34170 Gorizia, Italy, EU

AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

TABLE OF CONTENTS PG

1. Purpose: 5

2. General Information: 5

2.1 Read this before your first flight! 5

2.2 Manufacturer. 5

2.3 Warnings, cautions, and notes. 5

2.4 Revision tracking, filing, and identifying. 6

2.5 Online updates, service notice tracking. 6

2.6 Schematics of Virus 212 S-LSA Glider. 8

3. Aircraft and Systems Descriptions: 9

3.1 Operating weights and loading (occupants, baggage, fuel, ballast). 9

3.2 Propeller. 10

3.3 Fuel and fuel capacity. 10

3.4 Oil. 10

3.5 Engine. 10

4. Operating Limitations: 11

4.1 Stalling speeds at maximum takeoff weight (VS, VS0, and VS1). 11

4.2 Flap extended speed range (VS0 to VFE). 11

4.3 Maximum maneuvering speed (VA). 11

4.4 Never exceed speed (VNE). 11

4.5 Maximum aerotow speed (VT). 11

4.6 Maximum winch tow speed (VW). 11

4.7 Maximum landing gear extended operating speed (VLO). 11

4.8 Never exceed speed (VNE). 11

4.9 Crosswind and wind limitations for takeoff and landing. 11

4.10 Load factors. 11

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

4.11 Prohibited maneuvers. 11

5. Weight and Balance Information: 12

5.1 Installed equipment list. 12

5.2 Center of gravity (CG) range and determination. 13

6. Performance: 14

6.1 Gliders: 14

6.1.1 Crosswind and wind limitations for takeoff and landing. 14

6.2 Powered Gliders: 14

6.2.1 Takeoff distances. 14

6.2.2 Rate of climb. 14

6.2.3 Climbing speeds. 14

6.2.4 Maximum RPM. 14

6.2.5 Time limit for the use of takeoff power. 14

6.2.6 Fuel consumption and total usable fuel volume. 14

6.2.7 Crosswind and wind limitations for takeoff and landing. 14

6.2.8 Speeds for extracting and retracting powerplant. 14

7. Emergency Procedures: 15

7.1 Engine Failure: 15

7.1.1 Engine failure during takeoff run. 15

7.1.2 Engine failure immediately after takeoff. 15

7.1.3 Engine failure in flight (forced landing). 15

7.2 In-flight start. 16

7.3 Smoke and Fire: 16

7.3.1 Fire on the ground. 16

7.3.2 Fire during takeoff. 16

7.3.3 Fire in flight. 16

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

7.3.4 Smoke in Cockpit. 17

7.4 Landing emergencies: 17

7.4.1 Emergency landing (landing out). 17

7.4.2 Precautionary landing. 17

7.4.3 Landing with a flat tire. 17

7.4.4 Landing with defective landing gear. 17

7.4.5 Water landing (ditching). 18

7.5 Spin Recovery. 18

7.6 Other Emergencies. 18

7.6.1 Stall Recovery. 18

7.6.2 Vibration. 18

7.6.3 Carburetor icing. 19

7.6.4 Icing, pneumatic instrument failure. 19

7.6.5 Bird strike. 19

7.6.6 Structural failure. 19

7.6.7 Electric failure. 19

7.6.8 Use of GRS whole plane rescue system. 20

8. Normal Procedures: 20

8.1 Preflight check. 20

8.2 Powered glider normal procedures: 27

8.2.1 Ground engine starting. 27

8.2.2 Taxiing. 28

8.2.3 Normal takeoff. 29

8.2.4 Engine extraction and retraction. 31

8.2.5 Best rate of climb speed (VY). 31

8.2.6 In-flight starting of engine. 31

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

8.2.7 In-flight shutdown of engine. 31

8.2.8 Ground shutdown of engine. 32

8.3 Cruise. 32

8.4 Approach 32

8.5 Normal landing. 33

8.6 Information on stalls, spins, and any other useful pilot information. 34

9. Aircraft Ground Handling and Servicing: 38

9.1 Servicing fuel, oil, and coolant. 38

9.2 Towing and tie-down instructions. 39

10. Required Placards and Markings: 42

10.1 Airspeed indicator range markings. 42

10.2 Operating limitations on instrument panel, if applicable. 42

10.3 Passenger Warning—“This aircraft was manufactured in accordance 42 with Light Sport Aircraft airworthiness standards and does not conform to standard category airworthiness requirements.”

10.4 “NO INTENTIONAL SPINS,” if applicable. 42

10.5 Empty weight. 42

10.6 Maximum takeoff weight. 42

10.7 Maximum and minimum weight of crew. 43

10.8 Seat for solo operations of two seated gliders. 43

10.9 Allowable baggage weight. 43

10.10 Placards. 44

11. Supplementary Information: 45

11.1 Familiarization flight procedures. 45

11.2 Pilot operating advisories. 47

12 Maintenance Manual—Maintenance manuals containing routine, inspection, and repair maintenance procedures for the aircraft, engine, and propeller, are provided under separate cover.

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

1. PURPOSE. To provide a standard instruction for the safe and efficient use of this Pipistrel Aircraft. By combining a comprehensive instruction which describes Systems, Performance, Procedures, and Limitations, this Instruction will provide the owner/pilot with the knowledge required to safely share the passion of flight for many years.

This aircraft was built In accordance with the specifications of ASTMs F 2564, 2279, 2295, 2316, and 2483. Additionally, we have used a power plant which complies with ASTM F 2339. Every Pipistrel LSA Glider is accompanied by an Aircraft Operating Instruction (AOI). The content and format herewith is defined by F 2564. Additions to F 2564 standards format are included wherever necessary to adequately describe the safe operation of the aircraft. All flight speeds are given in terms of calibrated airspeeds (CAS), unless otherwise noted. All specifications and limitations are determined from the specification F 2564. Capacities, Dimensions, and Performance Measures are framed in terms commonly used in the American Market. Although US temperatures are normally measured in degrees Fahrenheit, this instruction will use degrees Centigrade, now commonly used in the US, to avoid confusion with instruments that display temperatures in degrees Celsius/Centigrade.

2. GENERAL INFORMATION.

2.1 Read this before your first flight! Every pilot must understand the capabilities and

limitations of this light sport glider. The AOI must be read thoroughly. Pay attention to the preflight and daily checks. Maintenance instructions for the aircraft are given in a separate Maintenance Manual. For maintenance of the Rotax® engine, emergency parachute system and other installed equipment refer to the original manufacturer´s manuals. Flying the Virus, like any other motor glider, must include planning for a safe landing due to the possible loss of the engine power at any time.

This Pipistrel Virus is designed for and capable of day and night VFR flight. Because of its cruising speed and range, flight into vastly different weather patterns and meteorological conditions can occur. The entry into bad weather with IFR conditions with VFR aircraft is extremely dangerous. As the owner or operator of an aircraft you are responsible for the safety of your passenger and yourself. Do not attempt to operate your Virus in any manner that would endanger the aircraft, the occupants, or persons on ground.

2.2 Manufacturer.

PIPISTREL LSA s.r.l. Via Aquileia 75 34170 Gorizia, Italy, EU

2.3 Warnings, Cautions, and Notes.

 WARNING!

Disregarding the following instructions leads to severe deterioration of flight safety and hazardous situations, including such resulting in injury and loss of life.

 CAUTION!

Disregarding the following instructions leads to serious deterioration of flight safety.

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Designation

Reason for Revision

Release date

Affected pages

Issuer

Original

25 October, 2010

Tomazic, Pipistrel LSA s.r.l.

 NOTE:

An operating procedure, technique, etc., which is considered essential to emphasize.

2.4 Revision tracking, filing, and identifying. Pages to be removed or replaced in the Aircraft Operating Instructions are determined by the Log of Effective pages located in this section. This log contains the page number and revision level for each page within the AOI. As revisions to the AOI occur, the revision level on the effected pages is updated. When two pages display the same page number, the page with the latest revision shall be used in the AOI. The revision level on the Log Of Effective Pages shall also agree with the revision level of the page in question. Alternative to removing and/or replacing individual pages, the owner can also print out a whole new manual in its current form, which is always available from www.pipistrel.eu. Revised material is marked with a vertical double-bar that will extend the full length of deleted, new, or revised text added to new or previously existing pages. This marker will be located adjacent to the applicable text in the marking on the outer side of the page. The same system is in place when the header, figure, or any other element inside this AOI was revised. Next to the double-bar, there is also a number indicative to which revision the change occurred in. A list of revisions is located in section 2.5 below.

2.5 Online updates, service notice tracking. To log into the Owner’s section, receive relevant updates and information relevant to Service/Airworthiness, go to: www.pipistrel.eu and log in the top right corner of the page with:

Username: owner1 Password: ab2008

Index of revisions

The table below indicated the Revisions, which were made from the original release to this date. Always check with your registration authority, Pipistrel USA (www.pipistrel-usa.com) or Pipistrel LSA s.r.l (www.pipistrel.eu) that you are familiar with the current release of the operationrelevant documentation, which includes this POH.

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

13.4 ” 46.1 ” 43.1 ” 71.7 ” 22.4” 63.4 ”

43.3 ” 39.4 ” 9 ‘ 1.5 ”

18 ’ 9.6 ”

11 ‘ 0.7 ”

24.8”

36.2 ”

60 ”

43.3”

21’ 3.7”

64.6”

44.5”

68.6”

40’ 10.6”

10.4”

10’ 6.4”

29.1”

2.6 Schematics of Virus 912 S-LSA Glider. (dimensions in feet or inches)

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

empty weight

702.5 lbs (319.3 kg)

max. takeoff weight (MTOM)

1210 lbs (550 kg)

fuel capacity (full)

2 x 13 gal = 26 US gal (100 L)

fuel capacity (usable)

24.5 US gal (93 L)

max. fuel weight allowable

167 lbs (76 kg)

maximum useful load

508 lbs (231.1 kg)

minimum combined cockpit crew weight

119 lbs (54 kg)

maximum combined cockpit crew weight

519 lbs (227.3 kg)

luggage weight

55 lbs (25 kg) (80 lbs (40 kg) if GRS is removed)

3. AIRCRAFT SYSTEMS AND DESCRIPTIONS.

Pipistrel Virus S-LSA Glider is intended for recreational, sport, cross-country, and training; but it is not approved for aerobatic operation.

The Virus is a single engine, carbon, Kevlar, and glass aircraft with two side-by-side seats. It is equipped with a tricycle gear undercarriage with a steerable nose wheel and toe brakes. The fuselage is a carbon shell with carbon/Kevlar seats integrated. The wing is a mono-spar construction with a sandwich skin composed of two layers of fiberglass with a foam core. Control surfaces are of the same construction.

