SPECIFICATION
PC21 PILATUS MK2
SIZE .120 OR 30CC SCALE 1:5 ARF
- Wingspan: 1772mm (69.72in)
- Length: 2019mm (79.5 in)
- Flying weight: 6.4 - 7.2 kg
- Wing area: 57.6 dm2
- Wing loading: 113g/dm2
- Wing type: Naca airfoils
- Covering type: Genuine ORACOVER®
- Retract gear type: Air-retract With CNC
Suspension Metal Struts (included)
- Spinner size: 90mm (included)
- Radio: 6 channel minimum (not included)
- Servo: 10 standard servo: 2 aileron;2 flap;
2 elevator; 1 rudder; 1 steering nose; 1 retract;
1 throttle (not included)
- Recommended receiver battery:
4,8-6.0V 2000mAh NiMH (not included)
- Servo mount: 21mm x 42 mm
- Propeller: suit with your engine
- Engine: 1.20/ 2-stroke or 1.40/4-stroke glow
engine or 20-30cc gas engine (not included)
- Motor: brushless outrunner 1600-2200 W,
450 KV (not included)
- Gravity CG: 166 mm (6.5 in) Back from the
leading edge of the wing, at the fuselage
- Control throw Ailerons: Low: 13mm up/down,
10% expo; High: 16mm up/down, 10% expo
- Control throw Elevators: Low: 13mm up/down,
12% expo; High: 16mm up/down, 12% expo
- Control throw Rudder: Low: 30mm right/left,
15% expo; High: 40mm right/left, 15% expo
- Control throw Flaps: Mid: 25mm down;
Landing: 35mm down
- Experience level: Intermediate
- Plane type: Scale Military
RECOMMENDED MOTOR AND BATTERY SET UP
- Motor: RIMFIRE 1.20 (not included)
- Lipo cell: 5-6 cells / 5500 – 6000mAh (not included)
- Esc: 80A (not included)
Instruction Manual
GP
version
EP
version
Instruction Manual
1
Thank you for purchasing Phoenix Model products. With over 20 years experience in production and fly testing,
Phoenix Model is committed to bring the best quality products and good service to customers. Along with a team of
creative engineers and skilled workers, we will always accompany with customers by our great experiences, fully
enthusiasm... which will burn our passion!! Joining with us to explore and conquer challenges in the sky ...
Your satisfaction is our success.
Please read through this manual before starting construction.
Academy of Model Aeronautics
5151 East Memorial Drive Muncie, IN 47302-9252
Tele. (800) 435-9262
Fax (765) 741-0057
Academy of Model Aeronautics: If you are not already a member of the AMA, please join! The AMA is the
governing body of model aviation and membership provides liability insurance coverage, protects modelers’
rights and interests and is required to fly at most R/C sites.
TABLE OF CONTENTS
INTRODUCTION
Or via the Internet at: http://www.modelaircraft.org
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Introduction
Warranty
Disclaimer
Safety precaution
Important building notes
Suggestion
Flight warnings
Flight warnings
Covering tools
Adhesives and required tools
Academy of model aeronautics national
Model aircraft safety code
Preparations
Installing the ailerons and flaps
Installing the aileron and flap servos
Installing the ailerons and flap linkages
Installing the main landing gear
Superlock air retracts
Secure the wing to the fuselage
Horizontal stabilizer installation
Installing the rudder pushrod
Installing the elevator pushrod
Installing the nose gear retract1
2
2
2
2
2
2
3
3
3
3
5
5
6
8
10
12
16
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Secure the fuselage
16
17
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Vertical stabilizer installation 18
19
22
24
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Cleaning the valve 45
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Installing the air valve 28
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Installing the fuel tank
Installing the engine
Installing the throttle
Mounting the cowl
Installing the spinner
Installing the receiver and battery
Installing the switch
For your radio installation
Basic connection for airplane
And adjustment of servos
Flight preparation pre flight check
Main gear dimensional detail
31
33
34
35
36
39
39
44
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Installing the electric motor ( ep version ) 39
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Balancing 42
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Lateral balance 42
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Control throws 42
44
46
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Nose gear dimensional detail 46
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Decoration 47
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Exploded view 48
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Exploded view 49
PC21 PILATUS MK2
PC21 PILATUS MK2
Instruction Manual
2
Phoenix Model guarantees the component parts in
this kit to be free from defects in both material and
workmanship at the date of purchase by the
purchaser.
This warranty does not cover cosmetic damage or
damage due to acts of God, accident, misuse,
abuse, negligence, commercial use, or modification
of or to any part of the Product.
This warranty does not cover damage due to
improper installation, operation, maintenance, or
attempted repair by anyone other than Phoenix
Model.
Further, Phoenix Model reserves the right to change
or modify this warranty without notice.
WARRANTY
Read this disclaimer carefully before using this
product. Please strictly follow the instruction manual
to assemble and use this.
In that Phoenix Model has no control over the final
assembly or material used for final assembly, Phoenix
Model is not responsible for loss of use , or other
incidental or consequential damages.
Furthermore, Phoenix Model cannot be held liable for
personal injury or property damage caused by the
use or misuse of Phoenix Model products. By the
act of using the user-assembled products, the user
accepts all resulting liability.
DISCLAIMER
Please trial fit all the parts. Make sure you have the
correct parts and that they fit and are aligned properly
before gluing! This will assure proper assembly. This
kit is hand made from natural materials, every plane
is unique and minor adjustments may have to be
made. However, you should find the fit superior and
assembly simple.
The painted and plastic parts used in this kit are
fuel proof. However, they are not tolerant of many
harsh chemicals including the following: paint thinner,
C/A glue accelerator, C/A glue debonder and
acetone. Do not let these chemicals come in contact
with the colors on the covering and the plastic parts.
Some parts included in this kit such as the cowl or
wheel pants are made of fiberglass, the fibers of
which may cause eye, skin and respiratory tract
irritation. Never blow into a part to remove fiberglass
dust, as the dust will blow back into your eyes.
