Black Horse Model BH48 Owner's 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.
Instruction Manual book

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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.Theywillalso beable
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 toprotect thetable.Keepacoupleof
jars or bowls handy to hold the small parts af-
ter 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 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
Caution: this model is not a toy!
Ifyouare abeginner tothis typeofpowered model,please askan experiencedmodelflyer forhelp
and support. If you attempt to operate the model without knowing what you are doing 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
Even if you have already built a large number of RC models please read right through 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: Blow warm air over the area 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 be built in a very short time. However, the work which
youhaveto carryout isimportantandmust bedone carefully.The modelwill onlybe strong andfly
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.
+ 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.
SAFETY PRECAUTION.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
REPLACEMENT LARGE PARTS
C. Fuselage.
E.Rudder
D.Horizontal stabilizer
B.Wings panel(B1&B2).
F.Aluminium tube wing
A.Cowling
K.Pilot
REPLACEMENT SMALL PARTS
3.Spinner.
6. Fuel Tank.
5. Wheels.
2.Wheel pants
1.Aluminium landing gear.
7.Tailgear.
4. Plastic engine mount
5x45mm 5x45mm
20

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Temporary pin to
keep hinge centered.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
Cutthecovering
awayfromtheslot.
2.Usingamodeling knife,remove thecov-
ering at possition show below.
Bottom of wing.
Remove the
covering.
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.
4)Drill 1,6mmpilot holesthroughtheblock
of wood for each of the four mounting screws
provided with the servo.
Thread.
Electric
wire.
 1. Install the rubber grommets and brass
eyelets onto the aileron servo.
INSTALLING THEAILERON SERVOS.
Bottom of wing.
Aileron

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Aileron Control horn
INSTALLINGTHEAILERON CONTROLHORN.
Installaileron controlhorn assame as
picturebelow.
A+B Epoxy
PLUSglue
Drillahole
3mm
Installing the aileron linkages as pictures
below.
70mm 3x10 mm.
Secure.
5. Instal servo tray with aileron servo into
the wing as same as picture below.
Drilla hole
1.5mmdiameter.
Secure
Aileron
Control horn.
Repeat the procedure for the other wing
half.
3.INSTALLING THE AILERON
LINKAGES.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Repeat the procedure for the other wing
half.
Secure
INSTALLING THE ENGINE MOUNT.
See pictures below:
Bottom side.
4x30mm
4x30mm
Drill a hole 5mm
diameter.
4x12mm

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Pushrod wire.
Pushrod wire.
Locate the long piece of wire used for the
throttlepushrod. Oneendofthewire hasbeen
pre-bend in to a “Z” bend at the factory. This
“Z” bend should be inserted into the throttle
armofthe enginewhentheengine isfitted onto
theengine mount.Fittheengineto theengine
mount using the screws provided.
INSTALLING THE ENGINE.
Drill a hole 4mm
diameter.
Markpoint.
128mm.
Secure

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Secure.
Throttle servo
Secure.
After installing the adjustable metal con-
nector apply a small drop of thin C/A to
the bottom nut. This will prevent the con-
nector from loosening during flight.
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 mate-
rial from the arm.
INSTALLING THE THROTTLE PUSHROD.
Drill a hole
1.5mm
Throttle servo
Throttle Pushrod.
Cut
INSTALLING THE STOPPER ASSEMBLY
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.
FUEL TANK.
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.
7.Using amodelingknife,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-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,thefrontofthetank shouldjustabout
touch the back of the firewall.
Fueltank.
Tie wrap.
Left side.
Right side
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 ex-
pandsand sealsthetank opening.Do notover
tighten the assembly as this could cause the
tank to split.
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.
3.Carefully bendthesecondnylontubeup
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.
9. To secure the fuel tank in place, apply a
bead of silicon sealer to the forward area of the
tank, where it exits the fuselage behind the en-
gine mounting box and to the rear of the tank at
the forward bulkhead.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
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.
Drill2mm hole
Trimandcut.
Trimandcut.
4. Install the muffler and muffler exten-
sion onto the engine and make the cutout in
the cowl for muffler clearance. Connect the
fueland pressurelinesto thecarburetor, muf-
fler and fuel filler valve.
3. Slide the cowl back over the engine
andsecureitin placeusingfour woodscrews.
See picture below.
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.
3x12mm
Right side.
Machine screw.
Left side.
Machine screw.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Remove
covering
Secure.
Elevator servo
Left side.
Right side.
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.
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.
3 x 15mm.
ELEVATOR SERVO INSTALLATION.
Elevator
servo
Drill a hole
2mm