The aircraft is controlled by a dual push-pull control system. The ailerons and elevator are controlled by the control sticks located between the pilot's and co-pilot’s legs. The rudder is controlled by the rudder pedals, flaps and spoilers are operated by control levers located between the pilots.

3.1 Operating weights and loading SN: 359.

WARNING! Should any of the above-listed values be exceeded, the others MUST be reduced in order to

keep MTOM below 1210 lbs (550 kg). Pay special attention to luggage weight as this is the only applicable

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

3.2 Propeller. The Propeller, made by Pipistrel, is a fixed pitch, auto-feathering, two bladed design, which is optimized for safe and efficient operation of your Pipistrel Touring (Self Launch) Motor Glider. See Maintenance Manual for inspection, adjustment, and servicing instructions.

3.3 Fuel and fuel capacity. Automotive Unleaded per ASTM D 4814, minimum octane 89 fuel may be used if it does not contain ethanol or special additives. 100LL may also be used. For questions about additives, see Rotax Operators Manual.

Fuel is contained in two, extended range tanks, each with 13 gallon capacity (total 26 gallons) of which 24.5 gallons useable.

Recommended fuel unleaded super, 89 octane, without ethanol or additives

Also approved fuel leaded or AVGAS 100LL*

* Use of leaded or even low-lead fuels may reduce engine life and oil and oil filter changes at least every 50 hours becomes crucial for proper care of your engine.

WARNING! Use of fuel with alcohol content and/or other additives is not permitted.

3.4 Oil. API SJ SAE, 10W-50. Rotax 912 engine oil capacity is 3 quarts. For suitable oil types refer to the

original Rotax Operator’s Manual.

3.5 Engine. Engine model: ROTAX 912 UL (80 HP) mfg: Bombardier-Rotax

Cylinder Head Temperature (CHT) oC : Minimum / Working / Highest

80 / 110 / 120 Exhaust Gas Temperature (EGT) : Normal Range / Highest

650-885 / 900

Max EGT difference

Radiator water temperature range oC : lowest / highest

50 / 120

Engine Oil Temp oC : minimum / normal range / highest

50 / 90-110 / 140

Oil Pressure psi : minimum / maximum

14.5 / 87.0

Max RPM (5 min)

5800

Max Continuous power RPM

5500

Ignition - Magneto Check RPM

4000

Max single magneto drop RPM

300

NOTE: This data is relevant for the pilot. Consult Rotax engine manual for all other engine details.

Warning! Should the engine reading be outside of these parameters: do not take off; if in the air, land as soon as possible! Always be prepared to respond to an engine failure.

mass on the airframe that can cause the center of gravity to move out of range. Exceeding baggage weight limits can shift the aircraft’s balance to the point where the flight may become uncontrollable!

NOTE: Weight and Balance information is found in paragraph 5 below.

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

4. Operating Limitations

4.1 Stall Speeds

4.2 Flap extended speed range (VSO and VFE): 36 kts – 70 kts

4.3 Maximum maneuvering speed (VA): 76 kts

4.4 Never exceed speed (VNE): 120 kts

4.5 Maximum aerotow speed (VT): N/A

4.6 Maximum winch tow speed (VW): N/A

4.7 Maximum landing gear extended operating speed (VLO): N/A

4.8 Never exceed speed computation (VNE): 120 kts

4.9 Crosswind and wind limitations for takeoff and landing: 15 kts

4.10 Load factors. Maximum positive wing loading: + 4G Maximum negative wing loading: - 2G

NOTE: These values correspond to ASTM standards for LSAs. All parts have been tested to a safety

positive G factor of 1.875, meaning they were subjected to at least a load of plus 7.5 G

4.11 Prohibited maneuvers.

 Aerobatics  Fully developed spins  Take off with less than 1.3 gallons of useable fuel  Flight with both cabin doors removed  Flight into known icing conditions  Flight into IMC

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

5. WEIGHT AND BALANCE INFORMATION.

5.1 Installed equipment list.

 Nose wheel, steerable  Long Range Fuel Tanks, 26 gallons  Large Instrument Panel  Solid Luggage Compartment  Side baggage door  Ballistic Rescue System  Airspeed Indicator  Altimeter  Dynon 180 EFIS  Garmin GTX 327 Transponder  Variometer LS 160  Oil Check door  Auto feathering propeller  Pedal mounted toe brakes pilot & copilot  Fast mount engine cover screws  Leather interior Tan and Dark Red  Wings prepared plumbed for night lighting

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

5.2 Center of gravity (CG) range and determination.

a = 40.15”

c = 60”

Wfr = 107.2 lbs

Wm = 595.3 lbs

55 lbs

max

46”

Empty Weight Wtot = 702.5 lbs

N66PV

Virus 912 S-LSA SN:

Datum leading edge of wing at root MAC 35.75 inches Length of the Line which represents the position of the wing's average (aerodyn amically) cord MAC offset 1.1 inches Forward most point of the MAC begins 1.1 inch aft of the leading edge of the wing at the root MAC fwd CG 20% design limit MAC aft CG 38% design limit Fwd CG limit 8.3 inches Calculated: (20% * 35.75 + 1.1) Aft CG limit 14.7 inches Calculated: (38% * 35.75 + 1.1) a 40.15 inches Horizontal distance from center of nosewheel to lea ding edge of wing c 60 in ches Horizontal distance from center of nosewheel to line thru center of main gear Fuel arm 4 inches Fuel wt is slightly forward of the CG range, therefore full fuel results in a for ward CG Crew arm 11.5 inches This arm puts the p ilot and pas senger on center of the CG range, so minimum crew wt resu lts in most extreme CGs Empty wt (EW) 702.5 lbs Weighed at Factory - fully configured Empty wt CG 10.7 inches

Calculated: (Wt

main gear

/ Wt

main + nose

)* c - a (595 / 702) * 60 - 40.15

Min pilot wt 119 lbs

Limited by Design - bu t I am not sure why

Max Crew wt (P) 500 lbs (MTOW limited - with min fu el on boar d) Full Fuel wt (F) 167 lbs Maximum fuel weight - 26 gal AVGAS (mogas weighs slightly less) Max Baggage (B) 55 lb s Limited by Designer Baggage Arm 46 in ches Assumes a distributed load throughout the compartment MTOW 1210 lbs Limited by Design Max Fuel Payload 341 lbs Max imum combined weight of passengers and baggage if full fuel is car ried CG X inches Measured fr om leading edge of wing at root - mus t be between 8.3" and 14.7"

(EW*10.7) +(P*11.5) +(F*4)+(B*46)

(EW + P + F + B)

Forwardmost CG = 9.66 I nches Computed with light pilot, full fu el, and no ba ggage

(there is no wa y to load the Virus with CG too far forward)

Rearmost CG = 13.02 Inches Computed with light pilot, no fuel, and 55 lbs of b aggage

(even with up to 100 lbs of baggage, the CG will remain within range)

X =

CG Formula:

EW = empty weight P = pilot & co-pilot weight F = weight of fuel on board B = weight of baggage X = CG in inches aft of datum CG Range ( 8.3” < X < 14.7” )

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

6. PERFORMANCE.

6.1 Gliders. This Virus S-LSA 912 is designed with the ability to sustain flight using lift from

natural sources, i.e., thermals, ridge, and wave lift; therefore, it is a Glider.

6.2 Powered gliders. Power can be categorized as sustainment requiring winch or tow launch, and Self-Launch which can include touring motor gliders that provide efficient cross country cruise as well as efficient thermal, ridge or wave soaring. The Virus S-LSA falls into this latter category.

6.2.1 Takeoff/Landing distances in feet: ground roll over 50’ obs

Take-off Grass 600’ 925’ Take-off Paved 500’ 825’ Landing Grass 500’ 885’ Landing Paved 500’ 885’

6.2.2 Rate of climb: 1080 fpm at Sea Level, MTOW and VY

6.2.3 Climbing speeds: VY = 70 kts; VX = 52 kts

6.2.4 Maximum RPM:

5800 rpm for not longer than 5 minutes 5800 rpm takeoff power (5 min max) 5500 maximum continuous power 5000 75% cruise power setting

6.2.5 Time limit for the use of takeoff power: 5 minutes maximum as long as all engine temperature and pressure readings stay in the green.

6.2.6 Fuel consumption and total usable fuel volume.

3.3 gph at 75% cruise power setting

24.5 gallons usable fuel

6.2.7 Crosswind and wind limitations for takeoff and landing. Maximum allowed crosswind speed on takeoff and landing with flaps is 15 kts. The runway length required is increased by 10 % for every 5 kts of crosswind component. Even if crosswind component is below 15 kts, discontinue flight should surface winds be gusty or exceed 25 kts.

6.2.8 Speeds for extracting and retracting powerplant. N/A

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

7. EMERGENCY PROCEDURES.

7.1 Engine failure

7.1.1 Engine failure during take-off run.

1. Apply Brakes

2. Pull Throttle to Idle

3. Ignition off

7.1.2 Engine failure immediately after take-off.

1. Fly the aircraft

2. Lower nose to maintain best L/D 59 kts

3. Under 100’ AGL, land straight ahead using airbrake

as required to select safest touchdown point

4. 100’-200’ AGL, consider up to 90 degree turn to best landing site.

If in doubt, choose the best off field area to your front. Use airbrake as required to pinpoint your touchdown location.

5. Over 200’ AGL, turn into the direction of crosswind

component using 45 degree bank. Use airbrake once you have the field made. Use radio to announce intentions.

6. Fuel Off

7. Ignition Off

8. Master Off

9. Land avoiding obstacles

10. If terrain and obstacles cannot be avoided. Deploy

Emergency Rescue Chute.

7.1.3 Engine failure in flight (Forced landing)

1. Fly the aircraft

2. Establish best L/D 59 kts

3. Determine if you have enough altitude to glide to nearest

airfield. If yes, consider effects of winds. If no, choose best alternative landing site.

4. Establish heading toward landing site.

5. Attempt re-start.

6. Make radio call to inform any other aircraft in the area.

7. Use airbrake as required to touch down on chosen landing

site.

8. Fuel valves Off

9. Ignition Off

10. Master Off

11. Land avoiding obstacles

12. If terrain and obstacles cannot be avoided. Deploy

Emergency Rescue Chute, over an open area if possible.