Always wear safety goggles, a particle mask and
rubber gloves when grinding, drilling and sanding
fiberglass parts. Vacuum the parts and the work area
thoroughly after working with fiberglass parts.
IMPORTANT BUILDING NOTES
To avoid scratching your new airplane, do not
unwrap the pieces until they are needed for
assembly. Cover your workbench with an old towel or
brown paper, both to protect the aircraft and to
protect the table. Keep a couple of jars or bowls
handy to hold the small parts after you open the bag.
SUGGESTION
Always operate in open areas, away from factories,
hospitals, schools, buildings and houses etc.
NEVER fly your aircraft close to people or built up
areas.
NEVER fly near power lines, aerials or other
dangerous areas including airports, motorways etc.
NEVER fly in wet conditions or on windy or stormy
days.
ALWAYS adjust the engine from behind the
propeller, and do not allow any part of your body to
be in line with the propeller.
THE PROPELLER IS DANGEROUS Keep fingers,
clothing (ties, shirt sleeves, scarves) or any other
loose objects that could be caught or drawn in,
away from the propeller. Take care at ALL times.
NEVER use damaged or deformed propellers
or spinners.
Keep all onlookers (especially small children and
animals) well back from the area of operation. This
is a flying aircraft, which will cause serious injury in
case of impact with a person or animal.
DO NOT dispose of empty fuel containers on a fire,
this can lead to an explosion.
FLIGHT WARNINGS
This is not a toy and pilots must be over the age
of 14
Be sure that no other flyers are using your radio
frequency.
Do not smoke near fuel
Store fuel in a cool, dry place, away from children
and pets.
Wear safety glasses.
The glow plug clip must be securely attached to
the glow plug.
Do not flip the propeller with your fingers.
Keep loose clothing and wires away from the
propeller.
Do not start the engine if people are near. Do not
stand in line with the side of the propeller.
Make engine adjustments from behind the propeller
only. Do not reach around the spinning propeller.
Moisture causes damage to electronics. Avoid
water exposure to all equipment not specifically
designed and protected for this purpose.
SAFETY PRECAUTION
PC21 PILATUS MK2
Instruction Manual
3
When ready to fly, first extend the transmitter aerial.
Switch on the transmitter.
Switch on the receiver.
Check that the wings are correctly fitted to the
fuselage.
Operate the control sticks on the transmitter and
check that the control surfaces move freely and in
the CORRECT directions.
Check that the transmitter batteries have adequate
power.
ALWAYS take off into the wind.
If the model does not respond correctly to the
controls, land it as soon as possible and correct the
fault.
ALWAYS land the model INTO the wind, this ensures
that the model lands at the slowest possible speed.
Switch off the receiver.
Switch off the transmitter.
Empty the fuel tank after flying, fuel left in the tank
can cause corrosion and lead to engine problems.
A. GENERAL: A model aircraft is a non-human-carrying aircraft capable of sustained flight in the atmosphere. It may
not exceed limitations of this code and is intended exclusively for sport, recreation, education and/or competition.
All model flights must be conducted in accordance with this safety code and anyadditional rules specific to the
flying site.
1. Model aircraft will not be flown:
(a) In a careless or reckless manner.
(b) At a location where model aircraft activities are prohibited.
2. Model aircraft pilots will:
(a) Yield the right of way to all human-carrying aircraft.
(b) See and avoid all aircraft and a spotter must be used when appropriate. (AMA Document #540-D.)
(c) Not fly higher than approximately 400 feet above ground level within three (3) miles of an airport without notifying
the airport operator.
(d) Not interfere with operations and traffic patterns at any airport, heliport or seaplane base except where there is a
mixed use agreement.
(e) Not exceed a takeoff weight, including fuel, of 55 pounds unless in compliance with the AMA Large Model
Airplane program. (AMA Document 520-A.)
(f) Ensure the aircraft is identified with the name and address or AMA number of the owner on the inside or affixed
to the outside of the model aircraft. (This does not apply to model aircraft flown indoors.)
(g) Not operate aircraft with metal-blade propellers or with gaseous boosts except for helicopters operated under the
provisions of AMA Document #555.
(h) Not operate model aircraft while under the influence of alcohol or while using any drug that could adversely affect
the pilot’s ability to safely control the model.
(i) Not operate model aircraft carrying pyrotechnic devices that explode or burn, or any device which propels a
projectile or drops any object that creates a hazard to persons or property.
Exceptions:
• Free Flight fuses or devices that burn producing smoke and are securely attached to the model aircraft during
flight.
• Rocket motors (using solid propellant) up to a G-series size may be used provided they remain attached to the
model during flight. Model rockets may be flown in accordance with the National Model Rocketry Safety Code
but may not be launched from model aircraft.
Academy of Model Aeronautics National Model Aircraft Safety Code
Effective January 1, 2014
FLIGHT WARNINGS
Thin CA
30-minute epoxy
6-minute epoxy
Threadlocker thread locking cement
Mixing sticks
Mixing cups (GPMR8056)
Epoxy brushes
Denatured alcohol
Canopy Glue
Felt-tipped pen or pencil
Flat screwdriver
Adjustable wrench
Drill
Hobby knife
Masking tape
Phillips screwdriver (large)
Phillips screwdriver (small)
Ruler
Sandpaper
Soldering iron
Solder
Hex wrench
Drill bit: 1/16-inch (1.5mm), 5/64-inch (2mm),
1/8-inch (3,2mm), 3/16-inch (4,8mm),11/64-inch
(4.5mm), 13/64-inch (5,2mm), 1/4-inch (6,4mm)
ADHESIVES AND REQUIRED TOOLS
Top Flite® MonoKote® Sealing Iron
Top Flite Hot Sock Iron Cover
Top Flite MonoKote Trim Seal Iron
Top Flite MonoKote Heat Gun
COVERING TOOLS
PC21 PILATUS MK2
Instruction Manual
4
• Officially designated AMA Air Show Teams (AST) are authorized to use devices and practices as defined within
the Team AMA Program Document. (AMA Document #718.)
