Grob Astir CS G102 Flight Manual

FLIGHT MANUAL G102

The Manual belongs to ASTIR CS

Registration Number: Serial Number:

Manufactured by: Burkhart Grob Flugzeugbau

86874 Tussenhausen - Mattsies
Flugplatz Mindelheim - Mattsies
Telephone: [phone]
e-mail: [e-mail]
Germany

Owner:

Published: August 1975

This manual should always be kept on board the glider

FLIGHT MANUAL ASTIR CS

List of effective pages

Chapter Page Date Reference

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Cover Page
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Rev. 9 28. Nov. 2005

FLIGHT MANUAL ASTIR CS

Contents

Contents page

3

List of effective pages........................................................................... 2

Contents................................................................................................ 3

Addenda................................................................................................ 4

Flying Limitations.................................................................................. 5

Record of weight alterations and weighing........................................... 7

Placards to be displayed in the cockpit ................................................ 9

Notes on Flying the Glider.................................................................. 13

Emergency Procedures...................................................................... 16

Minimum equipment ........................................................................... 18

Weight and center of gravity positions ............................................... 18

Measurements.................................................................................... 18

Weights and moments of the control surfaces ................................... 22

Assembly ............................................................................................ 22

Checks to be made after assembly .................................................... 24

Pre-Launch checks............................................................................. 24

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FLIGHT MANUAL ASTIR CS

Flying Limitations

Airspeed Limits (I.A.S.) km/h mph kts

Never exceed (VNE) ..............................250 ........... 155 ..........135

in rough air (VB)................................... 250 .......... 155......... 135

Maneuvering (VA) ...............................170 .......... 105 ...........92

On aero tow (VT) .................................... 170............105 ............92

On winch tow (V

Airbrakes ................................................. 250 ............ 155...........135

Gear extended ....................................... 250 ........... 155 ..........135

A.S.I. Colour Code

33 - 92 kts .............................. Green Border - 60-170 km/h

92 - 135 kts ............................ Yellow Border - 170-250 km/h

At 135 kts ..........................................Red Strip - bei 250 km/h

Weights lbs kp

Empty Weight.................................................circa 560..........255

Maximum permitted weight

without water-ballast ...........................................836 ........ 380

with water-ballast ............................................... 990 .........450

Maximum permitted weight
of non-supporting ports

Weak Link on Winch cable

Maximum Load

Cloud Flying and simple Aerobatics

Permitted if water-ballast is not being carried: See pages 12 - 14

) ...................................120 ............. 74.............64

w

...........................................

.......................................................

528

1100

..........

..........

240

500

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FLIGHT MANUAL ASTIR CS

Classification Group

Standard Class (German N)

Centre of Gravity positions

Leveling means with a 1000:40 Incidence Board

set up horizontal on the top of
the rear fuselage.

Datum Line (D, L.) Front edge) of wing at root

Serial-No. 1002 – 1437:
Maximum forward position of C. of G. 250 mm behind D. L. (9.84 i n)
Maximum rearward position 425 mm behind D. L. (16.73 in)

Serial–No. 1438 – 1536:
Maximum forward position of C. of G. 310 mm behind D. L. (12,20 in)
Maximum rearward position 480 mm behind D. L. (18,90 in)

Loading Limitations ASTIR CS

Empty weight of glider and maximum cockpit load, see page 7.
Minimum cockpit load: 154 lbs (70 kp)
The permissible all up weight must NEVER be exceeded.

6

Maximum all up weight

without water-ballast 836 lbs (380 kp)
with water-ballast 990 lbs (450 kp)

The weight of water-ballast is dependent on the cockpit weight (Pilot
with parachute and luggage). See page 7.

Weight deficiencies should be corrected by securing or removing some
ballast in the seat.

The C. of G. of the pilot with a parachute on lies 475 mm in front of
the Datum Line.