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

7.2 In-Flight start.

1. Maintain airspeed at or below 50 kts

2. Check altitude, and determine landing site if restart should fail

3. Master on

4. Fuel on

5. Choke as needed

6. Throttle closed

7. Avionics Off

8. Fuel pump on

9. Ignition on

10. Start engine

11. Fuel pump off

7.3 Smoke and fire.

7.3.1 Fire on ground.

1. Fuel valves OFF

2. Throttle full open

3. Master OFF

4. Magnetos OFF

5. Disconnect the battery from the circuit (pull battery disc. ring on the switch

column) 3b. Keep avionics ON and master ON as required, on approach set both OFF.

6. Perform emergency landing out procedure.

7. Abandon aircraft

8. Extinguish if possible or call fire department

7.3.2 Fire during take-off

1. Fuel valves OFF

2. Throttle full open

3. Master OFF

4. Magnetos OFF

5. Maintain 52-59 kts

6. Set ventilation for adequate breathing. Keep in mind that oxygen intensifies fire.

7. Perform side-slip (crab) maneuver in direction opposite the fire.

8. Ignition OFF

9. Land and brake

10. Abandon aircraft

11. Extinguish if possible or call fire department

7.3.3 Fire in Flight.

1. Fuel valves OFF

2. Throttle full open

3. Master OFF

4. Magnetos OFF

5. Maintain 52-59 kts

6. Set ventilation for adequate breathing. Keep in mind that oxygen intensifies fire.

7. Perform side-slip (crab) maneuver in direction opposite the fire.

8. Ignition OFF

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

9. Land and brake

10. Abandon aircraft

11. Extinguish if possible or call fire department

7.3.4 Smoke in Cockpit. Smoke in cockpit is usually a consequence of electrical wiring malfunction. As it is most likely caused by a short circuit, the pilot must react as follows:

1. Master switch to I (key in central position). This enables unobstructed engine

operation while at the same time disconnects all other electrical devices from the circuit. Verify that the 12 V and optional Pitot heat are OFF as well.

2. Disconnect the battery from the circuit (pull battery disconnection ring on the

instrument panel’s switch column).

3. Land as soon as possible.

WARNING! In case you have trouble breathing or the visibility out of the cockpit has

degraded severely due to the smoke, open the cabin door and leave it hanging freely. Flying with the door open, do not, under any circumstances exceed 60 kts (110 km/h).

7.4 Landing emergencies.

7.4.1 Emergency landing (landing out).

1. Select airfield if possible, if not, choose the most open area within range.

2. If hazardous terrain or weather should preclude safe landing options/locations, plan for use of GRS rescue system (see 7.6.8 below)

3. Shut both fuel valves.

4. Master switch OFF.

5. Use air brake to descend to landing point without gaining airspeed

6. Approach and land with extreme caution, maintaining normal final approach airspeed.

7. After having landed, leave the aircraft immediately and use cell phone to request assistance.

WARNING! The landing off airport maneuver MUST be performed in accordance with all

normal flight parameters/procedures.

7.4.2 Precautionary landing. Landing under power at a field of your choice is always

preferable to an Emergency landing. Some reasons to consider a precautionary landing:

1. Engine temp or pressure parameters out of range

2. Low fuel

3. Engine running rough

4. Winds or weather

5. Pilot illness or fatigue

6. You hear strange noises (or even strange voices)

7. You are lost

7.4.3 Landing with a flat tire.

7.4.4 Landing with defective landing gear.

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

7.4.5 Water landing (ditching). Should you be forced to land in a body of water, use the same emergency procedure as above for the “Emergency landing / Landing out” case. In addition, make sure to open both doors fully before hitting the water, disconnect the battery from the circuit (pull ring on electrical panel). Touch the water with the slowest possible speed, if possible in a nose-high flare attitude.

7.5 Spin recovery. Virus 912 LSA is constructed in such manner that it is difficult to be flown into a spin, and then, only at aft center of gravity loading. However, once spinning, either intentionally or unintentionally, react as follows:

1. Set throttle to idle (lever in full back position).

2. Apply full rudder deflection in the direction opposite the spin.

3. Lower the nose towards the ground to build speed (stick forward).

4. As the aircraft stops spinning neutralize rudder deflection.

5. Slowly pull up and regain horizontal flight.

NOTE: Virus 912 LSA tends to reestablish normal flight by itself usually after having spun

for a mere 45°-90°.

WARNING! Keep the control stick centered along its lateral axis (no aileron deflections

throughout the recovery phase! Do not attempt to stop the aircraft from spinning using ailerons instead of rudder!

WARNING! After having stopped spinning, recovering from the dive must be performed

using gentle stick movements (pull), rather than overstressing the aircraft. However, VNE must not be exceeded during this maneuver. When the aircraft wings are level, resume horizontal flight and add throttle to resume normal flight.

7.6 Other Emergencies.

7.6.1 Stall recovery. First reduce angle of attack by pushing the control stick forward, then

Add full power (throttle lever in full forward position) while maintaining wings level. Then resume horizontal flight while maintaining appropriate airspeed.

7.6.2 Vibration or Flutter. Flutter is defined as the oscillation of control surfaces. It is, in most cases, caused by abrupt control deflections at speeds in excess of VNE. As it occurs, the ailerons, elevator or even the whole aircraft start to vibrate violently. Should flutter occur, increase angle of attack (pull stick back) and reduce throttle immediately in order to reduce speed and increase load (damping) on the structure.

WARNING! Fluttering of ailerons or tail surfaces may cause permanent structural damage

and/or inability to control the aircraft. After having landed safely, the aircraft MUST undergo a series of check-ups performed by authorized service personnel to verify airworthiness.

Should the VNE be exceeded, whether or not associated with flutter, reduce airspeed slowly with backpressure on the stick and reducing throttle. Continue flying using gentle control deflections. Land safely as soon as possible and have the aircraft verified for airworthiness by authorized service personnel.

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

7.6.3 Carburetor Ice. First noticeable signs of carburetor icing are rough engine running and gradual loss of power. Carburetor icing may occur even at temperatures as high as 50°F (10°C) , provided the air humidity is increased. The carburetor air-intake in the Virus 912 LSA is preheated, running over the water cooling radiator before entering the carburetors. Therefore, you are unlikely to experience Carburetor icing in your Pipistrel. Should you suspect carburetor ice, descend immediately into warmer and/or less humid air! In case of complete power loss, perform emergency landing procedure.

7.6.4 Icing, pneumatic instrument failure. Maintain VFR flight!

1. Turn back or change altitude to exit icing conditions. Consider lateral or vertical

path reversal to return to last “known good” flight conditions.

2. Set cabin heating ON and Pitot heat (optional) ON.

3. Watch for signs of icing on the pitot tube.

4. In case of pneumatic instrument failures, use the GPS (optional) information to

reference to approximate ground speed.

5. Plan the landing at the nearest airport, or a suitable off airport landing site in

case of an extremely rapid ice build-up.

6. Maneuver the airplane gently and leave the wing flaps retracted. (When ice is

built up at the horizontal stabilizer, the change of pitching moment due to flaps extension may result of loss of elevator control.)

7. Approach at elevated speeds (70 kts, also if using the GPS as a reference).

WARNING! Failure to act quickly may result in an unrecoverable icing encounter.

7.6.5 Bird strike. Reduce speed, land at nearest airfield to assess damage. If prop may be

damaged, reduce throttle to idle and prepare for emergency landing. Decide to use GRS chute if aircraft cannot be controlled to a safe landing site.

7.6.6 Structural failure. Structural damage to an aircraft may be caused by several factors:

 Collision with another aircraft, or a bird  Flutter  Over stressing – either positive or negative g’s  Control surface failure due to improper inspection or maintenance

Regardless of cause, check airspeed, assess controllability and land immediately if you are able to control the aircraft. If aircraft is uncontrollable, deploy GRS rescue chute (see 7.6.8 below).

WARNING! At low altitude, there may not be time to fully assess your situation. In this

case when there is no place to land straight ahead, pull activation handle for GRS rescue system.

7.6.7 Electrical Failure. The engine will continue to function due to the onboard alternator and battery. In case of battery failure, be aware that the engine can keep running, however a re-start will not be possible. In event of alternator failure, the battery will support the onboard avionics. In event of double power source failure, use analogue on-board instruments and land normally.

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

7.6.8 Deployment of GRS rescue system.

System description

The GRS rocket charged parachute rescue system provides you with a chance to rescue yourself from an unexpected situation. The system is placed inside a durable cylinder mounted on the right hand side of the baggage compartment. Inside this cylinder is the parachute which stored inside a deployment bag with a rocket engine underneath. This brand new design deploys a canopy that is not gradually drawn from the container, exposed to distortion by air currents, but it is safely open after 0,4 to 0,7 seconds in distance of 15-18 meters above the aircraft. It is carried there in a special deployment bag, which decreases the risk of aircraft debris fouling the canopy. The parachute rescue system is activated manually, by pulling the activation handle mounted on the back wall above. After being fired, the man canopy is open and fully inflated in about 3.2 seconds.

WARNING! Activation handle safety pin should be inserted when the aircraft is parked or

hangared to prevent accidental deployment. However, the instant pilot boards the aircraft, safety pin MUST be removed!

Use of parachute rescue system Typical situations for use of the parachute rescue system are:

 structural failure  mid-air collision  loss of control over aircraft  engine failure over hostile terrain  pilot incapacitation (incl. heart attack, stroke, temp. blindness, disorientation...)

Prior to firing the system, provided time allows:

1. shut down the engine and set master switch to OFF (key in full left position)

2. shut both fuel valves

3. fasten safety harnesses tightly

4. protect your face and body.

To deploy the parachute jerk the activation handle hard to a length of at least 1 foot towards the instrument panel.

Once you have pulled the handle and the rocket is deployed, it will be about two seconds before you feel the impact produced by two forces. The first force is produced by a stretching of the system risers. The second force follows from the inflation of the canopy. It will seem to you that the aircraft is pulled backwards briefly. The airspeed is reduced to zero, and the aircraft now starts to descend underneath the canopy. As the pilot, this is likely a new experience, and you should know that the phase following parachute deployment will be a great adventure for the crew. You will be in a situation for the first time, where a proper landing and the determination of the landing site are out of your control.

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

CAUTION! Should you end up in power lines (carrying electrical current), DO NOT under

any circumstances touch any metal parts inside or outside the cockpit. This also applies to anyone attempting to help or rescue you. Be aware that anyone touching any part of the aircraft while standing on the ground will probably suffer major injury or death from electrocution. Therefore, you are strongly encouraged to confine your movements until qualified rescue personnel arrive at the site to assist you.

