Instruction Manual
GP
version
EP
version
SPECIFICATION
- Wingspan: 1684mm (66.3 in)
- Length: 1605mm (63.1 in)
- Flying weight: 4700-5200 gr
- Wing area: 54.7 dm2
- Wing loading: 87g/dm2
- Wing type: Naca airfoils
- Covering type: Genuine ORACOVER®
- Gear type: Aluminum Hi-grade for main
gear and spring wire for tail gear (included)
- Spinner size: Plastic 70mm (included)
- Radio: 4 channel minimum (not included)
- Servo: 6 standard hitorque servo: 2 aileron;
2 elevator; 1 rudder; 1 throttle (not included)
- Recommended receiver battery:
4.8-6V / 1200-2000mAh NiMH (not included)
- Servo mount: 21mm x 42 mm
- Propeller: suit with your engine
- Engine: .120 / 2-stroke or .120/4-stroke glow
engine or 20cc gas engine (not included)
- Motor: brushless outrunner 2000-2400 W,
450 KV (not included)
- Gravity CG: 137 mm (5.3in) Back from the
leading edge of the wing, at the fuselage
- Control throw Ailerons: Low: 11mm up/down,
10% expo; High: 13mm up/down, 10% expo
- Control throw Elevators: Low: 11mm up/down,
12% expo; High: 13mm up/down, 12% expo
- Control throw Rudder: Low: 35mm right/left,
15% expo; High: 60mm right/left, 15% expo
- Experience level: Intermediate
- Plane type: Scale Aerobatic
RECOMMENDED MOTOR AND BATTERY SET UP
- Motor: RIMFIRE .120 (not included)
- Lipo cell: 6-12 cells / 4000 – 5500mAh
(not included)
- Esc: 80-100A (not included)
YAK54 MK2
GP/EP size.120/20cc SCALE 1:4 ¾ ARF
TOOLS AND SUPPLIES NEEDED.
• Medium C/A glue
• 30 minute epoxy
• 6 minute epoxy
• Hand or electric drill
• Assorted drill bits
• Modeling knife
• Straight edge ruler
• 2 bender plier
• Wire cutters
• Masking tape
• Thread lock
• Paper towels
• Rubbing alcohol
SUGGESTION
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.
NOTE:
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. The
YAK54 MK2 GP/EP size.120/20cc SCALE 1:4 ¾
ARF 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.
SAFETY PRECAUTION:
• This is not a toy
• 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.
Instruction Manual
3x12mm
Cable
3x25mm
3x20mm
TOOLS AND SUPPLIES NEEDED.
• Medium C/A glue
• 30 minute epoxy
• 6 minute epoxy
• Hand or electric drill
• Assorted drill bits
• Modeling knife
• Straight edge ruler
• 2 bender plier
• Wire cutters
• Masking tape
• Thread lock
• Paper towels
• Rubbing alcohol
SUGGESTION
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.
NOTE:
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. The
YAK54 MK2 GP/EP size.120/20cc SCALE 1:4 ¾
ARF 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.
SAFETY PRECAUTION:
• This is not a toy
• 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.
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.
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.
TEMPORARY PIN
TO KEEP HINGE
CENTERED
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.
1
YAK54 MK2
Instruction Manual
< Bottom view >
Main Wing
Aileron
2
YAK54 MK2
Instruction Manual
INSTALLING THE AILERONs SERVOS
1. Install the rubber grommets and brass eyelets onto
the aileron servo.
2. Using a modeling knife, remove the covering from over
the servo box.
3. Place the servo into the servo box. Center the servo
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. Repeat step # 2 - # 5 to install the second aileron
servo in the opposite wing half.
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.
Cut away film only. here
Supplied with the servo
2mm
Must be purchased
separately!
Assemble left and right
sides the same way
Cut off shaded portion
Set all scerws securely. If they come off during
flight you will lose control of your aircraft!
Tie the string.
Pull out servo
cord with string.
Warning!