Rev. 9 28. Nov. 2005

FLIGHT MANUAL ASTIR CS

Record of weight alterations and weighing

ASTIR CS Works Number:

7

Date of weight

alteration:

Weighing by

List of

accessories

(Date):

Empty Weight

(lbs):

Empty Weight

C. of G.

position

behind D.L.

(mm)

Maximum

Cockpit

Weight (lbs)

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FLIGHT MANUAL ASTIR CS

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Rev. 9 28. Nov. 2005

g

A

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FLIGHT MANUAL ASTIR CS

Placards to be displayed in the cockpit

Maximum weight kp lbs

without water ballast: 380 836
with water ballast: 450 990

Airspeed limits km/h rn.p.h. knots

Never exceed 250 155 135
in rough air 250 155 135
Manoeuvrin
On aero tow 170 105 92

On winch tow 120 74 64

irbrakes 250 155 135

Gear extended 250 155 135

170 105 92

9

Payload (pilot and parachute)
The maximum weight must not be exceeded.

Minimum payload: 70 kp, 154 lbs.
Less weight must be compensated with
ballast in the seat.

Placard to be displayed near undercarriage

Weak links for towing
500 kp, 1100 lbs. max.
Tire: 2,5 bar, 36

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FLIGHT MANUAL ASTIR CS

Ballast Weight

Pilot Weight

Incl. Parachute

kg lbs
55 120 6
60 130 4
65 145 2

70 - 100 155 - 220 0

Cover of the container has to be closed tight.

Ballast weight

red

10

Quantity

(Total)

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FLIGHT MANUAL ASTIR CS

11

DOWN Under-carriage UP

Handle moves in
Slot on right of
cockpit

Trimmer

On left of cockpit.
GREEN lever

Air-brakes

On the left-hand
Side of the cockpit
BLUE handle

Pedal
Adjustment

Small BLACK
knob
On the top of the
Instrument panel
(right hand)

Air-vent

Small BLACK
knob
On the top of the
instrument panel.
(left hand)

Water-ballast
Jettison

On the right of the
Cockpit.
WHITE lever

Canopy

Round RED knobs.
Left of canopy-frame
OPEN.
Right of canopy­Frame JETTISON

Cable Release

In front of the stick
on the left.
YELLOW knob

Rev. 9 28. Nov. 2005

FLIGHT MANUAL ASTIR CS

Graph of True v. Indicated Airspeed, showing the effect of Position
Errors.

When the A.S.I. is connected to the following pressure sources:
A.S.I. - Pitot head in tail fin static vents side of the fuselage before the wing root.

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FLIGHT MANUAL ASTIR CS

Notes on Flying the Glider

Winch/Auto-tow-Launch

Maximum permitted launch speed: 64 kts
The glider has a belly-hook in the undercarriage well in front of the wheel. A cable
launch presents no difficulties with any C. of G. positions or weight configurations. The
glider has no tendency to balloon and is very stable on the launch. Up to a height of
300ft the nose should be held down if the launch is fast.

Aero tow

Maximum permitted towing speed: 92 kts
The gliders C. of G. position allows the aero tow to be carried out using either the nose
— or belly-hook. During the whole of the time on tow, the glider can be easily controlled
with rudder and aileron, full movements of which can be used if necessary. Even in
strong cross-winds the glider shows no tendency to wander around. At 32 kts the glider
can be lifted off: with 37 — 40 kts indicated, the glider climbs on its own. The
undercarriage can be retracted whilst still on tow. The yellow release knob is positioned
on the left in front of the stick, and should be pulled fully back when releasing the tow­rope.

Weak Link in tow-cable

Maximum load 1100 lbs

Rudder-pedal Adjustment

To adjust the rudder pedals, push lightly forward on them with the heels and disconnect
the locking device by pulling the handle on the instrument panel. The pedals move
towards the pilot by themselves: to adjust them forward you have to push them against
the pressure of the springs with your heels. The pedals will lock themselves in the
position required when the handle is released.