After the parachute rescue system has been used or if you suspect any possible damage to the system, do not hesitate and immediately contact the manufacturer!

Handling and maintenance

Prior to every flight all visible parts of the system must be checked for proper condition. Special attention should be paid to corrosion on the activation handle inside the cockpit. Also, main fastening straps on the outside of the fuselage must be undamaged at all times. Furthermore, neither system, nor any of its parts should be exposed to moisture, vibration and UV radiation for long periods of time to ensure proper system operation and life.

CAUTION! It is strongly recommenced to thoroughly inspect and grease the activation

handle, preferably using silicon spray, every 50 flight hours. All major repairs and damage repairs MUST be done by the manufacturer or authorized service personnel. For all details concerning the GRS rescue system, please see the “GRS - Galaxy Rescue System Manual for Assembly and Use”.

8. NORMAL PROCEDURES.

8.1 Pre-Flight Inspection.

WARNING! Every single inspection mentioned in this chapter must be performed prior to EVERY

FLIGHT, regardless of when the previous flight took place!

The person responsible for the preflight inspection is the pilot, who is required to perform the check-up in the utmost thorough and precise manner. Provided the status of any of the parts and/or operations does not comply with conditions stated in this chapter, the damage MUST be repaired prior to engine start-up. Disobeying this instruction may result in serious further damage to the plane and crew, including injury and loss of life!

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

Engine, engine cover

Right wing - trailing edge

Hor. tail surfaces (left)

Gascolator

Right air brake

Fuselage, continued (left)

Spinner, Nose wheel

Fuselage (RH side)

Fuselage (LH side)

Propeller

Fuselage, continued (right)

Left air brake

Undercarriage, RH wheel

Hor. tail surfaces (right)

Left wing - trailing edge

Right wing - leading edge

Vert. tail surfaces (right)

Left wingtip, lights

Right wingtip, lights

Vert. tail surfaces (left)

Left wing - leading edge

Undercarriage, LH wheel

Schematic of preflight inspection

Engine, engine cover

 Cooling fluid level: half way to the top  Oil quantity: within designated limits  Throttle, choke and oil pump wires: no mechanical damage, smooth and unobstructed

movement

 Radiators and hoses: no mechanical damage and/or leakage, air filters clean and

intact

 Exhaust pipes and muffler: firmly in position, no cracks, springs intact and in

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 Fuel and/or oil leakage: no fluid on hoses, engine housing or engine cover  Reduction gearbox: check for eventual oil leakage, all bolts and plugs attached firmly  Fasteners and engine cover screws: tightened, engine cover undamaged

Gascolator

 Drain approximately 1 cup of fuel and check for contamination.

AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

position, rubber dumpers intact

Spinner

 Prop: no mechanical damage (e.g. cracks, impact spots), screws tight bolts and nuts:

secured

 Nose wheel: grab aircraft’s propeller and push it towards the ground to verify proper

nose wheel suspension operation.

 Then lift the nose wheel off the ground and check for nose leg strut free play.  Bolts: fastened Tire: no cracks, adequate pressure Wheel fairing: undamaged, firmly

attached, clean (e.g. no mud or grass on the inside)

Propeller

 Hub and blades: no mechanical damage (e.g. cracks), both immaculately clean  Bolts and nuts: secured  Auto-feathering mechanism (optional):  smooth travel of propeller pitch, adequate spring tension

Undercarriage, wheels

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

 Bolts: fastened  Landing gear strut: no mechanical damage (e.g. cracks), clean  Wheel: no mechanical damage (e.g. cracks), clean  Wheel axle and nut: fastened  Oil line (hydraulic brakes): no mechanical damage and/or leakage  Tire: no cracks, adequate pressure  Wheel fairing: undamaged, firmly attached, clean (e.g. no mud or grass on the inside)

Wings’ leading edge

 Surface condition: pristine, no cracks, impact spots, no paint and/or edge separations  Pitot tube: firmly attached, no mechanical damage or bending. Remove protection cover

and make sure it is not blocked or full of water.

 Wing drain holes: make sure they are not blocked and clean accordingly.

Wingtip, lights

 Surface condition: pristine, no cracks, impact spots or bumps, no paint separations

Wings’ trailing edge

 Surface condition: pristine, no cracks, impact spots, no paint and/or edge separations

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

 Mylar sealing tape between wing and aileron: undamaged and in position  Aileron: pristine surface, no cracks and/or impact spots, no paint abnormalities and edge

separations, no vertical or horizontal free play, smooth and unobstructed deflections

Airbrakes, fuel reservoir cap

 Air brakes: firm, smooth, equal and unobstructed extension, tightly fitted when

retracted, springs stiff and intact.

 Fuel reservoir cap: fastened. Make sure the vent pipe is completely clean.

Fuselage, antenna, rescue parachute cover

 Self-adhesive tape: in position, no separations  Controls’ cap, antenna: firmly attached. Station  17 - optional side access door to the cargo compartment: closed and locked

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

Fuselage, continued

 Surface condition: pristine, no cracks, impact spots or bumps, no paint separations

Horizontal tail surfaces

 Surface condition: pristine, no cracks, impact spots or bumps, no paint and/or edge

separations

 Hinges: no free play in any direction  Central securing screw on top of the horizontal stabilizer: fastened and secured  Self-adhesive tape covering the gap between horizontal and vertical tail surfaces: in

position

 Elevator: smooth and unobstructed up-down movement, no side-to-side free play

Vertical tail surfaces

 Vertical fin bottom part: no cracks, impact spots or paint separations along main chord  Surface condition: pristine, no cracks, impact spots or bumps, no paint separations  Hinges: no free play in any direction  Rudder cable endings: intact, bolts in position

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

CAUTION! Preflight inspection should be performed by completing all stations 1 through 22!

8.2 Powered Glider Normal Procedures. To enter the cabin, first lift the door all the way to the bottom wing surface. The silver knob will grab and secure the door in position. Sit on the cabin’s edge and support your body by placing hands onto this same cabin edge. Drag yourself into the seat lifting first only one leg over the stick for best position. Upon assuming a comfortable seating position, check rudder pedals’ position to suit your size and needs. To lower the door DO NOT attempt to grab and pull door’s handle but gently pull the silver knob instead. To close the door securely, rotate the handle so that it locks and verify that all three closing points are secured. Fasten the safety harnesses according to your size. Adjust the rudder pedals according to your required legroom. The aircraft is equipped with in-flight adjustable rudder pedals, which adjust as follows: Sit inside the cockpit and release the pressure off the pedals. Pull the black knob in front of the control stick to bring the pedals closer to you. To move the pedals further away, first release the pressure of the pedals, then pull on the knob slightly (this will release the lock in the mechanism). Now push the pedals forward using with your feet, while keeping the black adjustment knob in your hand.

WARNING! The safety harness must hold you in your seat securely. This is especially important when

flying in rough air, as otherwise you may bump into the tubes and/or spars overhead. Make sure you tighten the bottom straps first, then the shoulder straps

8.2.1 Ground Engine Starting.

Before engine start-up

CAUTION! To ensure proper and safe use of aircraft it is essential for one to familiarize yourself

with engine’s limitations and engine manufacturer’s safety warnings. Before engine start-up make sure the area in front of the aircraft is clear. It is recommended to start-up the engine with aircraft’s nose pointing against the wind.

Make sure the fuel quantity is sufficient for the planned flight duration. Make sure the pitot tube is uncovered and rescue parachute safety pin removed. Engage wheel brakes. If equipped with the parking brake, engage parking brake.

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

Engine start-up

CAUTION! When the engine is very cold, the engine may refuse to start. Should this occur, move

the choke handle fully backwards and hold it there for some 20 seconds to make mixture richer. Engine warm-up procedure

The engine should be warmed-up at 2500 RPM up to the point working temperature is reached. Warming-up the engine you should:1 Point aircraft’s nose into the wind.2 Verify the engine temperature ranges within operational limits.

CAUTION! Avoid engine warm-up at idle throttle as this causes the spark plugs to turn dirty and

the engine to overheat.

With wheel brakes engaged and control stick in full back position, first set engine power to 4000 RPM in order to perform the ignition check. Set the ignition switches OFF and back ON one by one to verify RPM drop of not more than 300 RPM. When the ignition check has been completed, add full power (throttle lever full forward) and monitor engine’s RPM. Make sure they range between maximum recommended and maximum allowable RPM limits.

Note that engine does not reach 5800 RPM on ground. Engines are factory set to reach maximum ground RPM of 5300 - 5500 at sea level at 68° F. Maximum ground RPM may vary depending on the season and service elevation.

CAUTION! Should engine’s RPM be lower than the recommended on ground amount (min. 5100

RPM) or in excess of maximum allowable RPM on ground (5800) during this maneuver, check engine and wiring for correct installation.

8.2.2 Taxiing.

Release parking brake. Taxing technique does not differ from other aircraft equipped with a steerable nose wheel. Prior to taxiing it is essential to check wheel brakes for proper braking action. Should you expect to taxi a long way, take engine warm-up time into account and begin taxiing immediately after engine start-up. Warm-up the engine during taxiing so as not to cause the engine to overheat, as prolonged ground operation are likely to do on warm days.

Holding point - Make sure the temperatures at full power range are within operational limits. Make sure the safety harnesses are fastened and doors closed and secured at all three closing points. Set flaps to 2nd position (flap handle full up). Power to idle.

CAUTION! Should the engine start to overheat because of long taxi and holding, shut down the

engine and wait for the engine temperatures drop to reasonable values. If possible, point the aircraft’s nose into the wind. This will provide radiators with airflow to cool down the engine faster.

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

8.2.3 Normal Takeoff.

Before lining up, verify the following: Parking brake (if applicable): disengaged (full forward). Air brakes (if applicable): retracted and secured. Fuel valves: fully open. Fuel quantity: sufficient. Safety harnesses: fastened. Cabin doors: closed securely Trim handle: in neutral position or slightly forward. Flap handle: 2nd position (flap handle full up) Runway: clear - Release brakes, line up and apply full power. Verify engine for sufficient RPM at full throttle (min 5100 RPM).

CAUTION! Keep adding power gradually.

WARNING! Should engine RPM not reach more than 5000 RPM when at full throttle, ABORT

TAKE-OFF IMMEDIATELY, come to a standstill and verify that the propeller is at minimum pitch setting .

Start the takeoff roll pulling the control stick one third backward and lift the nose wheel off the ground as you accelerate. Reaching 40-43 kts, gently pull on the stick to get the aircraft airborne.