Aileron
Aileron
D
D
YAK54 MK2
Instruction Manual
3
Cut off shaded portion
Assemble left and right
sides the same way
Nut
3mm
6
< Bottom view >
3 x 25mm Cap Screw
2
85mm Push rod
2
2
2
2
3 x 12mm Screw
Aileron
Aileron
INSTALLING THE AILERON LINKAGES
1. Install the control horn into the aileron.
2. Locate the metal rod wire, screw the plastic link ball
onto the threaded end of the wire. Tighten the nut
against, and then install the metal M3 clevis to the
other side of the pushrod wire.
3. 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.
4. Center the aileron and hold it in place using a
couple of pieces of masking tape. Adjust the
linkage until the aileron and the servo arm are
both centered and then tighten the nut against.
Remember use thread locking compound to
secure.
5. Repeat step 1 - step 4 for the second aileron
linkage.
YAK54 MK2
Instruction Manual
4
< Bottom view >
Apply threadlocker
(screw cement).
SECURE The Wing To The Fuselage
Attach the wings to the fuselage and secure the
wing panels using 4 plastic screw.
Cut off shaded portion
Assemble left and right
sides the same way
Aileron
Aileron
Neutral
Aileron Rod
6x45mm
6x45mm Plastic Screw
4
Aileron Rod
3x12mm
Aluminum ball
Silicone tube
INSTALLING THE MAIN LANDING GEAR
Assemble left and right
sides the same way
Cut off shaded portion
4mm Washer
5mm Washer
4mm Spring Washer
4 x 20mm Cap Screw
4
YAK54 MK2
Instruction Manual
5
Apply threadlocker
(screw cement).
< Main Gear (R) > < Main Gear (L) >
Collar
Collar
Washer
Washer
Nut
Nut
Wheel
Wheel Pant
Main gear
Collar
Collar
Washer
Nut
Nut
2
Collar
8
4
8
2
4
4
YAK54 MK2
Instruction Manual
6
4mm
5mm
4x20mm
HORIZONTAL STABILIZER INSTALLATION
1. Using a modeling knife, cut away the covering
from the fuselage for the stabilizer and remove it.
2. Remove the covering from the stabilizer.
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.
3. Attach the wing to the fuselage as picture.
4. Test the position of the elevator and adjust it as
shown.
5. When you are sure that everything is aligned
correctly, mix up a generous amount of 30 minute
epoxy. Apply a thin layer to the bottom and to the
top of the stabilizer mounting area and to the
stabilizer mounting platform sides in the fuselage.
Insert 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.
6. 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.
7. Repeat step 1 - step 2 from the installing aileron for
the installing elevator.
VERTICAL STABILIZER INSTALLATION
Installing the rudder using C.A glue as
installing the aileron.
Align the center line of vertical fin with rudder.
Secure nylon hinges with instant glue, being
careful vertical fin and rudder.
YAK54 MK2
Instruction Manual
7
Align the center line of horizontal tail
with elevator.
Cut away film only here
Secure nylon hinges with instant glue,
being careful tail wing and elevator.
Make certain plane is aligned
accurately per the diagram.
A mis-aligned plane can fly
erraticaliy and cause accidents.
Warning!
Cut off shaded portion
Apply epoxy glue
Apply epoxy glue
Apply instant glue
(CA glue, super glue).
90 Degree
YAK54 MK2
Instruction Manual
8
3x12mm Screw
2
2
1
3 x 25mm Cap Screw
Nut
3mm
2
Must be purchased separately!
Cut off shaded portion
Pay close attention here
Apply threadlocker
(screw cement).
3x12mm
3mm
Cable rod
Aluminum ball
INSTALLING THE RUDDER LINKAGES
The rudder is controlled by two metal cables.
Install the rudder linkages and cables as below.
1. Use a hobby knife to remove the covering from
the openings for the rudder control cables.
2. The rudder has a block wood plate for mounting
the control horn. Two control horn in positioned
on both side rudder (left and right).
3. Install the control horn to the rudder.
4. Slide a crimp onto the cable, then pass the
cable through the threaded cable end. Pass
the cable back into the crimp and use crimping
pliers to secure the crimp to the cable. Guide
the cable into the fuselage to the position for
the rudder servo.
5. Thread the metal connector to the link ball.
6. Center the rudder servo using the radio and
install the servo arm. Attach the metal clevis to
the rudder servo arm.
7. Slide a crimp onto the cable, then pass the
cable through the threaded cable end. Pass
the cable back into the crimp and use crimping
pliers to secure the crimp to the cable.
8. Thread the metal connector to the metal clevis.
9. Attach the clevis to the rudder servo. There
should be light tension on each of the wires
when installed properly.
Note: Remember use thread locking compound
to secure.
3x12mm
Cable
3x25mm
YAK54 MK2
Instruction Manual
9
Rudder servo
3 x 12mm Screw
3 x 20mm Cap Screw
2
Nut
3mm
6
3mm
Cable rod
Cable rod
INSTALLING THE ELEVATOR SERVO
1. Remove the covering from both size of the
fuselage.
2. Install two servo to the fuselage as shown.
3. Repeat these step as installing the aileron
control horn.
INSTALLING THE ELEVATOR LINKAGES
. Repeat these step as installing the aileron
linkages.
120mm Push rod
2
3x20mm
Must be purchased separately!
Cut off shaded portion
Pay close attention here
YAK54 MK2
Instruction Manual
10
Apply threadlocker
(screw cement).
Elevator rod
3x12mm
Aluminum ball
Cut off shaded portion
YAK54 MK2
Instruction Manual
11
INSTALLING THE Tail wheel
3 x 12mm TP Screw
3 x 15mm Cap Screw
2
2
2
2
3mm Spring Washer
Spring
Must be purchased
separately!
3x12mm
Top Hatch
Silicone
Silicone
Open and close
INSTALLING THE ENGINE MOUNT
Apply threadlocker
(screw cement).
4 x 30mm Screw
4mm Washer
4mm Spring Washer
4x30mm
4x30mm
4mm
4mm
4mm
4mm
Engine Mount
YAK54 MK2
Instruction Manual
12
3x15mm
Spring
!
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.
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.
INSTALLING THE Fuel Tank
YAK54 MK2
Instruction Manual
13
!
7. Using a modeling knife, cut 3 lengths of fuel line
150mm long. 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.
INSTALLING THE THROTTLE PUSHROD SERVO
1. Place the engine into the engine mount and align it
properly with the front of the cowling.
If your engine is equipped with a remote needle
valve, we suggest installing it into the engine at
this time.
2. Slide the pushrod housing through the hole in the
firewall, through the hole in the forward bulkhead,
and into the servo compartment.
!
3. Apply epoxy glue to the pushrod housing where it
exits the firewall and where it passes through the
forward bulkhead. This will secure the housing in
place.
4. Using a modeling knife, cut off the nylon pushrod
housing 26mm in front of the servo tray.
Silicone Tube
Zip tie
Fuel Tank
YAK54 MK2
Instruction Manual
14
INSTALLING THE ENGINE
Locate the long piece of wire used for the throttle
pushrod. One end of the wire has been pre-bend
in to a "Z" bend at the factory. This "Z" bend
should be inserted into the throttle arm of the
engine when the engine is fitted onto the engine
mount. Fit the engine to the engine mount using
the screws provided.
Must be purchased
separately!
Nut
4x30mm Screw
4mm
4
8
4
4mm Washer
Temporarily install the engine and
make a hole for the throttle rod by
aligning with the position of the
throttle lever.
Throttle rod
PP Pipe
4x30mm
4x30mm
4mm
4mm
4mm
145mm
Throttle Rod
Engine Mount
Apply threadlocker (screw cement).
Cut off shaded portion
Ensure smooth, non-binding movement
when assembling
Must be purchased separately!
3. Slide the adjustable metal connector / servo arm
assembly over the plain end of the pushrod wire.
Position the throttle stick and the throttle trim at
their lowest positions.