(j) Not operate a turbine-powered aircraft, unless in compliance with the AMA turbine regulations. (AMA Document
#510-A.)
3. Model aircraft will not be flown in AMA sanctioned events, air shows or model demonstrations unless:
(a) The aircraft, control system and pilot skills have successfully demonstrated all maneuvers intended or anticipated
prior to the specific event.
(b) An inexperienced pilot is assisted by an experienced pilot.
4. When and where required by rule, helmets must be properly worn and fastened. They must be OSHA, DOT,
ANSI, SNELL or NOCSAE approved or comply with comparable standards.
B. RADIO CONTROL (RC)
1. All pilots shall avoid flying directly over unprotected people, vessels, vehicles or structures and shall avoid
endangerment of life and property of others.
2. A successful radio equipment ground-range check in accordance with manufacturer’s recommendations will be
completed before the first flight of a new or repaired model aircraft.
3. At all flying sites a safety line(s) must be established in front of which all flying takes place. (AMA Document
#706.)
(a) Only personnel associated with flying the model aircraft are allowed at or in front of the safety line.
(b) At air shows or demonstrations, a straight safety line must be established.
(c) An area away from the safety line must be maintained for spectators.
(d) Intentional flying behind the safety line is prohibited.
4. RC model aircraft must use the radio-control frequencies currently allowed by the Federal Communications
Commission (FCC). Only individuals properly licensed by the FCC are authorized to operate equipment on
Amateur Band frequencies.
5. RC model aircraft will not knowingly operate within three (3) miles of any pre-existing flying site without a
frequency-management agreement. (AMA Documents #922 and #923.)
6. With the exception of events flown under official AMA Competition Regulations, excluding takeoff and landing, no
powered model may be flown outdoors closer than 25 feet to any individual, except for the pilot and the pilot's
helper(s) located at the flightline.
7. Under no circumstances may a pilot or other person touch an outdoor model aircraft in flight while it is still under
power, except to divert it from striking an individual.
8. RC night flying requires a lighting system providing the pilot with a clear view of the model’s attitude and
orientation at all times. Hand-held illumination systems are inadequate for night flying operations.
9. The pilot of an RC model aircraft shall:
(a) Maintain control during the entire flight, maintaining visual contact without enhancement other than by corrective
lenses prescribed for the pilot.
(b) Fly using the assistance of a camera or First-Person View (FPV) only in accordance with the procedures outlined
in AMA Document #550.
(c) Fly using the assistance of autopilot or stabilization system only in accordance with the procedures outlined in
AMA Document #560.
C. FREE FLIGHT
1. Must be at least 100 feet downwind of spectators and automobile parking when the model aircraft is launched.
2. Launch area must be clear of all individuals except mechanics, officials, and other fliers.
3. An effective device will be used to extinguish any fuse on the model aircraft after the fuse has completed its
function.
D. CONTROL LINE
1. The complete control system (including the safety thong where applicable) must have an inspection and pull test
prior to flying.
2. The pull test will be in accordance with the current Competition Regulations for the applicable model aircraft
category.
3. Model aircraft not fitting a specific category shall use those pull-test requirements as indicated for Control Line
Precision Aerobatics.
4. The flying area must be clear of all utility wires or poles and a model aircraft will not be flown closer than 50 feet
to any above-ground electric utility lines.
5. The flying area must be clear of all nonessential participants and spectators before the engine is started.
PC21 PILATUS MK2
Instruction Manual
5
PREPARATIONS
Use a covering iron with a covering sock on
high heat to tighten the covering if necessary.
Apply pressure over sheeted areas to
thoroughly bond the covering to the wood.
TEMPORARY PIN
TO KEEP HINGE
CENTERED
INSTALLING THE AILERONS AND FLAPS
1. Test fit the ailerons to the wing with the hinges.
If the hinges don’t remain centered, stick a pin
through the middle of the hinge to hold it in
position.
2. Apply six drops of thin CA to the top and bottom
of each hinge. Do not use CA accelerator. After
the CA has fully hardened, test the hinges by
pulling on the aileron.
Aileron
Flap
< Bottom view >
Main Wing
PC21 PILATUS MK2
Instruction Manual
6
Make certain the hinges are adequately secured with glue. If
they come loose in flight accidents may result.
Secure nylon hinges with instant glue, being careful
not to glue the wing and airleron together.
Apply instant glue (CA glue, super glue).
Align the center line of main wing with aileron.
INSTALLING THE AILERONs AND FLAPs
SERVOS
1. Install the rubber grommets and brass eyelets onto
the aileron servo.
2. Using a modeling knife, remove the covering from over
the pre-cut servo arm exit hole on the aileron servo
tray / hatch. This hole will allow the servo arm to pass
through when installing the aileron pushrods.
3. Place the servo into the servo tray. Center the servo
within the tray and drill pilot holes through the block
of wood for each of the four mounting screws
provided with the servo.
4. Using the thread as a guide and using masking tape,
tape the servo lead to the end of the thread:
carefully pull the thread out. When you have pulled
the servo lead out, remove the masking tape and
the servo lead from the thread.
5. Place the aileron servo tray / hatch into the servo box
on the bottom of the wing and drill pilot holes
through the tray and the servo box for each of the
four mounting screws. Secure the servo tray in
place using the mounting screws provided .
6. Repeat step # 2 - # 5 to install the second aileron
servo in the opposite wing half.
Aileron
Flap
Assemble left and right
sides the same way
PC21 PILATUS MK2
Instruction Manual
7
2 x 10mm TP Screw
16
approx. 13mm
2mm
1.5mm
1.5mm
Aileron and Flap Servo
Set all scerws securely. If they
come off during flight you will
lose control of your aircraft!
Warning!
2x10mm
2x10mm
2x10mm
2x10mm
Supplied with the servo
Cut away film only. here
Must be purchased
separately!
Assemble left and right
sides the same way
Cut off shaded portion
Pull out servo cord with string.
Pay close attention
Assemble left and right
sides the same way
Cut off shaded portion
2. Attach the clevis to the outer hole in the control
horn and secure it.
3. Locate one nylon servo arm, and using wire
cutters, remove all but one of the arms. Using a
2mm drill bit, enlarge the third hole out from the
center of the arm to accommodate the aileron
pushrod wire.
4. Plug the aileron servo into the receiver and center
the servo. Install the servo arm onto the servo.
The servo arm should be perpendicular to the
servo and point toward the middle of the wing.
5. Center the aileron and hold it in place using a
couple of pieces of masking tape.
6. With the aileron and aileron servo centered,
carefully place a mark on the aileron pushrod wire
where it crosses the hole in the servo arm.
7. Using pliers, carefully make a 90 degree bend
down at the mark made. Cut off the excess wire,
leaving about 6mm beyond the bend.
8. Insert the 90 degree bend down through the hole in
the servo arm. Install one nylon snap keeper over
the wire to secure it to the arm. Install the servo
arm retaining screw and remove the masking tape
from the aileron.
9. Repeat step # 4 - # 8 to install the second aileron
linkage. After both linkages are completed,
connect both of the aileron servo leads using a
Y-harness you have purchased separately.
1. Working with the aileron linkage for now, thread
one nylon clevis onto one of the threaded wires.
INSTALLING THE AILERONs AND FLAPs
LINKAGES
3 x 25mm Cap Screw
4
4
4
4
2 x 10mm Screw
PC21 PILATUS MK2
Instruction Manual
8
3x25mm
Cut away film only. here
Pull out servo cord with string.
Nut
2mm
4
4
Snap keeper
4
4
1.7x180mm Push rod
PC21 PILATUS MK2
Instruction Manual
9
Pull out servo cord with string.
Aileron Rod
Aileron
Flap Rod
Flap
2x10mm
2mm
Neutral
6mm
Bend 90
Mark the spot to attach.
Cut off excess.
Apply threadlocker
(screw cement).
Assemble left and right
sides the same way
PC21 PILATUS MK2
Instruction Manual
10
< Left Wing >< Right Wing >
INSTALLING THE MAIN LANDING GEAR
< For Left > < For Right >
Assemble left and right
sides the same way
Apply threadlocker
(screw cement).
5x45mm
5mm
10x3mm
4x4mm
5x45mm Cap Screw
2
2
2
8
8
8
8
4x4mm Set Screw
4mm Washer
2
5mm Washer
4mm Spring Washer
4x20mm Cap Screw
3x8mm Button Screw
10x3mm Aluminum
2
5x30mm Spring
PC21 PILATUS MK2
Instruction Manual
11
Assemble left and right
sides the same way
Air Hose
Spring
Air Hose
PC21 PILATUS MK2
Instruction Manual
12
Air Hose
Spring
Air Hose
SUPERLOCK AIR RETRACTS
VALUE ONE WAY
3 WAY
CONNECTOR
VALVE CONTROL
AIR TANK
SERVO
4 WAY CONNECTOR
4 WAY
CONNECTOR
MAIN GEAR
NOSE GEAR
MAIN GEAR
AIR PUMP
AIR SUPPLY
7kg/cm
2
PC21 PILATUS MK2
Instruction Manual
13
3x8mm
3x8mm
Assemble left and right
sides the same way
7mm
PC21 PILATUS MK2
Instruction Manual
14
Assemble left and right
sides the same way
< Wheel well >
Cut off shaded portion
Pay close attention here!
Pull out servo cord with string.
Apply epoxy glue
PC21 PILATUS MK2
Instruction Manual
15
4x20mm
4mm
4mm
4x20mm
Assemble left and right
sides the same way
Pull out servo cord with string.
PC21 PILATUS MK2
Instruction Manual
16
SECURE The Wing To The Fuselage
Attach the wings to the fuselage and secure the
wing panels.
SECURE The Fuselage
1. Trim the circular areas of covering over each wing
screw.
2. Loosen each screw approximately 4mm. (It is not
necessary, nor recommended, to completely
remove the wing screws.)
3. Trim the covering from the slots for the wing
alignment spares on each side of the top of the
fuselage.
4. Slide the wings into the fuselage. Once flush adjust
the wing screws as necessary and tighten once in
position.
Assemble left and right
sides the same way.
Using the 2 aluminum tube (Ф 19mm - L345mm)
and 1 aluminum tube (Ф 19mm - L252mm) to
secure the fuselage.
PC21 PILATUS MK2
Instruction Manual
17
Assemble left and right
sides the same way.
6. When you are sure that everything is aligned
correctly, mix up a generous amount of 30 minute
epoxy. Apply a thin layer to the top and bottom of
the stabilizer mounting area and to the stabilizer
mounting platform sides in the fuselage. Slide
the stabilizer in place and re-align. Double check
all of your measurements one more time before
the epoxy cures. Remove any excess epoxy using
a paper towel and rubbing alcohol and hold the
stabilizer in place with T-pins or masking tape.
7. After the epoxy has fully cured, remove the
masking tape or T-pins used to hold the stabilizer
in place and carefully inspect the glue joints. Use
more epoxy to fill in any gaps that were not filled
previously and clean up the excess using a paper
towel and rubbing alcohol.
5. Remove the stabilizer. Using the lines you just
drew as a guide, carefully remove the covering
from between them using a modeling knife.
When cutting through the covering to remove it, cut
with only enough pressure to only cut through the
covering it's self. Cutting into the balsa structure
may weaken it. This could lead to possible failure
during flight.
HORIZONTAL STABILIZER INSTALLATION
1. Using a modeling knife, cut away the covering
from the fuselage for the stabilizer and remove it.