CAUTION! Crosswind (max 15 kts) takeoff should be performed with the control stick pointed

into the wind. Special attention should be paid to maintaining runway heading!

Initial climb

When airborne, engage brakes momentarily to prevent in-flight wheel spinning. Accelerate at full power and later maintain proper climbing speed. As you reach 50 kts (90 km/h) at above 150 ft (50 m), set flaps to 1st stage, reaching 60 kts (110 km/h) at 300 ft (100 m) set flaps to neutral position. Reduce RPM by 10% or below 5500 RPM and continue climbing at 70 kts (130 km/h). Adjust the trim to neutralize the stick force if necessary. Remember to keep the temperatures and RPM within operational limits during climb out.

CAUTION! Reduce power and lower the nose to increase speed in order to cool the engine down

if necessary.

Should you be climbing for a cross-country flight, consider climbing at 100 kts (185 km/h) as this will greatly increase your overall travelling speed. Reaching cruise altitude, establish horizontal flight and set engine power to cruise (5300 RPM).

Cruise

When horizontal flight has been established, verify on-board fuel quantity again. Keep the aircraft balanced while maintaining desired flight parameters. Should you desire to cruise at low speed (up to 80 kts (150 km/h)), set flaps to neutral position other-wise flaps should be set to negative position (flap handle full down).

Check engine operation and flight parameters regularly! Recommended cruise is at 5300 RPM, with a fuel burn of 3.3 US gal per hour.

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

CAUTION! It is not recommended to fly the aircraft at speeds exceeding 80 kts (150 km/h) using

flap setting other than negative.

CAUTION! Check fuel upon establishment of cruise attitude. Because of the fuel system design,

the fuel tends to gradually cross-flow from the right tank to the left. To prevent this, shut the right fuel valve and open it again when the fuel level inside left tank has lowered.

CAUTION! If the fuel quantity in a fuel tank is low, it is possible that the engine starts to suck air

into the fuel system. To prevent this and consequent engine failure, always close the fuel valve of the tank where the fuel quantity is very low.

Cruising in rough conditions. Should you experience turbulence, reduce airspeed to VA, 76 kts, and continue flying with flaps set to neutral position.

CAUTION! In rough air, reduce engine power if necessary to keep airspeed below VA.

Descent and final approach

Descend at speeds at or below VA and flaps in negative stage. To expedite descents, use airbrakes (if applicable) and keep airspeed below VAE. For approach, reduce speed to 70 kts (130 km/h) and set flaps to 1st position only after turning to base leg. Adjust engine power to maintain proper airspeed. Set trim to neutralize stick force if necessary. During the descent monitor temperatures and keep within operational limits.

CAUTION! During the descent, engine power MUST be reduced. Should you be forced to

descend at idle power, make sure you keep adding throttle for short periods of time, this will help to keep spark plugs clean.

CAUTION! With flaps in 2nd position, no more than half of the available aileron deflection is

permitted.

On final, set flaps to 2nd position. Align with the runway and reduce power to idle. Extend airbrakes (as required) and maintain an airspeed of 55 kts (102 km/h). Instead of throttle use airbrakes to control your descent glide path. Otherwise, control your attitude and crab or slip as necessary.

CAUTION! Crosswind landings require higher final approach speeds to ensure aircraft’s safe

maneuverability. Increase the approach speed by 1 kts for every 1 kts of crosswind component e.g. in case of 5 kts crosswind component, increase the approach speed by 5 kts.

Roundout and touchdown

CAUTION! See chapter “Performance” for landing performance.

Roundout and touchdown (flare) occurs at following airspeeds:

CAUTION! Land the aircraft in such a manner that the two main wheels touch the ground first,

allow the nose-wheel touchdown only after speed has been reduced below 25 kts. When lowering the nose wheel to the runway, rudder MUST NOT be deflected in any direction (rudder pedals centered).

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When on ground, start braking action holding the control stick in full back position. Steer the aircraft using brakes and rudder only. Provided the runway length is sufficient, come to a complete standstill without engaging the brakes holding the control stick slightly backwards as you decelerate.

WARNING! After touchdown, DO NOT retract airbrakes immediately, as this causes sudden lift

increase and the aircraft may rebound off the ground. Should this occur, hold the elevator

steady; under no circumstances attempt to follow aircraft’s movement with elevator movements,

for Virus 912 LSA tends to stabilize rebounding by itself. However, it is important to maintain runway heading using the rudder at all times. Retract air brakes only after the aircraft has come to a complete standstill.

CAUTION! Should you be performing the touch-and-go maneuver, retract air brakes care-fully

before re-applying full power.

Crosswind approach and roundout

CAUTION! Crosswinds prolong landing runway length due to elevated airspeed that should be

used, see previous page.

Performing a crosswind landing, the wing-low method should be used. When using the wing-low method it is necessary to gradually increase the deflection of the rudder and aileron to maintain the proper amount of drift correction.

WARNING! If the crab method of drift correction has been used throughout the final approach

and roundout, the crab must be recovered the before touchdown by applying rudder to align the aircraft’s longitudinal axis with its direction of movement.

8.2.4 Engine extraction and retraction. N/A

8.2.5 Best Rate of Climb Speed. VY = 70 kts; VX = 52 kts. Speeds greater than 70 kts may be preferable on warm days as rate of climb remains strong at speeds beyond 90 kts.

8.2.6 In-Flight Starting the Engine. V

is the Maximum velocity for engine restart in

flight 50 kts. This is applicable only for the auto-feathering propeller version! Do not restart the engine in flight beyond this speed.

NOTE: This procedure applies only for stopping and restarting the engine following an intentional unpowered flight. Reduce speed to 50 kts or below. Apply normal engine shut down or start-up procedure. Upon restart, should the engine cool down during unpowered flight, apply choke. Always start the engine at idle throttle.

CAUTION! Do not add full power while the engine is still cool. Fly at lower airspeeds at low power

engine setting to warm it up instead (e.g. 50 kts (90 km/h) at 3000 RPM).

8.2.7 In Flight Shutdown of Engine. This procedure applies only for stopping and restarting the engine following an intentional unpowered flight. Reduce speed to 50 kts or

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

below. Apply normal engine shut down or start-up procedure. Upon restart, should the engine cool down during unpowered flight, apply choke. Always start the engine at idle throttle.

8.2.8 Ground Shutdown.

1. Engine speed - idling

2. Instruments - engine instruments within limits

3. COMM + intercom - off

4. Ignition key - off

5. Circuit breakers - off

6. Master switch - off

Unlock air brakes (handle hanging down freely) and insert parachute rescue system handle’s

safety pin (if rescue system installed). Apply parking brake, if fitted. Open cabin door, unfasten safety harnesses and exit the cockpit (watch for the wheel fairings!). Block the wheels and secure the pitot tube by putting on a protection cover. Fit the tubes onto fuel tank vents so that fuel will not spill onto the wing in event of full fuel tanks, temperature expansion of fuel and/or parking on a slope. It is recommended to shut both fuel tank valves.

CAUTION! Should the aircraft be parked on a slope it is recommended to shut one of the fuel

valves to prevent overflowing of the adjacent fuel tank.

8.3 Cruise. Aircraft at MTOM, recommended cruise power of 5300 RPM at 15°C / 59°F at sea level altitude, flaps set to negative position (-5 degrees): Virus 912 LSA - cruise airspeed 116 kts Best economy cruising level is 7500 ft. There, cruise performance is equivalent or better than above due to IAS-TAS relation, but fuel consumption is lower. At these parameters the fuel burn is 3.2 US gal (12.2l) per hour. For detailed fuel consumption determination for various cruising regimes consult the Rotax 912 UL/ULS Operators manual.

CAUTION! It is not recommended to fly the aircraft at speeds exceeding 80 kts (150 km/h) using

flap setting other than negative.

CAUTION! If the fuel quantity in a fuel tank is low, it is possible that the engine starts to suck air

into the fuel system. To prevent this and consequent engine failure, always close the fuel valve of the tank where the fuel quantity is very low.

Cruising in rough conditions:

Should you experience turbulence, reduce airspeed and continue flying with flaps set to neutral position.

CAUTION! In rough air, reduce engine power if necessary to keep airspeed below VA (76 kts).

8.4 Approach. Descending with the Virus is the stage of flight where the most care should be taken. As the aircraft is essentially a glider, it is very slippery and builds up speed very fast. Start the descent by reducing throttle and keep your speed below VRA. During initial descent it is recommended you trim for a 10 kts lower speed than the one you decided to descent at. Do this for safety. In case you hit turbulence simply release forward pressure on the stick and the aircraft will slow down. Also, keep in mind you need to begin your descent quite some time before

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destination. A comfortable rate of descent is 500 fpm (2.5 m/s). So it takes you some 2 minutes for a 1000 ft (300 m) drop. At 105 kts (200 km/h) this means 3.6 NM for each 1000 ft drop. Upon entering the traffic pattern the aircraft should be slowing down. In order to do this, hold your altitude and reduce throttle to idle. When going below 80 kts (150 km/h), set flaps to neutral position. Set proper engine RPM to maintain speed of 70 kts (130 km/h). Trim the aircraft for comfortable stick forces. Before turning to base-leg, reduce power to idle and set flaps to 1st stage at 60 kts (110 km/h). Once out of the turn, reduce speed towards 55 kts (100 km/h). Power remains idle from the point of turning base all the way to touch-down. If you plan your approach this way, you will always be on the safe side - even if your engine fails, you will still be able to safely reach the runway! Turn to final at 55 kts (100 km/h). When in runway heading, set flaps to 2nd stage. Operate the air-brakes to obtain the desired descent path.

How to determine how much airbrakes you need for a certain airspeed?

Open them half-way and observe the runway. If the runway threshold is moving up, you are dropping too fast - retract the airbrakes a little. If the runway threshold is disappearing below your aircraft, you are dropping too slowly - extend airbrakes further. When working on airbrakes, it is important to keep the airspeed/pitch angle constant throughout final all the way to flare! The airbrakes will not impact your speed, just rate (angle) of descent. For pilots who are not used to operating airbrakes but throttle instead, keep in mind that airbrakes in Virus work just like throttle does: handle back equals less throttle, handle forward equals more throttle.

CAUTION! Never drop the airbrakes handle when using them, keep holding the handle even if you are

not moving it!

