Black Horse Model YAK 54 User manual

SPECIFICATION
MadeinVietnam.


Wingspan : 170 cm 66.93 in.


Length : 156 cm 61.42 in.


Weight : 3.9 Kg 8.58 Lbs.


Engine : 120 Two stroke.
120 Four stroke.


Radio : 6channels.


Servo : 6 servos.
ITEM CODE: BH48.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
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 yournew 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 air-
craftand toprotectthetable.Keepacoupleof
jars or bowls handy to hold the small parts af-
ter you open the bag.
Pleasetrialfitall theparts. Makesureyouhave
the correct parts and that they fit and are
alignedproperly beforegluing!Thiswill assure
proper assembly. YAK 54 ARF is hand made
from natural materials, every plane is unique
andminoradjustmentsmayhave 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 follow-
ing:paintthinner,C/Aglueaccelerator,C/Aglue
debonderandacetone.Donotletthesechemi-
cals 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.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
+ 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 clipmust besecurelyattached
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.
Donotstandinlinewiththesideof thepropel-
ler.
+ Make engine adjustments from behind the
propeller only. Do not reach around the spin-
ningpropeller.
SAFETY PRECAUTION.
 1. Install the rubber grommets and brass
eyelets onto the aileron servo.
INSTALLING THEAILERON SERVOS.
Caution: this model is not a toy!
If you are a beginner to this type of powered
model,please askan experiencedmodelflyer
forhelpandsupport.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 havealreadybuilt alarge number
ofRCmodelspleaseread 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, thework
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.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
C/Aglue.
C/Aglue.
2.Usingamodeling knife,remove thecov-
ering at possition show below.
Remove the
covering.
Bottom of wing.
4.Drill 1,5mmpilotholesthrough theblock
ofwoodforeachof thefour mountingscrews
provided with the servo. Install servo into ai-
leron servo tray as same as picture 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.
Repeat the procedure for the other wing
half.
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,
removethemasking tapeand theservo lead
from the thread.
Thread.
Electric
wire.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
INSTALLINGTHEAILERON CONTROLHORN.
. Install aileron control horn as same as
picture below.
ControlhornofAileron
Remove the
covering.
Aileron Control horn
3x40mm.
Nilon control clasp.
M3locknut.
Installaileroncontrolhornassame
aspicturebelow.
Control horn.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Bottom side.
Secure
C/Aglue.
Repeat the procedure for the other
wing half.
Installing the aileron linkages as pictures
below.
INSTALLING THE AILERON
LINKAGES.
M3 M3 lock nut
Repeat the procedure for the other wing
half.
INSTALLING THE ENGINE MOUNT.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Cut
C/Aglue.
INSTALLING THE STOPPER ASSEMBLY
FUEL TANK.
4x30mm
Engine mount

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YAK 54 - ITEM CODE: BH48.Instruction Manual
1. The stopper has been pre-assembled at
the factory.
2.Usingamodelingknife, cutone lengthof
silicon fuel line (the length of silicon fuel line is
calculated by how the weighted clunk should
restabout8mm awayfrom therear of thetank
andmovefreelyinsidethe tank).Connect one
end of the line to the weighted clunk and the
otherendto thenylon pickuptube inthe stop-
per.
3.Carefullybend the secondnylon tube up
ata 45degree angle(usingacigarettelighter).
This tube will be the vent tube to the muffler.
4. Carefully bend the third nylon tube down
ata 45degree angle(usingacigarettelighter).
This tubewill beventtubetothefuelingvalve.
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 stop-
per expands and seals the tank opening. Do
not over tighten the assembly as this could
cause the tank to split.
7.Usingamodelingknife,cut3 lengthsof
fuel line 150mm long. Connect 2 lines to the
2vent tubesand 1line tothe fuelpickup tube
in the stopper.
8. Feed three lines through the fuel tank
compartmentand throughthepre-drilledhole
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,thefrontofthetankshouldjustabout
touch the back of the firewall.
silicon tube not included.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Do not secure the tank into place per-
manently 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.Tosecure thefueltankin place,applya
bead of silicon sealer to the forward area of
the tank, where it exits the fuselage behind
the engine mounting box and to the rear of
the tank at the forward bulkhead.
Fuel tank tray.
Fueltank.
Locate the long piece of wire used for the
throttlepushrod.One endofthewire hasbeen
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.
C/Aglue.
INSTALLING THE ENGINE-
THROTTLE.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
13.5cm.
Markpoint.
Secure
Drill 2mm hole
COWLING.
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.
Pushrod wire.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Bottom side.
Trimandcut.
Right side.
Trimandcut.
Bottom side.
Right side.
2. While keeping the back edge of the
cowl flush with the marks, 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 nearly the middle of the
cowl opening. Hold the cowl firmly in place
using pieces of masking tape.
Left side.
4. Install the muffler and muffler exten-
sion onto the engine and make the cutout in
the cowl for muffler clearance. Connect the
fueland pressurelinestothe carburetor,muf-
fler and fuel filler valve.
3. Slide the cowl back over the engine
andsecureitin placeusingfour woodscrews.
See picture below.
Top side.
3x12 mm.
Machine screw.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Install the spinner backplate, propeller
and spinner cone. The spinner cone is held
in place using two 3mm x 15mm wood
screws.
INSTALLING THE SPINNER.
3 x 12mm.
MAIN GEAR INSTALATION.
PARTSREQUIRED
1. Assemble and mounting the wheel
pants as shown in the following pictures.
Drill 8mm hole
Drill 5mm hole

