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.