8.5 Landing. Roundout and touchdown (flare) occurs at following airspeeds:

o Calm Air at MTOW: 40 kts o Rough Air (including cross-winds: 42 kts

CAUTION! Land the aircraft in such a manner that the two main wheels touch the ground first, allow the

nose-wheel touchdown only after speed has been reduced below 25 kts. When lowering the nose wheel to the runway, rudder MUST NOT be deflected in any direction (rudder pedals centered).

WARNING! After touchdown, DO NOT retract airbrakes immediately, as this causes sudden lift increase

and the aircraft may rebound off the ground.

Should this occur, hold the elevator steady; under no circumstances attempt to follow aircraft’s

movement with elevator movements, for Virus 912 LSA tends to stabilize rebounding by itself. However, it is important to maintain run-way heading using the rudder at all times. Retract air brakes only after the aircraft has come to a complete standstill.

CAUTION! Should you be performing the touch-and-go maneuver, retract air brakes care-fully before re-

applying full power.

Crosswind approach and roundout

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CAUTION! Crosswinds prolong landing runway length due to elevated airspeed that should be used, see

previous page.

WARNING! If the crab method of drift correction has been used throughout the final approach and

roundout, the crab must be undone before touchdown by applying rudder to align the aircraft’s longitudinal axis with its direction of movement.

Parking

Come to a complete standstill by engaging brakes. Re-check RPM drop by switching ignition OFF and back ON, one by one. Leave the engine running at idle RPM for a minute in order to cool it down. Set master switch and ignition switches to OFF. Unlock air brakes (handle hanging down freely) and insert parachute rescue system handle’s safety pin (if rescue system installed). Apply parking brake, if fitted. Open cabin door, unfasten safety harnesses and exit the cockpit (watch for the wheel fairings!). Block the wheels and secure the pitot tube by putting on a protection cover. Fit the tubes onto fuel tank vents so that fuel will not spill onto the wing in event of full fuel tanks, temperature expansion of fuel and/or parking on a slope. It is recommended to shut both fuel tank valves.

CAUTION! Should the aircraft be parked on a slope it is recommended to shut one of the fuel valves to

prevent overflowing of the adjacent fuel tank.

8.6 Information on Stalls, Spins, and other useful pilot information.

Stall recovery

1. First reduce angle of attack by pushing the control stick forward, then

2. Add full power (throttle lever in full forward position)

3. Resume horizontal flight.

Spin recovery

Virus 912 LSA is constructed in such manner that it is difficult to be flown into a spin, and even so, only at aft center of gravity positions. However, once in a spin, intentionally or unintentionally, react as follows:

1 Set throttle to idle (lever in full back position). 2 Apply full rudder deflection in the direction opposite the spin. 3 Lower the nose towards the ground to build speed (stick forward). 4 As the aircraft stops spinning neutralize rudder deflection. 5 Slowly pull up and regain horizontal flight.

NOTE: Virus 912 LSA tends to reestablish straight and level flight by itself usually after having spun for a

mere 45°-90°.

WARNING! Keep the control stick centered along its lateral axis (no aileron deflections throughout the

recovery phase! Do not attempt to stop the aircraft from spinning using ailerons instead of rudder!

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WARNING! After having stopped spinning, recovering from the dive must be performed using gentle stick

movements (pull), rather than overstressing the aircraft. However, VNE must not be exceeded during this maneuver.

When the aircraft is wings-level and flies horizontally, add throttle and resume normal flight.

Handling and maintenance of the GRS Rescue Parachute System.

CAUTION! It is strongly recommenced to thoroughly inspect and grease the activation handle, preferably

using silicon spray, every 50 flight hours. All major repairs and damage repairs MUST be done by the manufacturer or authorized service personnel.

For all details concerning the GRS rescue system, please see the “GRS - Galaxy Rescue System Manual for Assembly and Use”.

How fast is too fast?

Based on two recent unfortunate events, where two pilots lost their newly acquired Sinus and Virus aircraft, the team of Pipistrel’s factory pilots decided to stress the importance of airspeed even more. Do read this passage thoroughly as everything mentioned below affects you as the pilot directly!

The two events Both the events took place during the first couple of hours pilots flew with their new aircraft. Therefore it is clear that they had not become completely familiar with all the flight capabilities offered by the Sinus and Virus. The circumstances of both the events were remarkably similar. Soon after the pilots picked up their new aircraft at the distributor’s facility, the aircraft were severely damaged aloft. One accident occurred during the first home-bound cross country flight; and the other during the first flights at its domestic airfield. Please note that the distributor had independently tested both mentioned aircraft up to VNE at altitudes of 300 to 500 meters (900 to 1500 feet) without any problems. The new owner/pilots, it was learned, flew their aircraft at higher altitudes, and very high speeds. One of them deployed airbrakes (spoilers) at a speed of 285 km/h (155 kts) - where the VNE of the aircraft was only 225 km/h (122 kts), the other was flying at 3000 m (10.000 ft) at 270 km/h (145 kts) IAS - where the VNE of the aircraft was 250 km/h (135 kts).

They both encountered severe vibrations caused by flutter. As a result, one aircraft’s fuselage broke in half just behind the cabin (the crew was saved thanks to the parachute rescue system), the other aircraft suffered less serious damage, as only the flaperon control tubes were broken. The pilot of the second machine then landed safely using elevator and rudder only. Fortunately both pilots survived the accident without injury. Thanks to the Brauniger ALPHA Multifunction Display’s (MFD) integrated Flight Data Recorder, we were able to reconstruct the flights and reveal what had really happened. What was the reason for the flutter causing both accidents? Both pilots significantly exceeded VNE. With the IAS to TAS correction factor taken into consideration, they were both flying faster than 315 km/h (170 kts)!

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You might say: “Why did they not keep their speed within safe limits? How could they be so thoughtless to afford themselves exceeding the VNE?” Speaking with the two pilots they both confessed they went over the line inadvertently. “Everything just happened so suddenly!” was what they both said. Therefore it is of vital importance to be familiar to all factors that might influence your flying to the point of accidentally exceeding the VNE.

Here is the relationship between the human factor and performance: The human body is not intended to be travelling at 250 km/h (135 kts), nor is it built to fly. Therefore, in flight, the human body and its signals should not be trusted. To determine the speed at which you are travelling, one normally relies upon two senses – the hearing and sight. The faster the objects around are passing by, the faster one is travelling. True enough. The louder the noise caused by air rushing past the airframe, the faster one must be cruising. True again. But let us confine ourselves to the scenarios associated with both of these events. At higher altitudes, human eye loses its ability to determine the speed of movement precisely. Because of that pilots, who are flying high up feel like they are flying very slowly. Additionally, it seems that at high speeds the air rushing past the airframe ought to cause a tremendous rushing noise. But this is wrong! In fact, rushing air noise is caused by drag. Modern aircraft like Sinus and Virus, manufactured of composite materials, have so little drag in cruise attitude, that they actually sound quieter than you would expect. Especially if you are used to wearing a headset when flying you must not rely on your ear as the instrument for determining speed. REMEMBER! When flying high, the only reliable tool to determine airspeed is the cockpit instrument - the airspeed indicator!

How to read and understand what the airspeed indicator tells you?

Let us first familiarize with the terms used below: IAS: stands for Indicated Airspeed. This is the speed the airspeed indicator reads. CAS: stands for Calibrated Airspeed. This is IAS corrected by the factor of aircraft’s attitude. No pitot tube (device to measure pressure used to indicate airspeed) is positioned exactly parallel to the air flow; therefore the input speed – IAS – must be corrected to obtain proper airspeed readings. With Sinus and Virus, IAS to CAS correction factors range from 1.00 to 1.04 (not a big deal). Now for the critical variableTAS: stands for True Airspeed. TAS is often regarded as the speed of air to which the aircraft’s air-frame is exposed. To obtain TAS you must have CAS as the input value and correct it by pressure altitude, temperature and air density variations. The maximum structural speed is linked to IAS. But light planes, manufactured of carbon reinforced plastics, with long, slick wings are more prone to flutter at high speeds than to structural failure. So flutter, a function of TAS, is the main factor of determining VNE for us, and most other carbon-reinforced-plastic aircraft producers. Flutter speed is linked to TAS, as it is directly caused by small differences in speed of air circulating the airframe. Hence air density is not a factor. For all who still doubt this, here are two quotes from distinguished sources on flutter being related to TAS: “Suffice to say that flutter relates to true airspeed (TAS) rather than equivalent air-speed (EAS), so aircraft that are operated at or beyond their VNE at altitude - where TAS increases for a given EAS – are more susceptible to flutter...” New Zealand CAA’ Vector Magazine (full passage at page 5 of

http://www.caa.govt.nz/fulltext/vector/vec01-4.pdf). “The critical flutter speed depends on TAS, air

density, and critical Mach number. The air density factor is almost canceled out by the TAS factor; and

most of us won’t fly fast enough for Mach number to be a factor. So TAS is what a pilot must be aware of!” Bob Cook, Flight Safety International. The airspeed indicator shows you the IAS, but this is sadly NOT the speed of air to which the aircraft’s airframe is exposed. IAS and TAS are almost the same at sea

level but can greatly differ as the altitude increases. So flying at high altitudes, where the air is thinner, results in misinterpreting indicated airspeed. The indicated airspeed value may actually be much lower than speed of air to which the aircraft is exposed, the TAS. So is VNE related to IAS or TAS? Although the redline on our altimeter may imply that it is associated with IAS, in reality, for all gliders which are

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inherently prone to flutter, VNE must be assumed to be a TAS reading. The two owners mentioned above found out the hard way that this is a fact.

How much difference is there between IAS and TAS in practical terms?

Data is for standard atmosphere. To obtain correct speeds for particular atmospheric conditions please take advantage of the conversion tables which follow:

The table below indicates how fast you may fly at a certain altitude to maintain constant True Air Speed (TAS).

The table below indicates how TAS increases with altitude while keeping IAS constant.

As you can see from the table above the differences between IAS and TAS are substantial at altitude, and MUST be respected at all times!

REMEMBER! Do not trust your ears. Do not trust your eyes.

Trust the instruments and be aware of the IAS to TAS relationship!

Keep that in mind every time you go flying. Pipistrel wishes you happy landings!

Myth: One can fully deflect the controls as long as he or she is flying below maneuvering speed.

