Black Horse Model YAK 54 Owner's manual

INSTRUCTIONMANUALBOOK


RecommendedR.C:4channelwith
4-5 servos.


Propeller : 13 x 6.


Speed Control: 60A.


ElectricMotor: AXI 2826.10.


Battery:4-5Cells-Li-Poly-14.8-18.5v- 5.000mAh-20c.
SPECIFICATION
MadeinVietnam.


Wingspan : 144cm. 56.69in.


Length : 125cm. 49.21in.


Weight : 2.4kg. 5.28lbs.
PartsListingrequired(not included).


Glow Engine : 40-46 cu.in. 2 stroke.
or 52 cu.in. 4 stroke.

YAK 54. Instruction Manual
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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.
IfyouareinexperiencedwithbasicR/CflightwestronglyrecommendyoucontactyourR/Csupplier
and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training
proceduresdesignedtohelpthenew pilotonhiswaytosuccessfulR/C flight.Theywillalsobeable
to advise on any insurance and safety regulations that may apply.
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.
Some more parts.
HARDWAREPACK
COWLING.
Landinggear.....
To avoidscratching your newairplane,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
aircraftand toprotect thetable. Keepa couple
of jars or bowls handy to hold the small parts
after you open the bag.
Pleasetrialfitalltheparts. Makesureyouhave
the correct parts and that they fit and are
alignedproperly beforegluing!Thiswillassure
proper assembly. YAK 54 ARF is hand made
from natural materials, every plane is unique
andminor adjustmentsmayhave tobe 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.
PARTS LISTING.
FUSELAGE ASSEMBLY
(1) Fuselage.
WING ASSEMBLY
(1) Right wing half with pre-installed
aileron.
(1) Left wing half with pre-installed
aileron.
Tail section assembly
(1) Vertical stabilizer with pre-
installedrudder.
(1) Horizontal stabilizer with pre-
installedelevator halves.
SUGGESTION.
NOTE.

YAK 54. INSTRUCTION MANUAL
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+ 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.
+Theglowplug clipmustbesecurely attached
to the glow plug.
+ Do not flip the propeller with your fingers.
+ Keep loose clothing and wires away from
thepropeller.
+ 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
spinningpropeller.
 1. Install the rubber grommets and brass
eyelets onto the aileron servo.
INSTALLING THE AILERON SERVOS.
Caution: this model is not a toy!
If you are a beginner to this type of powered
model,please askan experiencedmodelflyer
forhelp andsupport.Ifyouattempttooperate
themodel withoutknowingwhat youaredoing
you could easily injure yourself or somebody
else. Please keep your safety and well-being
in mind at all times.
Important: before you start construction
Evenifyou havealready built alarge number
ofRC modelspleaseread rightthrough these
instructions and check all the kit components
against the parts list. We have taken great
trouble to keep construction as simple as
possible, without making any compromises
in the area of safety.
Note regarding the film covering
Minor creases or bubbles may develop in the
film covering due to major fluctuations in
weather conditions (temperature, humidity
etc.); in rare cases you may even find a slight
warp in a component. These minor faults are
in the nature of film-covered built-up wooden
structures, and can easily be corrected using
a heat gun, as commonly used for modelling.
Creases: Blowwarm airoverthearea
and rub down with a soft
cloth.
Wing warp: Hold the panel twisted
gently in the opposite
direction to the warp, and
apply warm air to remove
the creases from the
covering.
Caution! do not heat the film more than is
absolutely necessary. If the air or the iron is
too hot, the film may melt and holes may be
formed.
This model is highly pre-fabricated and can
bebuilt inavery shorttime.However,the work
which you have to carry out is important and
must be done carefully. The model will only
be strong and fly well if you complete your
tasks competently - so please work slowly
and accurately.
When self-tapping screws have to be
screwed into wood, apply a little white
glue to prevent them shaking loose: just
squirt white glue into the hole and fit the
screw.
SAFETY PRECAUTION.

YAK 54. Instruction Manual
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Repeat the procedure for the other wing
half.
5. 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.
4.Drill1,5mm pilotholes through theblock
of wood for each of the four mounting screws
providedwiththeservo.Installservointoaileron
servo tray as same as picture below.
 2. Using a modeling knife, remove the
covering at possition show below.
3. 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.
Remove the
covering.
Bottom of wing.
Electric wire.
Thread.
Secure

YAK 54. INSTRUCTION MANUAL
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 2. Drillthrough 6mm(diameter) theaileron
using the control horn as a guide and screw
the control horn in place.
1. Using a ruler & pen to draw a straight
line as below picture.
3. Install aileron control horn as same as
picture below.
C/Aglue.
C/Aglue.
INSTALLING THEAILERON CONTROLHORN.
ControlhornofAileron
Nilon control clasp.
M3locknut.
3x40mm.

YAK 54. Instruction Manual
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1. Working with the aileron linkage for
now, thread one clevis onto one of the
threaded wires.
2. Attach the clevis to the outer hole in the
control horn.
3. Plug the aileron servo into the receiver
andcentertheservo.Installthe servoarmonto
the servo. The servo arm should be
perpendicular to the servo and point toward
the middle of the wing.
AileronControlhorn
C/Aglue
Control horn.
C/Aglue.
C/Aglue.
INSTALLING THE AILERON
LINKAGES.

YAK 54. INSTRUCTION MANUAL
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4. 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
outfromthecenterofthe armtoaccommodate
the aileron pushrod wire.
5.Usingpliers,carefullymake a90 degree
bend down at the mark made. Cut off the
excess wire, leaving about 4mm beyond the
bend.
Bend.
Cut.
Snapkeeper. M2 locknut.
M2clevis.
6.Insertthe 90degree bend down through
the hole in the servo arm. Install one nylon
snap keeper over the wire to secure it to the
arm. Installthe servoarm retainingscrew and
remove the masking tape from the aileron.
Repeat the procedure for the other wing
half.
finishing.
Top side.

YAK 54. Instruction Manual
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INSTALLING THE ENGINE MOUNT.
THERE ARE TWO OPTIONS:
1. ELECTRIC MOTOR
2. ENGINE MOUNT.
1. OPTION 1: ENGINE MOUNT.
Cut
C/Aglue.
Engine mount.
4x25mm.
3x20mm.

YAK 54. INSTRUCTION MANUAL
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INSTALLING THE STOPPER ASSEMBLY
1.Thestopper hasbeen pre-assembledat
the factory.
2.Using amodeling knife,cut onelength of
siliconfuelline (thelength ofsilicon fuellineis
calculated by how the weighted clunk should
restabout 8mmaway fromtherearofthetank
andmove freelyinside thetank). Connectone
end of the line to the weighted clunk and the
other end to the nylon pick up tube in the
stopper.
3.Carefully bendthesecondnylontube up
ata 45degreeangle (usingacigarettelighter).
This tube will be the vent tube to the muffler.
4.Carefully bendthethirdnylontube down
ata 45degreeangle (usingacigarettelighter).
This tubewill bevent tubeto thefuelingvalve.
FUEL TANK. 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
amodeling knife. Ifflashing 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.
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 frontofthetankshould justabout
touch the back of the firewall.
Vent tube Fuel pick- up tube
Fuelfilltube

YAK 54. Instruction Manual
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Do not secure the tank into place perma-
nently until after balancing the airplane.
You may need to remove the tank to mount
the battery in the fuel tank compartment.
Blow through one of the lines to ensure
the fuel lines have not become kinked inside
the fuel tank compartment. Air should flow
througheasily.
9. To secure the fuel tank in place, apply a
bead of silicon sealer to the forward area of
thetank, whereit exitsthefuselagebehindthe
enginemountingbox andtotherearofthetank
at the forward bulkhead.
Fueltank.
Epoxyglue.
Fuel tank tray

YAK 54. INSTRUCTION MANUAL
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C/Aglue.
Locate the long piece of wire used for the
throttlepushrod. Oneend ofthewire hasbeen
pre-bend in to a “Z” bend at the factory. This
“Z” bend should be inserted into the throttle
armofthe enginewhentheengine isfittedonto
theengine mount.Fittheengineto theengine
mount using the screws provided.
INSTALLING THE ENGINE.
11cm.
Markpoint
Drill2mm hole
Pushrod wire
Secure
Pushrod wire.

YAK 54. Instruction Manual
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INSTALLING ENGINE MOUNT.
C/Aglue.
2. OPTION 2: ELECTRIC MOTOR
INSTALLING ELECTRIC MOTOR.
3 X 10mm.
4x25mm.
C/Aglue.
Epoxyglue.
Secure.
Push.

YAK 54. INSTRUCTION MANUAL
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Secure.
Rotor sharft.
Motor.
3.8cm
3.8cm
cut.
Tie wrap.
Battery.