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YAK 54 - ITEM CODE: BH48.Instruction Manual
2. Adrop of C/Aglue on the wheel collar
screwswill helpkeep themfrom cominglose
duringoperation.
Repeat the process for the other wheel.
INSTALLINGTHE MAIN LANDING GEAR.
1. The blind nuts are already mounted
inside the fuselage.
2. The holes in the landing gear should
be to accept the mounting bolts.
3. Using the hardware provided, mount
the main landing gear to the fuselage.
Repeat the procedure for the other
wheel pant .
Landing gear.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Secure.


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-
der hinge line and the tail wheel bracket
should be centered on the plywood plate.


2. Using a pen, mark the locations of the
twomounting screws. Removethe tailwheel
bracket and drill 1mm pilot holes at the loca-
tions marked.
3x12mm
MOUNTING THE TAIL WHEEL
BRACKET.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
INSTALLING THE FUSELAGE
SERVOS.
1. Install the rubber grommets and brass
collets into the elevator servo. Test fit the
servo into the servo tray.
2. Mount the servo to the tray using the
mounting screws provided with your radio
system.
Remove the covering
Throttle servo.
Rudder servo
elevatorservoright side
elevator servo left side
Horizontal stabilize installation .
See picture below.
HORIZONTALSTABILIZER INSTALLATION.
Center line.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
1. Using amodeling knife, cut away the
covering from the fuselage for the stabilizer
and remove it.
C/Aglue.
C/Aglue.
2. Draw a center line onto the horizontal
stabilizer.Thenputthehorizontalintothefuse
large.
3. Mark the shape of the vertical on the
left and right sides onto the horizontal stabi-
lizer using a felt-tip pen
Center line.
Top elevator.
Center line.
Bottom elevator.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
4. Remove the stabilizer. Using the lines
you just drew as a guide, carefully remove
the covering from between them using a
modelingknife.
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 fail-
ure during flight
Bottom side.
Remove covering.
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
topandbottomof thestabilizermountingarea
and to the stabilizer mounting platform sides
in the fuselage. Slide the stabilizer in place
and re-align. Double check all of your meas-
urements one more time before the epoxy
cures. Remove any excess epoxy using a
papertowel andrubbing alcoholand holdthe
stabilizerinplace withT-pins ormaskingtape.
Check to mark sure the wing and stabi-
lizer are paralell. If they are not, lightly sand
theopeninginthefuselageforthe stabilizer
until the stabilizer is paralell to the wing.
Epoxyglue.
C/Aglue.
6. After the epoxy has fully cured, re-
move
themaskingtapeorT-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
cleanupthe excessusing apaper toweland
rubbingalcohol.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
ELEVATOR CONTROL HORN
PUSHROD INSTALLATION.
Elevator control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
Controlhornofelevator.
3mm x 30mm.
M3locknut.
Nilon control clasp.
C/Aglue.
Remover
covering Remover covering
ELEVATOR PUSHDROD
INSTALLATION
Elevator pushrod install as same as the
way of aileron pushrod.
Elevator
pushrod. Elevator
pushrod.
Elevator
control horn Elevator
control horn
Bottomsideofelevator.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
VERTICAL INSTALLATION.
C/Aglue.
Vertical stabilizer installation
See picture below.
Hinge.
1. Using a modeling knife cut away the
coveringfrom theendof fuselage fortherud-
derhinge.
3. Mark the shape of the vertical on the
left and right side on the rudder using a felt-
tippen.
2. Put the rudder into the fuselage as
same as picture below.
C/Aglue.
C/Aglue.
Hingeslot.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
4. Now, remove the rudder and using a
modeling knife, carefully cut just inside the
marked lines and remove the film of the rud-
der. Just as you did with the horizontal stabi-
lizer, make sure you only press hard enough
to cut the film, not the balsa rudder.
Pen.
Remove
covering.
Also carefully remove the covering from
below the lines as you drew as same picture
below.
Epoxyglue.
5. Put the vertical stabilizer back in
place. Using a triangle, check to ensure
that the vertical stabilizer is aligned 90 de-
gree to the horizontal stabilizer.
Epoxyglue.
6) When you are sure that everything is
a aligned correctly, mix up a generous
amountof30minuteepoxy.Applyathinlayer
to the slot in the mounting platform and to
the vertical stabilizer mounting area. Apply
epoxyto thelower rudderhinge.Setthesta-
bilizer in place and re-align. Double check
all of your measurements once more be-
fore the epoxy cures. Remove any excess
epoxy using a paper towel and rubbing al-
cohol and hold the stabilizer in place with T-
pinsor maskingtape.Allowthe epoxytofully
cure before proceeding.
C/Aglue.