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This is flat wrong! The wing structure in light planes is usually certified to take +3.8 G’s, -1.52 G’s (plus a certain safety factor). Put more load on the wing than that and you can lose a wing. But here is the nice part: below a certain speed, the wing simply cannot put out a full 3.8 G’s of lift! It will stall first! This speed is called Maneuvering Speed or VA. Maneuvering Speed is defined as the maximum speed the plane can be flying at and still stall before the wing breaks no matter how much you pull back on the stick. If you are going slower than the VA and you pull the stick all the way back, the wing will stall without braking physically. If you are going faster than the VA and you pull the stick all the way back, the wing can put out so much lift that it can be expected to break. Therefore people think they can deflect the stick as much as they desire below Maneuvering Speed and stay alive. Right? No, wrong! This is a trick question. The Maneuvering Speed is based on pulling back on the stick, not pushing it forward! Note what was said above: The VA is defined as how fast you can fly and not be able to put out more than 3.8 G’s of lift. But while the plane is certified for positive 3.8 G’s, it is only certified for a negative G-load of 1.52 G’s! In other words, you can fail the wing in the negative direction by pushing forward on the stick well below the VA! Few pilots know this. Also, for airliners, certification basis require that the rudder can be fully deflected below Maneuvering Speed, but only if the plane is not in a sideslip of any kind! (e.g. crab method of approach) Does this make sense at all? Why would you need to fully deflect the rudder if not to re-establish wings-level flight? In a wonderfully-timed accident shortly after Sept. 11th, 2001; which many first thought an act of terrorism, an Airbus pilot stomped the rudder in wake turbulence while the plane was in a considerable sideslip. The combined loads of the sideslip and the deflected rudder took the vertical stabilizer to its critical load. A very simple numerical analysis based on the black box confirmed this. The airplane lost its vertical stabilizer in flight and you know the rest. Also, if you are at your maximum allowable g-limit (e.g.

3.8) and you deflect the ailerons even slightly, you are actually asking for more lift from one wing than the allowable limit! Therefore combined elevator and aileron deflections can break the plane, even if the elevator is positive only!

SO, WHEN YOU THINK THAT YOU CAN DO AS YOU PLEASE WITH THE CONTROLS BELOW MANEUVERING SPEED, YOU ARE WRONG!

9. AIRCRAFT GROUND HANDLING AND SERVICING.

9.1 Ground Handling.

Engine start-up

Make sure both fuel valves are open and master switch in OFF position (key full left).Should the engine be cold, apply choke (lever full back). Set master switch ON (key in full right position). Set both magneto switches ON. Avionics OFF. Engage engine starter and keep it engaged until the engine starts. Set throttle to 2500 RPM. Slide the choke lever forward gradually. CAUTION! When the engine is very cold, the engine may refuse to start. Should this occur, move the choke handle fully backwards and hold it there for some 20 seconds to make mixture richer.

Engine warm-up procedure

CAUTION! Avoid engine warm-up at idle throttle as this causes the spark plugs to turn dirty and

the engine to overheat.

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add full power (throttle lever full forward) and monitor engine’s RPM. Make sure they range

between maximum recommended and maximum allowable RPM limits.

NOTE: The engine should not reach 5800 RPM on the ground. Engines are factory set to reach

maximum ground RPM of 5300 - 5500 at sea level at 68° F. Maximum ground RPM may vary depending on the season and service elevation.

CAUTION! Should engine’s RPM be lower than the recommended on ground amount (min. 5100

RPM) or in excess of maximum allowable RPM on ground (5800) during this maneuver, check engine and wiring for correct installation.

Taxi

Release parking brake. Taxing technique does not differ from other aircraft equipped with a steerable nose wheel. Prior to taxiing it is essential to check wheel brakes for proper braking action. In the case you expect o taxi a long way, take engine warm-up time into account and begin taxiing immediately after engine start-up. Warm-up the engine during taxi so as not to cause engine overheating because of prolonged ground operation.

Holding point

Make sure the temperatures at full power range are within operational limits. Make sure the safety harnesses are fastened and doors closed and secured at all three closing points. Set flaps to 2nd position (flap handle full up). Power reduced to idle.

CAUTION! Should the engine start to overheat because of long taxi and holding, shut down the

engine and wait for the engine temperatures drop to reasonable values. If possible, point the aircraft’s nose into the wind. This will provide radiators with airflow to cool down the engine faster.

9.2 Servicing.

Tie down

Point the aircraft into the wind and retract flaps fully. Chock all three wheels. Remove the caps covering mounting holes on the bottom part of the wing (located 15 ft from the fuselage) and carefully screw in the two screw-in rings provided. Secure tie-down ropes to the wing tie-down rings at an approximately 45-degree angle to the ground. When using rope of a non-synthetic material, leave sufficient slack to avoid damage to the aircraft, should the ropes contract. To tie down the tail, tie a rope through the tail skid and secure it to the ground. At the end, cover the pitot tube with a protection cover.

Draining and refueling

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Whenever draining or refueling, make sure master switch is set to OFF (key in full left position). Draining the fuel system: The gascolator is located beneath the bottom engine cover on the left hand side of the fuselage. To drain the fuel system, open the drain valve on the gascolator. Drain approximately 1/2 cup of fuel. Try to prevent ground pollution by collecting the fuel with a canister. To close the valve, simply turn it in the opposite direction. Do not use force or special tools!

CAUTION! Always drain the fuel system before moving the aircraft. This ensures any water or

particles will be drained and not remixed and remain in the fuel tanks.

Refueling

CAUTION! Before refueling, it is necessary to ground the aircraft!

Refueling can be done by pouring fuel through the fuel tank openings on top of the wings or by using the single point fueling valve on the lower firewall. Refueling using the electrical fuel pump: First, make sure the fuel hoses are connected to wing connectors and that both fuel valves are open. Connect one end of the fuel pump to the valve beneath the bottom engine cowl. Submerge the other end of the fuel pump, which has a filter attached, into the fuel container. Engage the fuel pump by engaging the 12 V socket switch on the instrument panel. After refueling, it is recommended to prevent air pockets from forming inside the fuel system, that the pilot drains some fuel with both fuel valves fully open. Also, leave the engine running at idle power for a couple of minutes prior to taking-off, and test the engine at full power for a minimum of 30 seconds before takeoff roll begins.

Should you be experiencing slow refueling with the electrical fuel pump, you should replace the filter. You can use any fuel filter for this application. It is recommended to use additional plastic tubes attached to the fuel tank vents and leading to the ground in order to avoid over-spills of fuel onto the airframe when filling the tanks completely.

CAUTION! Use authorized plastic containers to transport and store fuel only! Metal canisters

cause water to condense on the inside, which may lead to engine failure.

Engine lubrication system

Rotax 912 is a four-stroke engine, equipped with a dry sump and lubricated centrally with use of its own oil pump. All the oil needed is located inside an outer canister. When the engine is running, the oil cools by passing through a radiator, located on the left-hand side of the bottom engine cover. The oil quantity can be checked visually with the oil level bar. Make sure the oil quantity is sufficient (within marked limits) at all times.

CAUTION! Oil temperature, pressure, and quality is precisely defined and must not, under any

circumstances, vary from the placards and standards.

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Schematic of engine lubrication system

Cleaning of aircraft including windscreen and windows.

Use fresh water and a soft piece of cloth to clean the aircraft’s exterior. If you are unable to

remove certain spots, consider using mild detergents. Afterwards, rinse the entire surface thoroughly. Lexan glass surfaces are protected by an anti-scratch layer on the outside and an anti-fog coating on the inside of the cabin. Always use fresh water only to clean the glass surfaces, not to damage these protection layers and coatings. To protect the aircraft’s surface (excluding glass surfaces) from the environmental contaminants, use best affordable car wax. The interior is to be cleaned with a vacuum cleaner.

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

MARKING

IAS [kts]

Definition

White band

36 -70

Full Flap Operating Range. Lower limit is the maximum weight VS0 in landing configuration. Upper limit is maximum speed permissible with flaps extended.

Green band

42 -76

Normal Operating Range Lower end is maximum weight VS1 at most forward C.G. with flaps retracted. Upper limit is maximum structural cruising speed.

Yellow band

76 - 120

Maneuver the aircraft with caution in calm air only.

Red line

120

Maximum speed for all operations

Blue line

Best climb rate speed (VY)

Instrument

Red line (minimum)

Green arc (normal)

Yellow arc (caution)

Red line (maximum)

Tachometer (RPM)

Oil temperature

Cylinder head temp.

Oil pressure

1600

50°C (122°F)

1.0 bar (14.5 psi)

1600-5500 90-110°C

(194-230°F)

5500-5800

110-140°C (230-284°F)

110-120°C (230-248°F)

5800

140°C (284°F)

120°C (248°F)

6.0 bar (87.0 psi)

10. Required Placards and Markings.

10.1 Airspeed Indicator Markings. Airspeed indicator calibration (IAS to CAS) - Pitot tube’s

mounting point and construction makes IAS to CAS correction values insignificant. Therefore pilots should regard IAS to be same as CAS. IAS = CAS.

10.2 Operating Limitations on instrument panel.

10.3 Passenger warnings.

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10.4 NO INTENTIONAL SPINS BEYOND ¼ TURN (90

10.5 Empty weight. 702.5 lbs

10.6 Maximum takeoff weight. MTOW – 1210 lbs

10.7 Max and min weight of crew. Max Crew Weight 519 lbs, Min Crew Weight 119 lbs.

10.8 Seat for solo operations of two seated gliders. Solo pilot may fly in either left or right seat.

10.9 Allowable baggage weight. 55 lbs (25 KG)

NOTE: If GRS Recovery Chute System is removed, up to 88 lbs (40 KG) of baggage is allowable.

)

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Quantity=13 Gallons

Placards

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11. Supplementary information.

11.1 Familiarization flight procedures. This chapter has been written to assist owners/pilots/instructors of Virus 912 LSA on their quest to learn how to safely and efficiently fly this aircraft in addition to the information already assembled in the rest of this POH. This section will cover most operations the aircraft offers in an order established in section on Normal procedures and recommended speeds. Please consider what follows as an add-on to that chapter.

Engine start-up

First and foremost make sure you have sufficient fuel quantity on board for the desired length of flight. If you are not completely confident there is enough, step out of the aircraft and add more fuel into the tanks. There is an old aviators’ saying: “The only time you have too much fuel is when you are on fire.” When engaging the engine starter, wheel brakes MUST be engaged. To keep your propeller in perfect condition, avoid starting up on areas where there are small stones on the ground. Those little stones can easily be picked up by the propellers causing damage to the blades. Warming up must be conducted below 2500 RPM. When reaching safe operational engine temperatures, verify maximum engine ground RPM. Hold the stick back completely and slowly (!) add throttle to full power, then verify RPM.