YAK 54. Instruction Manual
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1. Slide the fiberglass cowl over the en-
gine and line up the back edge of the cowl
with the marks you made on the fuselage.
COWLING.
Left side
Bottom side
Right side
Trim and cut.
Bottom side
Trim and cut.
Right side

YAK 54. INSTRUCTION MANUAL
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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. Hold the cowl firmly in place using
pieces of masking tape.
4. Installthemufflerandmufflerextension
onto the engine and make the cutout in the
cowl for muffler clearance. Connect the fuel
and pressure lines to the carburetor, muffler
andfuel fillervalve.
3. Slide the cowl back over the engine
andsecure itin placeusing fourwood screws.
See picture below.
Installthe spinnerbackplate,propellerand
spinner cone. The spinner cone is held in
place using two 3mm x 12mm wood screws.
INSTALLING THE SPINNER.
1. Assemble and mounting the wheel
pants as shown in the following pictures.
MAIN GEAR INSTALATION.
PARTSREQUIRED
Machine screw.
Top side.
3X 10mm

YAK 54. Instruction Manual
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2. 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.
3. Using the hardware provided, mount
the main landing gear to the fuselage.
INSTALLING THE MAIN LANDING GEAR.
1. The blind nuts are already mounted in-
side the fuselage.
2. Theholes inthe landinggear shouldbe
to accept the mounting bolts.
Landing gear.
Secure

YAK 54. INSTRUCTION MANUAL
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 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 rud-
derhingelineandthetailwheelbracketshould
be centered on the plywood plate.
 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.
MOUNTING THE TAIL WHEEL
BRACKET.
3x12mm.
 3. Secure the tail wheel bracket in place
using three 3mm x 12mm wood screws. Be
careful not to overtighten the screws.
Secure
1. Install the rubber grommets and brass
colletsintotheelevatorservo.Test fittheservo
into the servo tray.
2. Mount the servo to the tray using the
mounting screws provided with your radio
system.
ELEVATOR INSTALLATION.
SERVO INSTALLATION.

YAK 54. Instruction Manual
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Center line.
Top elevator.
HORIZONTALSTABILIZER INSTALLATION.
 1. Using a modeling knife, carefully re-
move the covering at the mounting slot of
horizontal stabilizer(bothside offuselage).
Remove covering.
 2) Using a ruler and a pen, locate the
centerlineofthehorizontalstabilizer,at thetrail-
ingedge, andplaceamark.Use atraingleand
extend this mark, from back to front, across
the top of the stabilizer.Also extend this mark
downthe backofthe trailingedge ofthe stabi-
lizer .
 3. Slidethestabilizer intoplaceintheprecut
slot in the rear of the fuselage.The stabilizer
should be pushed firmly against the front of
the slot.
C/Aglue.
Bottom side.
Markline
Top side.
C/Aglue.
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.

YAK 54. INSTRUCTION MANUAL
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5. Remove the stabilizer. Using the lines
youjustdrew asa guide,carefully removethe
coveringfrom betweenthem usingamodeling
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
balsastructure mayweaken it.Thiscouldlead
to possible failure during flight
C/Aglue.
Epoxyglue.
Remove covering.
Topelevator.
8. After the epoxy has fully cured, re-
move the masking tape or T-pins used to
hold the stabilizer in place and carefully in-
specttheglue joints. Use more epoxy to fill
in any gaps that may exits that were not
filled previously and clean up the excess us-
ing a paper towel and rubbing alcohol.
Slide thestabilizerin placeand re-align.Dou-
blecheckall ofyour measurementsonemore
time before the epoxy cures. Hold the stabi-
lizer in place with T-pins or masking tape and
removeany excessepoxy usingapapertowel
and rubbing alcohol.
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 bottomofthestabilizermountingarea
and to the stabilizer mounting platform sides
in the fuselage. .
Bottomelevator.
Covered wood filler
piece

YAK 54. Instruction Manual
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Elevator control horn install as same as the
wayofaileroncontrolhorn.Pleaseseepictures
below.
Controlhornofelevator.
ELEVATOR CONTROL HORN INSTALLA-
TION.
3mm x 40mm.
M3 lock nut.
Nilon
control clasp.
Elevator control horn.
Drill 1 hole with 6 mm diameter.
Elevator
control horn. Elevator
control horn.
Markpoint
Bottom side.