2. Draw a center line onto the horizontal stabilizer.
3. Check the fit of the horizontal stabilizer in its slot.
Make sure the horizontal stabilizer is square and
centered to the fuselage by taking measurements,
but don't glue anything yet.
4. With the horizontal stabilizer correctly aligned, mark
the shape of the fuselage on the top and bottom of
the tail plane using a water soluble /
non-permanent felt-tip pen.
8. Installing the elevator using C.A glue as installing
the aileron.
Make certain plane is aligned accurately
per the diagram. A mis-aligned plane can
fly erraticaliy and cause accidents.
Warning!
Apply instant glue
(CA glue, super glue).
Cut off shaded portion
Ensure smooth, non-binding
movement when assembling.
Secure nylon hinges with instant glue, being
careful
horizontal fin and elevator.
Align the center line of horizontal fin with elevator.
PC21 PILATUS MK2
Instruction Manual
18
Apply instant glue
(CA glue, super glue).
VERTICAL STABILIZER INSTALLATION
Installing the rudder using C.A glue as
installing the aileron.
Secure nylon hinges with instant glue, being
careful vertical fin and rudder.
Align the center line of vertical fin with rudder.
Ensure smooth, non-binding
movement when assembling.
PC21 PILATUS MK2
Instruction Manual
19
INSTALLING THE RUDDER PUSHROD
1. Locate the pushrod exit slot on the left side of the
fuselage.
2. Carefully cut away the covering material from the
slot.
3. Working from inside the fuselage, slide the threaded
end of the remaining pushrod down the inside of the
fuselage until the pushrod reaches the exit slot.
Carefully reach in with a small screw driver and
guide the pushrod out of the exit slot.
4. Install the nylon clevis on the rudder pushrod. Make
sure 6mm of thread shows inside the clevis.
5. The control horn should be mounted on the left side
of the rudder.
6. Attach nylon clevis to the control horn.
7. Locate one nylon servo arm, and using wire cutters,
remove all but one of the arms using a 2mm drill bit,
enlarge the third hole out from the center to
accommodate the rudder pushrod wire.
8. Plug the rudder servo into the receiver and center
the servo. Install the servo arm onto the servo.
9. Center the rudder and hold it in place using a piece
of masking tape.
10. With the rudder and rudder servo centered,
carefully place a mark on the rudder pushrod wire
where it crosses the hole in the servo arm.
11. Using a pliers, carefully make a 90 degree bend
up at the mark made. Cut off excess wire, leaving
about 6mm beyond the bend.
12. Insert the 90 degree bend up through the hole in
the servo arm. Install one nylon snap keeper over
the wire to secure it to the arm. Install the servo
arm retaining screw and remove the masking tape
from the rudder.
13.Using thick CA glue, secure the pushrod sleeves to
the pushrod sleeve guide.
2 x 10mm Screw
3 x 25mm Cap Screw
1
1
1
1
2mm Nut
1
1
Snap keeper
1
1
1.7x600mm Push rod
90 Degree
PC21 PILATUS MK2
Instruction Manual
20
2x10mm
2mm
3x25mm
Apply threadlocker
(screw cement).
3x25mm
Cut off shaded portion
Assemble left and right
sides the same way.
2x10mm
2mm
Wood
Apply instant glue
(CA glue, super glue).
PC21 PILATUS MK2
Instruction Manual
21
Set all screws securely. If they
come off during flight you will
lose control of your aircraft!
Hatch
Open and close
Rudder Servo
Cut off shaded portion
Must be purchased separately!
Rudder Rod
Pay close attention here
Mark the spot to attach.
Cut off excess.
PC21 PILATUS MK2
Instruction Manual
22
INSTALLING THE ELEVATOR PUSHROD
1. Locate the pushrod exit slot on the right side and left
side of the fuselage. It is located slightly ahead and
below the horizontal stabilizer.
2. Carefully cut away the covering material from the slot.
3. Working from inside the fuselage, slide the threaded
end of the pushrod until it reaches the exit slot.
Carefully reach in with a small screw driver and
guide the pushrod out of the exit slot.
4. Install the nylon clevis into the two elevator pushrod.
Make sure 6mm of thread shows inside the clevis.
5. The control horn should be mounted on the bottom,
left side and right side of the elevator
.
6. Remove the covering from the slot on the elevator.
Insert and secure the control horn in place.
7. Attach nylon clevis to the control horn and secure it .
8. Locate one nylon servo arm, and using wire cutters,
remove all but one of the arms. Using a 2mm drill
bit, enlarge the third hole out from the
center to
accommodate the elevator pushrod wire.
9. Plug the elevator servo into the receiver and center
the servo. Install the servo arm onto the servo. The
servo arm should be perpendicular to the servo and
point toward the middle of the fuselage.
10. With the elevator halves and elevator servo
centered, carefully place a mark on the elevator
pushrod wire where it crosses the hole in the servo
arm.
11. Using pliers, carefully make a 90 degree bend up at
the mark made. Cut off the excess wire, leaving
about 6mm beyond the bend.
12. Make the same way for the second elevator.
2 x 10mm Screw
3 x 20mm Cap Screw
2
2
2
2
2mm Nut
2
2
Snap keeper
2
2
1.7x600mm Push rod
3x20mm
2mm
2x10mm
3x20mm
Apply threadlocker
(screw cement).
Cut off shaded portion
Assemble left and right
sides the same way.
2x10mm
2mm
PC21 PILATUS MK2
Instruction Manual
23
approx. 13mm
Elevator Servo
Elevator Servo
Elevator Servo
Rudder Servo
Cut off shaded portion
Must be purchased separately!
Pay close attention here
Mark the spot to attach.
Cut off excess.
PC21 PILATUS MK2
Instruction Manual
24
INSTALLING THE NOSE GEAR RETRACT
2
2
2
3mm Washer
5x45mm
5mm
10x3mm
4x4mm
Hatch
Open and close
Apply threadlocker
(screw cement).
Aluminum ball
2
4
1
500mm Cable rod
3x30mm Connector
Locknut
1
5x30mm Spring
Apply instant glue
(CA glue, super glue).
Cut off shaded portion
3 x 12mm Screw
2
3mm Nylon Nut
2
5 x 45mm Cap Screw
1
1
1
4
4
4x4mm Set Screw
4mm Washer
1
5mm Washer
4mm Spring Washer
4
4 x 20mm Cap Screw
10x3mm Aluminum
PC21 PILATUS MK2
Instruction Manual
25
Air Hose
Spring
Air Hose
Air Hose
Spring
Air Hose
PC21 PILATUS MK2
Instruction Manual
26
Crimp
Cable rod
4x20mm
4mm
4mm
4x20mm
PC21 PILATUS MK2
Instruction Manual
27
3mm
Cable rod
Aluminum ball
3x12mm
3x12mm
3mm
3mm
3mm
3mm
Servo nose gear retract
Nut
Servo nose gear retract
Must be purchased
separately!
Cut off shaded portion
Pay close attention here
Cut off excess.
PC21 PILATUS MK2
Instruction Manual
28
INSTALLING THE AIR VALVE
IMPORTANT SUGGESTION
Please note that you must use the high torque
servo for controlling the air valve. The
minimum torque of servo is 7kg.
Before installing the air valve, please test the
valve how does it work. If it doesn’t move
smoothly, please clean the air valve as showing
at the end of the manual.
Nylon Strap
Loosen nut.
Tighten firmly.
Connector
1
Control Valve
Retract Control Valve
4 Way connector
3 Way connector
3.8x3500mm Air Hose
Air Tank
1.7x70mm Push Rod
1
1
2
1
1
1
1
Zip Tie
2
Apply threadlocker (screw cement).
Ensure smooth, non-binding movement
when assembling
PC21 PILATUS MK2
Instruction Manual
29
Air Hose
Air Hose
Air Hose
Air flow direction.
Use linkage to push the piston in all the way.
Keep the piston inside the - marked area.
8-10mm
PC21 PILATUS MK2
Instruction Manual
30
Air Hose
Air Hose
Air tank
Zip Tie
Zip tie
Air tank
Must be purchased separately!
PC21 PILATUS MK2
Instruction Manual
31
!
1. The stopper has been pre-assembled at the
factory.
2. Using a modeling knife, cut one length of silicon
fuel line (the length of silicon fuel line is
calculated by how the weighted clunk should
rest about 5mm away from the rear of the tank
and move freely inside the tank). Connect one
end of the line to the weighted clunk and the
other end to the nylon pick up tube in the
stopper.
3. Carefully bend the second nylon tube up at a 45
degree angle (using a cigarette lighter). This
tube will be the vent tube to the muffler.
4. Carefully bend the third nylon tube down at a 45
degree angle (using a cigarette lighter). This
tube will be vent tube to the fueling valve.
When the stopper assembly is installed in the
tank, the top of the vent tube should rest just
below the top surface of the tank. It should not
touch the top of the tank.
5. Test fit the stopper assembly into the tank. It
may be necessary to remove some of the
flashing around the tank opening using a
modeling knife. If flashing is present, make
sure none of it falls into the tank.
INSTALLING THE Fuel Tank
!
6. When satisfied with the alignment of the stopper
assembly tighten the 3mm x 20mm machine
screw until the rubber stopper expands and
seals the tank opening. Do not over tighten the
assembly as this could cause the tank to split.
7. Using a modeling knife, cut 3 lengths of fuel line
. Connect 2 lines to the 2 vent tubes and 1 line
to the fuel pickup tube in the stopper.
8. Feed three lines through the fuel tank
compartment and through the pre-drilled hole in
the firewall. Pull the lines out from behind the
engine, while guiding the fuel tank into place.
Push the fuel tank as far forward as possible,
the front of the tank should just about touch the
back of the firewall.
Blow through one of the lines to ensure the fuel
lines have not become kinked inside the fuel
tank compartment. Air should flow through
easily.
Do not secure the tank into place permanently
until after balancing the airplane. You may
need to remove the tank to mount the battery in
the fuel tank compartment.
9. Secure the fuel tank.
Air tank
Air valve Servo
(for retract gear)
Zip Tie
Zip Tie
PC21 PILATUS MK2
Instruction Manual
32
Foam ring
# 6
Zip tie
Silicone Tube
Fuel Tank
Must be purchased separately!
Fuel Tank
Zip tie
Clunks
1
PC21 PILATUS MK2
Instruction Manual
33
May be you also need to trim some
wood from the tri-angle wood for
the installation is easy.
5mm Washer
4
4
5mm Spring Washer
16x20mm Aluminum
4
2mm
2mm
Silicone
Silicone
12x45mm Aluminum
4
5x100mm Cap Screw
4
INSTALLING THE ENGINE
DLE 35 CC
DLE 35 CC
5x100mm
5x100mm
5mm
5mm
12x45mm
16x20mm
165mm
Must be purchased separately!
PC21 PILATUS MK2
Instruction Manual
34
Silicone
Throttle Lever
Choke Lever
Silicone
INSTALLING THE THROTTLE
1.
Plug the throttle servo into the receiver and turn on
the radio system. Check to ensure that the throttle
servo output shaft is moving in the correct
direction. When the throttle stick is moved forward
from idle to full throttle, the throttle barrel should
also open and close using this motion. If not,
reverse the direction of the servo, using the
transmitter.
Connector
1
Apply threadlocker (screw cement).
Ensure smooth, non-binding movement
when assembling
Throttle Servo
Cut off shaded portion
Must be purchased separately!
4x4mm
Adjust the throttle input (transmitter throttle stick),
throttle trim movement and the carburattor opening
to the suitable position and screw in the 4x4mm set screw.
PC21 PILATUS MK2
Instruction Manual
35
< Throttle Idling >
approx. 1mm
Carburetor
Throttle Servo
Throttle position of Tx.
< Throttle Hi > < Throttle Stop >
MOUNTING THE COWL
1. Remove the muffler and needle valve assembly
from the engine. Slide the fiberglass cowl over
the engine.
2. Measure and mark the locations to be cut out
for engine head clearance, needle valve,
muffler. Remove the cowl and make these
cutouts using a rotary tool with a cutting disc
and a rotary sanding drum attachment.
3. Slide the cowl back into place. Align the front of
the cowl with the crankshaft of the engine. The
front of the cowl should be positioned so the
crankshaft is in the middle of the precut
opening. Hold the cowl firmly in place using
several pieces of masking tape.
4. While holding the cowl firmly in position, drill
four 1,6mm pilot holes through both the cowl
and the side edges of the firewall.
5. Using a 3mm drill bit, enlarge the holes in the
cowling.
Enlarging the holes through the cowl will prevent
the fiberglass from splitting when the mounting
screws are installed.
6. Slide the cowl back over the engine and secure it
in place using screws.
7. Install the muffler. Connect the fuel and pressure
lines to the carburator, muffler and fuel filler
valve. Tighten the screws completely.
!
3 x 15mm TP Screw
Trim the cowling so it will
match your engine
Washer
5mm
Cut off shaded portion
PC21 PILATUS MK2
Instruction Manual
36
3x15mm
3x12mm TP Screw
3
INSTALLING THE SPINNER
Install the spinner back-plate, propeller and
spinner cone.
The propeller should not touch any part of the
spinner cone. If it dose, use a sharp modeling
knife and carefully trim away the spinner cone
where the propeller comes in contact with it.
!
Use the spacer
suitable for a shaft.
Propeller
Spinner
Spinner
Must be purchased
separately!
3x12mm
PC21 PILATUS MK2
Instruction Manual
37
OS 1.20
6mm
6mm
Engine Mount
May be you also need to trim
some wood from the tri-angle
wood for the installation is easy.
4x50mm
4mm
16x20mm
16x20mm
4mm
4x50mm
Mount Nut
4mm Washer
4mm Spring Washer
4
4
8
4 x 50mm Cap Screw
Nut
4 x 30mm Screw
4mm
4
8
4
4mm Mount Nut
1
1
1.2x500mm Throttle rod
300mm PP Pipe
PC21 PILATUS MK2
Instruction Manual
38
Must be purchased
separately!
OS 1.20
Cut off shaded portion
Throttle Servo
4x30mm
4mm
4mm
4mm
4mm
Throttle rod
3x15mm
165mm
PC21 PILATUS MK2
Instruction Manual
39
INSTALLING THE SWITCH
1. The switch should be mounted on the fuselage
side, opposite the muffler, close enough to the
receiver so the lead will reach. Use the face plate
of the switch cut out and locate the mounting
holes.
2. Cut out the switch hole using a modeling knife.
Use a 2mm drill bit and drill out the two mounting
holes through the fuselage side.
3. Secure the switch in place using the two machine
screws provided with the radio system.
!
INSTALLING THE RECEIVER AND BATTERY
1. Plug the servo leads and the switch lead into the
receiver. You may want to plug an aileron
extension into the receiver to make plugging in the
aileron servo lead easier when you are installing
the wing. Plug the battery pack lead into the
switch.
2. Wrap the receiver and battery pack in the protective
foam to protect them from vibration. Use a rubber
band or masking tape to hold the foam in place.
Do not permanently secure the receiver and battery
until after balancing the model.
Foam Pad
Tape
Battery
for Receiver
Foam Pad
Tape
Battery
for Engine
Foam Pad
Tape
Battery
for Receiver
Switch
Off
On
Off
On
Must be purchased
separately!
INSTALLING THE ELECTRIC MOTOR ( EP VERSION )
5mm Washer
4 x 35mm Cap Screw
10x15mm Aluminum
4
12
4
4mm Washer
4
4
4mm Spring Washer
White glue
4x35mm
4mm
4mm
4x35mm
5mm
10x15mm
Must be purchased
separately!
PC21 PILATUS MK2
Instruction Manual
40
Must be purchased
separately!
5x100mm
5x100mm
5mm
5mm
12x45mm
5mm
16x20mm
Electric Speed Controller
Velcro
Battery
Apply threadlocker
(screw cement).
PC21 PILATUS MK2
Instruction Manual
41
When rotating clock wise, change the
connection of 2 wires.
< Check the motor rotation >
Top Hatch
Open and close
PC21 PILATUS MK2
Instruction Manual
42
3. If the nose of the plane falls, the plane is nose
heavy. To correct this first move the battery pack
further back in the fuselage. If this is not possible
or does not correct it, stick small amounts of lead
weight on the fuselage under the horizontal
stabilizer. If the tail of the plane falls, the plane is
tail heavy. To correct this, move the battery and
receiver forward or if this is not possible, stick
weight into the firewall. When balanced correctly,
the airplane should sit level or slightly nose down
when you lift it up with your fingers.
BALANCING
1. It is critical that your airplane be balanced correctly.
Improper balance will cause your plane to lose
control and crash.
THE CENTER OF GRAVITY IS LOCATED 166mm
(6.5 in) BACK FROM THE LEADING EDGE OF
THE WING, AT THE FUSELAGE. BALANCE A
PLANE UPSIDE DOWN WITH THE FUEL TANK
EMPTY.
2. Mount the wing to the fuselage. Using a couple of
pieces of masking tape, place them on the top
side of the wing 166mm (6.5 in) back from the
leading edge, at the fuselage sides.
CONTROL THROWS
1. We highly recommend setting up a plane using
the control throws listed.
2. The control throws should be measured at the
widest point of each control surface.
3. Check to be sure the control surfaces move in
the correct directions.
!
LATERAL BALANCE
After you have balanced a plane on the C.G.