Taxi

Taxiing with the Virus 912 LSA is rather simple considering the steerable nose wheel. For sharper turns on the ground you can also use wheel brakes to assist yourself. It is recommended you taxi slow, up to 10 km/s (5 kts), while holding the stick back fully to ease the pressure of the nose wheel. During taxiing, monitor engine temperatures. Due to low airflow around the radiators the CHT and Oil temperature will rise during long taxi periods. If you are holding position, do not leave throttle at idle. It is better you have some 2500 RPM as this will provide some airflow from the propeller to the radiators and the temperatures will not rise so quickly. Should you see engine temperatures exceed safe operational

values, shut off the engine, point the aircraft’s nose into the wind and wait for the temperatures to

reduce.

Take off and initial climb

Having checked and set all engine and aircraft parameters, you should be ready for take-off by now. Re-verify both fuel valves be open and the airbrakes retracted and locked (handle full up). Trim lever should be in the middle.

Start the take-off roll gradually. Keep adding throttle slowly and smoothly full power. There are two reasons for this. First, you change flight stage from zero movement to acceleration slowly; this pro-vides you with time to react to conditions. Second, especially if taking-off from a gravel runway, this method of adding full throttle will prevent the little stones on the runway from damaging the propeller. Extremely short runways are an exception. There you should line up the aircraft, set flaps to 2nd stage, step on the brakes, apply full power and release the brakes. As you start to move, pull the stick 1/3 of elevator’s deflection backwards to ease the pressure on the nose wheel and lift it off the runway slightly. Do not use full back deflection as this will cause the aircraft’s tail to touch the ground.

When the nose wheel has lifted off the ground, there is nothing else but to hold the same pitch attitude and the aircraft will become airborne. Crosswind take-offs, depending on wind strength, require a little bit of aileron deflection into the wind. Remember, wings must stay level throughout ground-roll, rotation

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and initial climb! Having lifted off the ground, gently push the stick forward just a bit to accelerate. At some 90 km/ h (50 kts) set flaps to 1st stage, at 110 km/h (60 kts) set them to neutral.

Climb

A comfortable setting for climb is flaps in neutral position, speed of 70 kts (130 km/h) at or slightly below 5500 RPM. In summer time or when outside temperature exceeds 30°C you should consider climbing at some 85 kts (160 km/h) to provide more airflow to the engine radiators. Trim the aircraft for comfortable stick forces.

Cruise

Passing through 85 kts (160 km/h), set flaps to negative position (handle full down). A comfortable cruise setting is 5300 engine RPM. As the Virus is sensitive to flap settings, especially when it comes to fuel efficiency, ALWAYS use negative stage of flaps beyond 85 kts (160 km/h) and neutral for level flight below 70 kts (130 km/h).

Cruising fast, do not kick-in rudder for turns! Above 85 kts (160 km/h) the rudder becomes almost insignificant in comparison to aileron deflections when it comes to making a turn. Cruising fast, it is extremely important to fly coordinated (ball in the middle) as this increases efficiency and de-creases side-pressure onto vertical tail surfaces. Also, pay attention to turbulence. If you hit turbulence at speeds greater than VRA, reduce power immediately and pull the nose up to reduce speed. If flying a traffic pattern, keep flaps in neutral position and set engine power so that airspeed does not exceed 80 kts.

Descent

Descending with the Virus is the stage of flight where the most care should be taken. As the aircraft is essentially a glider, it is very slippery and builds up speed very fast. Start the descent by reducing throttle and keep your speed below VA. During initial descent it is recommended you trim for a 10 kts lower speed than the one you decided to descent at. Do this for safety. In case you hit turbulence simply release forward pressure on the stick and the aircraft will slow down. Also, keep in mind that you need to begin your descent quite some time before reaching your destination. A comfortable rate of descent is 500 fpm (2.5 m/s). So it takes you some 2 minutes for a 1000 ft (300 m) drop. At 105 kts (200 km/h) this means 3.6 NM for each 1000 ft drop.

Entering the traffic pattern the aircraft must be slowing down. In order to do this, hold your altitude and reduce throttle to idle. When going below 80 kts (150 km/h), set flaps to neutral position. Set proper engine RPM to maintain speed of 70 kts (130 km/h). Trim the aircraft for comfortable stick forces. Before turning to base-leg, reduce power to idle and set flaps to 1st stage at 60 kts (110 km/h). Once out of the turn, reduce speed towards 55 kts (100 km/h). Power remains idle from the point of turning base all the way to touch-down. If you plan your approach this way, you will always be on the safe side - even if your engine fails, you will still be able to safely reach the runway!

Turn to final at 55 kts (100 km/h). When in runway heading, set flaps to 2nd stage. Operate the air-brakes to obtain the desired descent path (if applicable).

How to determine how much airbrakes you need for a certain airspeed? Open them half-way and observe the runway. If the runway threshold is moving up, you are dropping too fast - retract the airbrakes a little. If the runway threshold is disappearing below your aircraft, you are dropping too slowly - extend airbrakes further. When working on airbrakes, it is important to keep the airspeed/pitch angle constant throughout final all the way to flare! The airbrakes will not impact your speed, just rate (angle) of descent. For pilots who are not used to operating airbrakes but throttle

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instead, keep in mind that airbrakes in Virus work just like throttle does: handle back equals less throttle, handle forward equals more throttle.

CAUTION! Never drop the airbrakes handle when using them, keep holding the handle even if you are

not moving it!

Roundout (Flare) and touchdown

Your speed should be a constant 55 kts (100 km/h) throughout the final with the descent path constant as well. At a height of 10 meters (25 feet) start a gentle flare and approach the aircraft must touch down with the main (back) wheels first, so that you will not bounce on the runway. After touchdown, operate the rudder pedals if necessary to maintain runway heading and try to have the nose wheel off the ground for as long as possible. When the nose wheel is to touch the ground, rudder pedals MUST be exactly in the middle not to cause damage to the steering mechanism. While braking, hold the stick back fully! Once you have come to a standstill, retract flaps all the way to negative position (handle full down) and retract and lock the airbrakes - handle full up.

Should you bounce off the runway after touch-down, do not, under any circumstances, push stick forward or retract airbrakes. Spoilers (airbrakes) stay fully extended, the stick goes backwards slightly. Bouncing tends to reduce by itself – just keep your aircraft pointed straight down the runway.

Crosswind landings, depending on the wind speed, require some sort of drift correction. Most efficient is the low-wing method, where you are to lower the wing into the wind slightly and maintain course by applying appropriate rudder deflection. You can also try the crab method.

Crosswind landings on paved runways (asphalt, concrete, tarmac...)

In this case, special attention must be paid to straightening the aircraft before touchdown in order not to damage the undercarriage because of increased surface grip on impact. Should the crosswind component be strong (8 kts and over), it is recommended to gently flare in such a manner, that one of the main wheels touches down an instant before the other (e.g. if there is crosswind from your left, the left wheel should touch down just before the right wheel does). This way the undercarriage is less likely to be damaged due to side forces.

Landing in strong turbulence and/or gusty winds

First of all, approach airspeed must be increased for half of the value of wind gusts (e.g. if the wind is gusting for 6 kts, add 3 kts to the final approach speed). In such conditions it is recommended to use only the 1st stage of flaps for increased maneuverability. In very strong winds (20 kts and more), use neutral flaps (0 deg.) for the complete approach and roundout.

Parking

Nothing special to add here. Taxi to the apron with flaps in negative position (minimum lift) and spoilers retracted. Again, taxi slowly for reasons mentioned under “Taxi.”. Come to a standstill, shut down the

engine, insert the parachute rescue system activation handle’s safety pin, unlock and leave the airbrakes handle hanging down freely (this reduces stress to airbrake plate’s springs and maintains their stiffness).

It is recommended to shut both fuel valves for longer parking or when parked on a slope.

11.2 Pilot operating advisories.

Parachute rescue system: use, handling and maintenance

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GRS System description The GRS rocket charged parachute rescue system provides you with a chance to rescue yourself from an unexpected situation. The system is placed inside a durable cylinder mounted on the right hand side of the baggage compartment. Inside this cylinder is the parachute which stored inside a deployment bag with a rocket engine underneath. This brand new design deploys a canopy that is not gradually drawn from the container, exposed to distortion by air currents, but it is safely open after 0.4 to 0.7 seconds in distance of 15-18 meters above the aircraft. It is carried there in a special deployment bag, which decreases the risk of aircraft debris fouling the canopy. The parachute rescue system is activated manually, by pulling the activation handle mounted on the back wall above. After being fired, the man canopy is open and fully inflated in about 3.2 seconds.

WARNING! Activation handle safety pin should be inserted when the aircraft is parked or hangared to

prevent accidental deployment. However, the instant pilot boards the aircraft, safety pin MUST be removed!

Typical situations for use of the parachute rescue system are:

structural failure mid-air collision loss of control over aircraft engine failure over hostile terrain pilot incapacitation (incl. heart attack, stroke, temp. blindness, disorientation...)

Prior to firing the system, provided time allows:

shut down the engine and set master switch to OFF (key in full left position) shut both fuel valves fasten safety harnesses tightly protect your face and body.

To deploy the parachute jerk the activation handle hard to a length of at least 1 foot towards the instrument panel.

Once you have pulled the handle and the rocked is deployed, it will be about two seconds before you feel the impact produced by two forces. The first force is produced by stretching of all the sys-tem. The second force follows after the inflation of the canopy from opening impact and it will seem to you that the aircraft is pulled backwards briefly. The airspeed is reduced instantly and the aircraft now starts to descent underneath the canopy.

CAUTION! Should you end up in power lines (carrying electrical current), DO NOT under any

circumstances touch any metal parts inside or outside the cockpit. This also applies to anyone attempting to help or rescue you. Be aware that anyone touching any part of the aircraft while standing on the ground will probably suffer mayor injury or die of electrocution. Therefore, you are strongly encouraged to confine your movements until qualified rescue personal arrives at the site to assist you.

After the parachute rescue system has been used or if you suspect any possible damage to the sys-tem, do not hesitate and immediately contact the manufacturer!

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER

GRS Handling and maintenance

CAUTION! It is strongly recommenced to thoroughly inspect and grease the activation handle, preferably

using silicon spray, every 50 flight hours. All major repairs and damage repairs MUST be done by the manufacturer or authorized service personnel.

For all details concerning the GRS rescue system, please see the “GRS - Galaxy Rescue System Manual for Assembly and Use”.

12. MAINTENANCE MANUAL. (See separate document)

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Pipistrel Virus 912 S-LSA Glider Operating Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual