Seagull Models YAK 54 User manual

MS: 65
ASSEMBLY MANUAL
Kit features.
• Ready-made—minimalassembly&finishingrequired.
• Ready-coveredcovering.
• Photo-illustratedstep-by-stepAssemblyManual.
MadeinVietnam.
Specifications
Wingspan---------------------------------------- 57in----------------------------145cm.
Wing area---------------------------------------- 697 sq.in------------------- 45 sq.dm.
Approximate flying weight------------------ 6.4-7.5lbs------------------- 2.9-3.4kg.
Length--------------------------------------------52.8in---------------------------134cm.
Recommended engine size---------------- .61 cu.in---------------------- 2-stroke.
.72-.82 cu.in------------------ 4-stroke.
Radio System required 4 channels with 6 digital servos.
Flying skill level Intermediate/advanced.

YAK 54. Instruction Manual
2
INTRODUCTION.
Thank you for choosing the YAK 54 ARTF by SEAGULL MODELS. The YAK 54 was designed
withtheintermediate/advancedsportflyerinmind.Itisa scale airplane whichiseasytoflyandquick
to assemble. The airframe is conventionally built using balsa, plywood to make it stronger than the
averageARTF,yetthedesignallowstheaeroplanetobekeptlight.Youwillfindthatmostofthework
has been done for you already. The motor mount has been fitted and the hinges are pre-installed
. Flying the YAK 54 is simply a joy.
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manual thoroughly before starting assembly of your YAK 54. Use the parts listing below to identify
all parts.
WARNING.
Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it
is capable of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE YOU
ASSUME ALL RISK & RESPONSIBILITY.
If you are inexperienced with basic R/C flight we strongly recommend you contact your R/C
supplierandjoinyourlocalR/CModelFlyingClub.R/CModelFlyingClubsofferavarietyoftraining
proceduresdesignedtohelpthenewpiloton his way to successful R/C flight. They will also beable
to advise on any insurance and safety regulations that may apply.
ADDITIONAL ITEMS REQUIRED.
.61 2-stroke engine
.72-.82 4-stroke engine
Computer radio with six digital
servos.
Glow plug to suit engine.
Propeller to suit engine.
Protective foam rubber for radio
system.
Siliconefuel line.
TOOLS & SUPPLIES NEEDED.
Thick cyanoacrylate glue.
30 minute epoxy.
5 minute epoxy.
Hand or electric drill.
Assorted drill bits.
Modellingknife.
Straight edge ruler.
2mm ball driver.
Phillips head screwdriver.
220 grit sandpaper.
90° square or builder’s triangle.
Wire cutters.
Masking tape & T-pins.
Thread-lock.
Paper towels.
PARTS LISTING.
FUSELAGE ASSEMBLY
(1) Fuselage.
(1) Canopy hatch.
WING ASSEMBLY
(1) Right wing half/ aileron.
(1) Left wing half with/ aileron.
(1) Aluminium dihedral brace.
Tail section assembly
(1) Horizontal stabilizer/ elevator
halves.
(1) Rudder halves.
Some more parts.
HARDWAREPACK
COWLING
Landinggear.....

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3
NOTE: To avoid scratching your new aero-
planewesuggestthatyoucoveryour
workbench with an old towel. Keep a
couple of jars or bowls handy to hold
the small parts after you open the
bags.
Pleasetrialfitallparts.Makesureyou
have the correct parts and that they
fit and are aligned properly before
gluing! This will ensure proper as-
sembly as the YAK 54 is made from
natural materials and minor adjust-
ments may have to be made.
The paint and plastic parts used in
this kit are fuel proof. However, they
arenottolerantofmanyharshchemi-
cals including the following: paint
thinner, cyano-acrylate glue accel-
erator,cyanoacrylategluede-bonder
andacetone.Donot let thesechemi-
calscome incontact withthe colours
onthecoveringand the plasticparts.
Please contact Horizon Hobby for product support and technical assistance at 877-
504-0233. ReplacementpartsareavailablefromyourlocaldealerorthroughHorizon
Hobby.
HORIZON HOBBY DISTRIBUTIONS INC
4105FieldstoneRd, Champaign, IL 61822- USA
FOR USA MARKET ONLY.
Horizon Hobby, Inc. guarantees this kit to be free from defects in both material and workmanship
at the date of purchase. This warranty does not cover any parts damage by use or modification.
In no case shall Horizon Hobby’s liability exceed the original cost of the purchased kit. Further,
Horizon Hobby reserves the right to change or modify this warranty without notice. In that
Horizon Hobby has no control over the final assembly or material used for the final assembly,
no liability shall be assumed nor accepted for any damage resulting from the use by the user
of the final user-assembled product. By the act of using the user-assembled product, the user
accepts all resulting liability.
Once assembly of the model has been started, you must contact Horizon Hobby, Inc. directly
regarding any warranty question that you have. Please do not contact your local hobby shop
regarding warranty issues, even if that is where you purchased it. This will enable Horizon to
better answer your questions and service you in the event that you may need any assistance.
If the buyer is not prepared to accept the liability associated with the use of this product, the
buyer is advised to return this kit immediately in new and unused condition to the place of
purchase.
Horizon Hobby
4105 Fieldstone Road
Champaign, Illinois 61822
[phone]

YAK 54. Instruction Manual
4
1)Carefullyremove the aileronfrom one of
thewingpanels.Notethepositionofthehinges.
2)Removeeachhinge from thewingpanel
and aileron and place a T-pin in the center of
each hinge. Slide each hinge into the wing
panel until the T-pin is snug against the wing
panel. This will help ensure an equal amount
ofhingeison either side ofthehingelinewhen
the aileron is mounted to the aileron.
HINGING THE AILERONS.
3) Slide the wing panel on the aileron until
there is only a slight gap. The hinge is now
centered on the wing panel and aileron.
Remove the T-pins and snug the aileron
against the wing panel.A gap of 1/64” or less
shouldbe maintained betweenthe wing panel
andaileron.
4)Deflect the aileron and completely
saturate each hinge with thin C/A glue. The
aileronsfrontsurfaceshould lightly contact the
wing during this procedure. Ideally, when the
5)Turnthe wingpanel over anddeflect the
aileron in the opposite direction from the
opposite side. Apply thin C/A glue to each
hinge,makingsure that the C/Apenetratesinto
both the aileron and wing panel.
The hinge is constructed of a special
material that allows the C/A to wick or
penetrateanddistributethroughout the
hinge, securely bonding it to the wood
structureof the wingpanel and aileron.
hinges are glued in place, a 1/64” gap or less
will be maintained throughout the lengh of the
aileron to the wing panel hinge line.
Note:
The control surfaces, including the
ailerons, elevators, and rudder, are
prehinged with hinges installed, but the
hinges are not glued in place. It is
imperativethat you properly adhere the
hingesin place per the steps that follow
using a high-quality thin C/A glue.
Note:
C/Aglue.
Hinge.
T-pin.
T-pin.
C/Aglue.
T-pin.

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3x20mm.
HINGING THE ELEVATOR.
8)Afterbothailerons are securely hinged,
firmly grasp the wing panel and aileron to
make sure the hinges are securely glued and
cannot be pulled out. Do this by carefully
applying medium pressure, trying to separate
the aileron from the wing panel. Use caution
not to crush the wing structure.
7) Repeat this process with the other wing
panel, securely hinging the aileron in place.
6) Using C/A remover/debonder and a
papertowel, remove anyexcessC/A glue that
may have accumulated on the wing or in the
aileronhinge area.
HINGING THE RUDDER.
Glue the elevator hinges in place using the
same tectniques used to hinge the ailerons.
Glue the rudder hinges in place using the
same tectniques used to hinge the ailerons.
Work the aileron up and down several
times to “work in” the hinges and check
for proper movement.
Note:
TURNBUCKLE INSTALLATION.
Theholelocationofturnbuckles shown in pic-
ture below .
The mounting holes of turnbuckle was
pre-drilled at factory.
Installing theturnbuckle for tail strut ofhori-
zontal fin as same as pictures below.
See pictures below:
Mark and drill 4 holes for engine mount.
3x25mm.
ENGINE MOUNT INSTALLATION.
Horizontal fin bottom.
Turnbuckle.
Hinge.
pre-drilled at factory

YAK 54. Instruction Manual
6
2) Usinga modeling knife,cut onelength
ofsiliconfuel line. Connect oneend of theline
tothe weighted fuel pick up andthe other end
to the nylon pick up tube.
3) Carefully bend the second nylon tube
up at a 45º angle. This tube is the vent tube.
Carefully use a lighter or heat gun to
permenently set the angle of the vent tube.
4) 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 falls into the tank.
5) With the stopper assembly in place,
the weighted pick-up should rest away from
therear of the tank and move freely inside the
tank. The top of the vent tube should rest just
below the top of the tank. It should not touch
the top of the tank.
6) When satisfied with the alignment of
the stopper assembly tighten the 3 x 20mm
machine screw until the rubber stopper ex-
pands and seals the tank opening. Do not
overtighten the assembly as this could cause
the tank to split.
Important: When the stopper assembly is in-
stalled 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.
1) Using a modeling knife, carefully cut
off the rear portion of one of the 3 nylon tubes
leaving 1/2” protruding from the rear of the
stopper. This will be the fuel pick up tube.
INSTALLING THE STOPPERASSEMBLY.
FUEL TANK INSTALLATION.
Attach the silicone fuel and pressure pipes
tothetank. The lowerpipeis the ‘feed’andthe
uppertwo the ‘pressureand fill’. Thefill pipe is
the next pipe.
Venttube. Fuel pick up tube.
Fuel fill tube.

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1) Assembleand mountingthewheelpants
as shown in the following pictures.
2) Follow diagram below for wheel
installation:
Blow through one of the lines to ensure
thefuel lines have not become kinked in-
side the fuel tank compartment. Air should
flowthrough easily.
You should mark which tube is the vent
and which is the fuel pickup when you
attach fuel tubing to the tubes in the stopper.
Once the tank is installed inside the fuselage,
it may be difficult to determine which is which.
WheelCollar.
Axle.
Wheel.
LandingGear.
Nut.
(2)Washer.
3) You have to trim each axle using a tool
cutting and cut-off wheel.
46mm
Caution when cutting the axles and
wear protective goggles.
Plastic tape.
WHEEL INSTALLATION.
Rubber band.
Fueltank.
2:Fuel pick-up
tube. 3:Fuelfill tube.
1:Vent tube.
1
23
1

YAK 54. Instruction Manual
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(2)Wheel Collar.
Axle.
Wheel. Nut.
Nut.
(2)Washer.
1) The blind nuts for securing the landing
gearare already mountedinsidethe fuselage.
2) Using the hardware provided, mount
the main landing gear to the fuselage.
4) A drop of C/A glue on the wheel collar
screws will help keep them from coming lose
duringoperation.
Repeat the process for the other wheel.
4) Remove the engine. Using an drill bit,
drill the mounting holes through the engine
mount at the four locations marked.
 2) Place your engine onto the engine
mount. Adjust the engine is centered of the
edges of the engine case.
 3) When you are satisfied with the align-
ment, mark the locations of the engine
mounting.
1) Install the pushrod housing through the
predrilledholein the firewall andintothe servo
compartment. The pushrod housing should
protrude 1/4" out past the front of the firewall.
Makea Z-Bend 1/4"fromone end oftheplain
wire pushrod.
MOUNTING THE ENGINE.
INSTALLING THE MAIN LANDING GEAR.
130mm.
4x20mm.
Landinggear.

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 5) Bolttheenginetotheenginemountusing
the four machine screws. Double check that
all the screws are tight before proceeding.
 6) AttachtheZ-Bendin the pushrodwire to
thethrottlearmonthe carburetor.Youwill need
toremovethethrottlearmfromthecar-buretor
to be able to attach the Z-bend. When
complete,re-attach the throttlearm to thecar-
buretor.
COWLING INSTALLATION.
1) Slide the fiberglass cowl over the en-
gineandline up thebackedgeof the cowlwith
themarks you made on thefuselage thentrim
and cut.
2) While keeping the back edge of the
cowl flush with the marks, align the front of
thecowlwiththecrankshaftoftheengine. The
front of the cowl should be positioned so the
crankshaft is in nearly the middle of the cowl
opening.Usethespinner backplate as a guide.
Hold the cowl firmly in place using pieces of
masking tape.
3) Installthemufflerandmufflerextension
onto the engine and make the cut out in the
cowl for muffler clearance. Connect the fuel
and pressure lines to the carburetor, muffler
and fuel filler valve. Secure the cowl to fuse-
lage using the 3x10mm screws (4).
Becauseof the sizeofthe cowl,itmay be nec-
essaryto use a needle valveextension forthe
highspeedneedle valve. Make thisoutof suf-
ficient length 1.5mm wire and install it into the
end of the needle valve. Secure the wire in
placeby tightening theset screwin the sideof
the needle valve.
Pushrodwire. 4x30mm.
4.2mm.
Trimand cut.

YAK 54. Instruction Manual
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Install the spinner backplate, propeller and
spinner cone.
INSTALLING THE SPINNER.
INSTALLING THE FUSELAGE SERVO.
INSTALLING THE SWITCH.
Installthe switch intotheprecut hole inthe
side, in the fuselage.
1) Installthe rubber grommets and brass
colletsonto the throttleservo. Testfittheservo
into the aileron servo mount.
 2) Secure the servos with the screws pro-
vided with your radio system.The position
show in picture below:
Because the size of servos differ, you
mayneedtoadjustthesizeofthe precut open-
ing in the mount. The notch in the sides of the
mount allow the servo lead to pass through.
The propeller should not touch any part
of the spinner cone. If it does, use a
sharp modeling knife and carefully trim away
the spinner cone where the propeller comes
in contact with it.
Removecovering.
3x10mm.
Elevator servo.
Rudder
servo.
Elevator servo. Throttle servo.

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THROTTLE SERVO ARM INSTALLATION.
1) Install adjustable servo connector in
the servo arm as same as picture below:
HORIZONTALSTABILIZER.
1) Using a ruler and a pen, locate the
centerlineof thehorizontalstabilizer,atthetrail-
ing edge, and place a mark. Use a triangle
and extend this mark, from back to front,
across the top of the stabilizer. Also extend
thismark down the back of the trailingedge of
the stabilizer.
2)Usinga modeling knife,carefullyremove
thecoveringat mounting slotof horizontal sta-
bilizer ( both side of fuselage).
 3) Slide the stabilizer into place in the pre-
cut slot in the rear of the fuselage. The stabi-
lizer should be pushed firmly against the front
of the slot.
 4) With the stabilizer held firmly in place,
use a pen and draw lines onto the stabilizer
where it and the fuselage sides meet. Do this
on both the right and left sides and top and
bottom of the stabilizer.
 5) Remove the stabilizer. Using the lines
youjust drew as a guide,carefully removethe
covering from between them using a model-
ingknife.
Center line.
AdjustableServo
connector.
Servoarm.
Nut.
Remove covering.
Pen.
Switch.
Throttle.
Removecovering.

YAK 54. Instruction Manual
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 6) Using a modeling knife, carefully re-
move the covering that overlaps the stabilizer
mounting platform sides in the fuselage. Re-
move the covering from both the top and the
bottom of the platform sides.
 7) When you are sure that everything is
aligned correctly, mix up a generous amount
of 30 Minute Epoxy. Apply a thin layer to the
topand bottom ofthe stabilizer mountingarea
and to the stabilizer mounting platform sides
in the fuselage. Slide the stabilizer in place
and realign. Double check all of your mea-
surementsoncemore before theepoxycures.
HoldthestabilizerinplacewithT-pinsormask-
ing tape and remove any excess epoxy using
a paper towel and rubbing alcohol.
Remove covering. 2) Slidethe vertical stabilizer into theslot
in the top of the fuselage. The rear edge of
thestabilizer shouldbe flushwiththerearedge
of the fuselage and the lower rudder hinge
should engage the precut hinge slot in the
lowerfuselage. The bottom edge of thestabi-
lizer should also be firmly pushed against the
top of the horizontal stabilizer.
1) Using a modeling knife, remove the
covering from over the precut hinge slot cut
intothelowerrearportionofthefuselage. This
slot accepts the lower rudder hinge.
When cutting through the covering to re-
move it, cut with only enough pressure
toonly cut through the covering itself. Cutting
into the balsa structure may weaken it.
COVERED WOOD FILLER PIECE
INSTALLATION.
VERTICAL STABILIZER INSTALLATION.
Covered wood
filler piece.
Glued epoxy.
Hinge.
Hingeslot.

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3) While holding the vertical stabilizer
firmly in place, use a pen and draw a line on
each side of the vertical stabilizer where it
meets the top of the fuselage.
4) Remove the stabilizer. Using a mod-
eling knife, remove the covering from below
the lines you drew.
Pen.
5) Slide the vertical stabilizer back in
place. Using a triangle, check to ensure that
thevertical stabilizer is aligned 90ºto the hori-
zontal stabilizer.
Set the stabilizer in place and realign. Double
checkallofyour measurements once morebe-
foretheepoxycures.Holdthestabilizerinplace
with T-pins or masking tape and remove any
excess epoxyusing a paper toweland rubbing
alcohol. Allow the epoxy to fully cure before
proceeding.
6) When you are sure that everything is
alignedcorrectly,mixupagenerousamountof
30MinuteEpoxy. Applyathinlayertothemount-
ingslotinthetopofthefuselageandtothesides
and bottom of the vertical stabilizer mounting
area. Applyepoxy tothebottomandtop edges
of the filler block and to the lower hinge also.
When cutting through the covering to re-
moveit, cutwith onlyenough pressureto
only cut through the covering itself. Cutting
into the balsa structure may weaken it.
90º
Vertical
Stabilizer.
Horizontal
Stabilizer.
INSTALLING THE AILERON SERVOS.
Servos.
Small weight.
String.
Remove
covering.
C/Aglue.
Rudder.

YAK 54. Instruction Manual
14
Secure the servos with the screws pro-
vided with your radio system.
Repeat the procedure for orther wing
haft.
Wing bottom.
String.
Small weight.
Attach the string to the servo lead and
carefully thread it though the wing. Once you
havestringthelead throught the wing,remove
the string so it can use for the other servo
lead.Tapetheservoleadtothewingtoprevent
it from falling back into the wing.
Because the size of servos differ, you
mayneedtoadjust the size oftheprecutopen-
ing in the mount. The notch in the sides of
themountallowtheservoleadtopassthrough.
Using a small weight (Weighted fuel pick-up
workswell)and string, feed the string through
the wing as indicated.
Electric wire.
String.
Plastic tape.
Aileronelectric.
Wing.
Pull.
Wing panel
bottom.
String.
Electric wire.
Wing bottom.
String.
Small weight.

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AILERONCONTROLHORNINSTALLATION
Aileron control horn:
Mix a small amount of 30 minute epoxy and
lightly coat the inside of the hole in the aileron
and the control horn screw.
Wing.
Aileron.
drillhole
3.2mm.
Wing bottom.
Wing bottom.
72mm.
C/Aglue.
Wing bottom.
Aileroncontrol horn.
Center the servo using the radio system.
Attach the servo arm to the servo using the
screw provided with the servo.
2 sets.
3x40mm. Wing bottom.
M3lock nut.
M3nut.
Aluminium washer.
M3 control horn.

YAK 54. Instruction Manual
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Repeat the procedure for the other wing.
ELEVATOR - RUDDER CONTROL HORN
INSTALLATION.
 3) Install the ruddercontrol horn using the
same method as with the elevator control
horns.
Wing.
Aileron.
 2) Elevatorandrudderpushrodsassembly
follow pictures below.
1) Thread one clevis and M2 lock nut on
toeachelevator control rod. Threadthehorns
onuntilthey are flushwith the endsofthe con-
trol rods.
ELEVATOR - RUDDER PUSHROD
INSTALLATION.
 1) Install the elevator control horn using
the same method as with the aileron control
horns.
 2) Position the elevator control horn on
the both side of elevator.
M2 lock nut.
2 sets.
3x35mm.
Right side.
Elevator control horn.
Rudder
control
Elevator
control horn.
Left side.

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M2 lock nut. Snapkeeper.
M2clevis.
INSTALLING TAIL STRUT SYSTEM.
The tail strut system assembly follow
pictures below.
3x10mm. Alumium
trap.
42mm.
Throttle.
Rudder.
Elevator.
Alumium trap.
3x10cm(2pcs). 1
Plastic clip.
2
1
Rudderpushrod.
Elevatorpushrod.
Turnbuckle.

YAK 54. Instruction Manual
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 3) Secure the tail wheel bracket in place
using two 3x10mm wood screws. Be careful
not to overtighten the screws.
 2) Using a pen, mark the locations of the
two mounting screws. Remove the tail wheel
bracket and drill 1mm pilot holes at the loca-
tions marked.
1) Plug the six servo leads and the switch
lead into the receiver. Plug the battery pack
lead into the switch also.
2) Wrap the receiver and battery pack in
the protective foam rubber to protect them
from vibration.
 3) Routethe antenna in theantenna tube
inside the fuselage and secure it to the bot-
tom of fuselage using a plastic tape.
INSTALLING THE BATTERY-RECEIVER.
See pictures below.
MOUNTING THE CONTROL CLASP. ATTACHMENT WING-FUSELAGE.
Attach the aluminium tube into fuselage.
 1)Set the tail wheel assembly in place on
the plywood plate. The pivot point of the tail
wheel wire should be even with the rudder
hinge line and the tail wheel bracket should
be on the plywood plate.
MOUNTING THE TAIL WHEEL.
2
Receiver.
Tiewrap.
Antenna.
Controlclasp.
2x20mm.
2 screws.

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Insert two wing panels as pictures below.
1) It is critical that your airplane be bal-
anced correctly. Improper balance will cause
yourplaneto lose controlandcrash. The cen-
ter of gravity is locate 6.5-7.5cm back from
theleadingedge of the wing,measuredatwing
tip.
BALANCING.
2) 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
sides under the horizontal stabilizer. If the tail
of the plane falls, the plane is tail heavy. To
correctthis,move the batteryand receiver for-
ward orif this is not possible, stick weight onto
the firewall. When balanced correctly, the air-
plane should sit level or slightly nose down
when you lift it up with your fingers.
2) Turn on the radio system, andwith the
trim tabs on the transmitter in neutral, center
the control surfaces by making adjustments
totheclevisesor adjustable servoconnectors.
The servo arms should be centered also.
1) We highly recommend setting up the
YAK 54 usingthecontrol throws listedat right.
We have listed control throws for both Low
Rate (initial test flying/sport flying) and High
Rate (aerobatic flying).
 3) When the elevator, rudder and aileron
control surfaces are centered, use a ruler and
check the amount of the control throw in each
surface. The control throws should be
measured at the widest point of each sur-
face!
CONTROL THROWS.
Wing bolt.
CG=6.5 - 7.5cm.

YAK 54. Instruction Manual
20
FLIGHT PREPARATION.
 A) Check the operation and direction of
the elevator, rudder, ailerons and throttle.
 B) Plug in your radio system per the
manufacturer's instructions and turn every-
thingon.
 4) By moving the position of the adjust-
able control horn out from the control surface,
you will decrease the amount of throw of that
control surface. Moving the adjustable con-
trol horn toward the control surface will in-
crease the amount of throw.
INITIAL FLYING/SPORT FLYING
Do not use the aerobatic settings for
initial test flying or sport flying.
Ailerons: 3/16” up 3/16” down
Elevator: 3/8” up 3/8” down
Rudder: 3/4” right 3/4” left
AEROBATIC FLYING
Ailerons: 3/8” up 3/8” down
Elevator: 7/8” up 7/8”down
Rudder: 1 1/4” right and left
 F) From behind the airplane, look at the
aileronontheright wing half. Movetheaileron
sticktotheright. Therightaileronshouldmove
upandthe other aileronshould move down. If
it does not, flip the servo reversing switch on
your transmitter to change the direction.
PREFLIGHT CHECK.
1) Completely charge your transmitter
and receiver batteries before your first day of
flying.
2) Check every bolt and every glue joint
intheYAK 54 to ensure thateverythingis tight
and well bonded.
3) Double check the balance of the air-
plane. Do this with the fuel tank empty.
4) Checkthe control surfaces. All should
move in the correct direction and not bind in
any way.
5) If your radio transmitter is equipped
withdual rate switchesdouble check thatthey
are on the low rate setting for your first few
flights.
6) Check to ensure the control surfaces
are moving the proper amount for both low
and high rate settings.
 E)Check the throttle. Moving the throttle
stick forward should open the carburetor bar-
rel. Ifitdoesnot,fliptheservoreversingswitch
on your transmitter to change the direction.
 D) Check the rudder. Looking from be-
hindthe airplane, move the rudder stick to the
right. Theruddershould move totheright. If it
does not, flip the servo reversing switch on
your transmitter to change the direction.
 C) Check the elevator first. Pull back on
theelevator stick. The elevator halves should
move up. If it they do not, flip the servo re-
versing switch on your transmitter to change
the direction.
8) Properlybalance thepropeller. Anout
of balance propeller will cause excessive vi-
bration which could lead to engine and/or air-
frame failure.
We wish you many safe and enjoyable
flights with your YAK 54.
7) Check the receiver antenna. It should
be fully extended and not coiled up inside the
fuselage.