Canopy

The single-piece perspex canopy has a clear-vision panel and ventilation port, and is
fitted on hinges. The handle for opening it is located on the left-hand side of the canopy
surround: that for jettisoning is on the right-hand fuselage side. To jettison the canopy,
pull both handles back and push it up and away with the left hand.

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FLIGHT MANUAL ASTIR CS

Retractable Undercarriage

The undercarriage control lever is located on the right of the cockpit. When retracted or
lowered, the wheel should be locked in place by pushing the control lever in towards
the fuselage side.

Air-brakes

The lever for the air-brakes is situated on the left-hand side of the cockpit. Before
beginning a launch, check that the air-brakes are closed and locked. One should avoid
trying to land with full brake out, since the effectiveness of the brakes means that the
glider is descending fast.

Wheel brake

The lever for the wheel brake is located on the stick.

Trim

The built-in trimmer can be progressively adjusted. The control lever for it is positioned
on the left-hand side of the cockpit behind the airbrake lever. Trim range from 32 kts —
97 kts.

Flight with water-ballast

The glider has the same all up weight as a standard 2 seat glider, when loaded with
water-ballast and a full cockpit load. The slow flight and stalling characteristics of the
fully loaded glider are a little different from one flown without water-ballast. The stalling
speed will be increased to 38 kts. Also larger control movements will be necessary.
The glider will spin cleanly but will recover immediately spin recovery action is taken.
The pilot is advised to have extra height when slow flying or approaching to land while
carrying water-ballast.

Use of Water-ballast

The water-ballast tanks are situated in the front part of the wings, from the root
outwards. Each wing can hold 50 litres. The tanks are filled through an opening in the
top surface of the wing. This is covered by a plug, which can be removed by screwing in
a bolt. The water is drained off through an opening in the underside of the fuselage
behind the wheel-box. To open the valves of the tanks, the control lever on the right­hand side of the cockpit should be pulled backwards. It takes about 3 minutes for the
tanks to empty themselves.

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FLIGHT MANUAL ASTIR CS

Air from the tanks escapes through the overflow pipe that runs down to a point an the
underside of the wing near the root. When flying with water-ballast the connecting-tape
that covers the gap between fuselage and wings, should be folded back on the
underside in the region of the spar, so that any excess water which may appear runs out
rather than down into the fuselage.
During long flights at an air temperature of 0 ° C (32 ° F) the water-ballast must be
jettisoned because there is danger of collapse of the ballast tanks. When a field landing is
to be made the water-ballast must be jettisoned.
The glider must not be parked over-night with water-ballast on board. If the glider has to
be towed for a long way on the ground with water-ballast on board, the tanks should be
emptied.
When de-rigging the water-ballast tanks will empty themselves through the wing root
connecting pipes.

Stalling Characteristics

Warning of the stall occurs at a speed of 32-35 kts (depending on wing loading), when the
top of the tail unit begins to shudder. If the stick is pulled back even further, the glider
"mushes" but, remains controllable, it being possible to make turns up to an angle of
bank of 20' without the wing dropping away. If the stick is released the glider returns
immediately to the normal flying attitude. If the stick is pulled back quickly, the nose will
drop away but any tendency for a wing to fall can be controlled by the rudder.

Aerobatics

Permitted maneuvers and speeds at which they should be initiated:

Loop..........................................................................................................................92 kts

Chandelle...................................................................................................................92 kts

Steep turn................................................................................................................. 65 kts

Lazy eight ..................................................................................................................65 kts

Spins:

From the fully stalled position, put on full aileron and rudder (crossed). Keep the stick
back. To stop the spin centralize or release one of the controls. Height lost per rotation
is approximately 220 ft. The speed reached when leveling out is about 86 kts.
Maximal positive g loading + 5,3.
Manoeuvres that involve negative g loads are prohibited.
Unorthodox manoeuvres are likewise prohibited

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Rev. 9 28. Nov. 2005