4. Manually push the carburator barrel fully closed.
Angle the arm back about 45 degree from center
and attach the servo arm onto the servo. With the
carburator barrel fully closed, tighte the set screw
in the adjustable metal connector.
5. Remove the excess throttle pushrod wire using
wire cutters and install the servo arm retaining
screw.
!
INSTALLING THE THROTTLE
1. Install one adjustable metal connector through
the third hole out from the center of one servo
arm, enlarge the hole in the servo arm using a
2mm drill bit to accommodate the servo
connector. Remove the excess material from
the arm.
After installing the adjustable metal connector
apply a small drop of thin C/A to the bottom nut.
This will prevent the connector from loosening
during flight.
2. 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.
OS 120 AX
YAK54 MK2
Instruction Manual
15
DLE 20
Connector
1
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.
YAK54 MK2
Instruction Manual
16
Throttle Servo
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.
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 four screws.
7. Install the muffler. Connect the fuel and pressure
lines to the carburator, muffler and fuel filler
valve. Tighten the screws completely.
!
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 four holes in
the cowling.
Apply epoxy glue
5mm
Washer
Cowling
Silicone Glue
3 x 10mm TP Screw
Trim the cowling so it will match
your engine
Must be purchased
separately!
YAK54 MK2
Instruction Manual
17
INSTALLING THE SPINNER
Install the spinner back-plate, propeller and
spinner cone. The spinner cone is held in place
using two screws.
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.
!
3x12mm
Spinner
Spinner
Propeller
3x10mm
3x12mm TP Screw
2
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.
INSTALLING THE ELECTRIC MOTOR ( EP VERSION )
YAK54 MK2
Instruction Manual
18
4mm Washer
8
8
4mm Spring Washer
4 x 70mm Cap Screw
4 x 35mm Cap Screw
4x35mm
4x35mm
White glue
Must be purchased
separately!
Switch
On
Off
Foam Pad
Receiver
Tape
Foam Pad
Tape
Battery
Must be purchased
separately!
YAK54 MK2
Instruction Manual
19
White glue
< Check the
motor rotation >
When rotating clock wise, charge the
connection of 2 wires.
Velcro
Battery Cord
4x70mm
4x70mm
4mm
4mm
4mm
4mm
Electric Speed Controller
Open and Close
Top Hatch
Battery
Electric Speed Controller
Electric Speed Controller
3. Turn the airplane upside down. Place your fingers
on the masking tape and carefully lift the plane.
4. 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 137mm
(5.3 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 137mm (5.3 in) back from the
leading edge, at the fuselage sides.
YAK54 MK2
Instruction Manual
20
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 11mm up 11mm down
Elevator 11mm up 11mm down
Rudder 35mm right 35mm left
Low rate:
137mm
(5.3 in)
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.
Y-Harness
Switch
Receiver
Engine
Throttle Servo
Y-Harness
Battery (Receiver)
Rudder
Elevator Servo
Elevator
Elevator Servo
Elevator
Aileron Servo
Aileron Servo
Aileron
Aileron
Rudder Servo
YAK54 MK2
Instruction Manual
21
Elevator Control
Aileron Control
11mm
11mm
Rudder Control
35mm
35mm
11mm
11mm
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.
22
Main Gear Dimensional Detail
TAIL Gear Dimensional Detail
13.0
30.0
270.1
19.0
49.1
25.0
9.0
3.2
16.0
137.7
49.2
25.0
17.0
24.0
167.7
205.7
40.0
13.0
17.0
24.0
4.0
12.0
YAK54 MK2
Instruction Manual
23
EXPLODED VIEW
3mm
3mm
3mm
3x10mm(TP)
2mm
2mm
2x10mm
4x4mm
3x25mm
4x30mm
4x30mm
4x30mm
4mm
4mm
4mm
4mm
4x70mm
4mm
4mm
3x15mm
3x12mm
3mm
4x20mm
3x12mm
3x25mm
3x25mm
3x20mm
3x20mm
3mm
3mm
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