You should laterally balance it. Doing this will
help the airplane track straighter.
1. Turn the airplane upside down. Attach one loop
of heavy string to the engine crankshaft and
one to the tail wheel wire. With the wings level,
carefully lift the airplane by the string. This may
require two people to make it easier.
2. If one side of the wing fall, that side is heavier
than the opposite. Add small amounts of lead
weight to the bottom side of the lighter wing
half's wing tip. Follow this procedure until the
wing stays level when you lift the airplane.
Aileron 13mm up 13mm down
Elevator 13mm up 13mm down
Rudder 30mm right 30mm left
Flap 25mm down
Aileron 16mm up 16mm down
Elevator 16mm up 16mm down
Rudder 40mm right 40mm left
Flap 35mm down
HIGH RATE
LOW RATE
166mm
(6.5 in)
PC21 PILATUS MK2
Instruction Manual
43
Elevator Control
Aileron Control
13mm
13mm
Rudder Control
30mm
30mm
Flap Control
25-35mm
13mm
13mm
PC21 PILATUS MK2
Instruction Manual
44
FLIGHT PREPARATION PRE FLIGHT CHECK
1. Completely charge your transmitter and receiver
batteries before your first day of flying.
2. Check every bolt and every glue joint in your
plane to ensure that everything is tight and well
bonded.
3. Double check the balance of the airplane
4. Check the control surface
5. Check the receiver antenna . It should be fully
extended and not coiled up inside the fuselage.
6. Properly balance the propeller.
BASIC CONNECTION FOR AIRPLANE AND ADJUSTMENT OF SERVOS
FOR YOUR RADIO INSTALLATION
Example of connection
For more information, refer to radio system instruction manual.
Follow instruction manual of Engine and Battery.
Flap Servo
Y-Harness
Y-Harness
Y-Harness
Switch
Receiver
Engine
Throttle Servo
Battery (Receiver)
Flap Servo
Flap
Flap
Rudder
Steering nose
Elevator Servo
Elevator
Elevator Servo
Nose retract
Elevator
Aileron Servo
Aileron Servo
Aileron
Aileron
Rudder Servo
Air Valve Servo
(For Retract Gear)
PC21 PILATUS MK2
Instruction Manual
45
Pull our the piston
Steps 1:
Steps 2:
Clean the old GREASE
using tissue.
Cleaning the valve
Cleaning the valve: In case the valve can not
move smoothly, please follow these steps as
below.
Steps 4:
Insert the piston into the valve.
Steps 3:
Apply the new GREASE (Grease is not included
with the kit).
Please note that you must use the high torque
servo for controlling the air valve. The minimum
torque of servo is 7kg.
Must be purchased
separately!
PC21 PILATUS MK2
Instruction Manual
46
30.0
35.0
30.0
35.0
120.0
150.0
150.0
22.0
22.0
Main Gear Dimensional Detail
Nose Gear Dimensional Detail
90°
PC21 PILATUS MK2
Instruction Manual
47
DECORATION
< Top view >
< Bottom view >
<Side view> Left
<Side view> Right
3x15mm(TP)
R 90mm
75mm
4x20mm
4mm
3x8mm
3x8mm
4x20mm
4mm
75mm
4x20mm
4mm
4x20mm
3x8mm
3x8mm
4mm
2mm
2mm
2x10mm
4x4mm
4x35mm
4mm
5mm
10x15mm
5x100mm
5mm
5mm
5mm
12x45mm
16x20mm
Mount Nut
4x50mm
4x50mm
4x30mm
4mm
4mm
4mm
Mount Nut
1.2x500mm
300mm
3x12mm
48
EXPLODED VIEW
Wood
49
EXPLODED VIEW
# 6
3x25mm
3x25mm
2x10mm(TP)
2x10mm(TP)
3x25mm
3x25mm
2x10mm(TP)
3x20mm
3x20mm
3x25mm
2mm
2mm
2mm
2mm
2mm
2mm
2mm
2x10mm(TP)
4x20mm
65mm
4mm
4x20mm
4mm
3mm
3x12mm
3mm
3x12mm
Wood
2mm
2x10mm
2mm
2x10mm
2mm
2x10mm
2mm
2x10mm
2mm
2x10mm
2mm
2x10mm
2mm
2x10mm
I/C FLIGHT WARNINGS
Always operate in open areas, away
from factories, hospitals, schools,
buildings and houses etc. NEVER fly
your aircraft close to people or built
up areas.
THE PROPELLER IS DANGEROUS
Keep fingers, clothing (ties, shirt
sleeves, scarves) or any other loose
objects that could be caught or drawn
in, away from the propeller. Take care
at ALL times.
Keep all onlookers (especially small
children and animals) well back from
the area of operation. This is a flying
aircraft, which will cause serious
injury in case of impact with a person
or animal.
NEVER fly near power lines, aerials
or other dangerous areas including
airports, motorways etc.
NEVER use damaged or deformed
propellers or spinners.
DO NOT dispose of empty fuel
containers on a fire, this can lead to
an explosion.
NEVER fly in wet conditions or on
windy or stormy days.
ALWAYS adjust the engine from
behind the propeller, and do not allow
any part of your body to be in line
with the propeller.
I/C FLIGHT GUIDELINES
Made in Vietnam
When ready to fly, first extend the
transmitter aerial.
Operate the control sticks on the
transmitter and check that the control
surfaces move freely and in the
CORRECT directions.
ALWAYS land the model INTO the
wind, this ensures that the model lands
at the slowest possible speed.
Switch on the transmitter.
Switch off the transmitter.
Check that the transmitter batteries
have adequate power.
Switch off the receiver.
Switch on the receiver.
ALWAYS take off into the wind.
Check that the wings are correctly
fitted to the fuselage.
If the model does not respond correctly
to the controls, land it as soon as
possible and correct the fault.
Empty the fuel tank after flying, fuel left
in the tank can cause corrosion and
lead to engine problems.
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