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YAK 54 - ITEM CODE: BH48.Instruction Manual
HORIZONTAL STABILIZER.
See pictures below:
Top side
Cutthecovering
awayfromtheslot.
Temporary pin to
keep hinge centered.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
Top side
 1. Using a modeling knife, cut away the
covering from the fuselage for the stabilizer
and remove it.


2) Using a ruler and a pen, locate the
centerlineofthehorizontalstabilizer,atthetrail-
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.Thenslide thehorizontalstabilizertheinto
the fuselage.
Top side
Center line.
Check to mark sure the wing and stabi-
lizer are paralell. If they are not, lightly sand
theopening inthefuselageforthe stabilizer
until the stabilizer is paralell to the wing.
3. 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.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
When cutting through the covering to re-
move it, cut with only enough pressure to
only cut through the covering itself. Cut-
ting into the balsa structure may weaken
it.
5. 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.
Remove covering.
Top side.
Bottom side.
A+BEpoxy
PLUSglue
4. Remove the stabilizer. Using the lines
youjustdrew asa guide,carefully removethe
coveringfrom betweenthem usingamodeling
knife.
Remove
covering.
Markline
1. Elevator control horn install as same as
theway ofaileroncontrol horn.Pleasesee pic-
tures below.
Controlhornofelevator.
ELEVATORCONTROLHORN INSTALLATION.
Top side.
Markline
Bottom side.

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YAK 54 - ITEM CODE: BH48.Instruction Manual


2) When you a sure that everything is
aligned correctly, mix up a generous amount
of 30 Minute Epoxy. Apply a thin layer to the
topandbottomofthe stabilizermounting plat-
form sides in the fuselage. Slide the stabilizer
in place and realign. Double check all of your
mea-surements once more before the epoxy
cures. Hold the stabilizer in place with T-pins
or masking tape and remove any excess ep-
oxy using a paper towel and rubbing alcohol.
Epoxyglue.
Controlhornof
elevator.
Drilla
hole3mm


3) After the epoxy has fully cured, remove
the masking tape or T-pins used to hold the
stabilizer in place. Carefully inspect the glue
joints. Use more epoxy to fill in any gaps that
may exist that were not filled previously and
clean up the excess using a paper towel and
rubbingalcohol.
C/Aglue
C/Aglue
Epoxyglue. Secure.
 Elevatorpushrod installas sameas theway
of aileron pushrod.
165mm. 3x10mm.
ELEVATOR PUSHROD INSTALLATION.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
A+B Epoxy
PLUSglue.
Bottom side.
Elevator
pushrod Elevator
pushrod
Elevator
pushrod
Cutthecovering
awayfromtheslot.
Rudder servo install as same as method of
elevatorservo.
See picture below:
Rudder control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
ControlhornofRudder.
RUDDERCONTROLHORNAND RUDDER
CABLEINSTALLATION.
Rudderservo
RUDDER SERVO NSTALLATION
Rudderservo
Control horn
Rudder.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
Temporary pin to
keep hinge centered.
Rudder cable
Bottom side.
Ruddercable.
Rudder
cable.
Elevator
pushrod.
Top side.
Rudderpush-pull
cable.


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.
3x12mm
MOUNTING THE TAIL WHEEL
BRACKET.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Secure.
MAIN GEAR INSTALATION.
PARTSREQUIRED
1. Assemble and mounting the wheel
pants as shown in the following pictures.


2. Using a pen, mark the locations of the
twomounting screws. Removethe tailwheel
bracket and drill 1mm pilot holes at the loca-
tions marked.
Secure.
Drill a hole
2mm.
Markpoint.


3. Secure the tail wheel bracket in place
using three 3mm x 12mm wood screws. Be
careful not to overtighten the screws.
Drill a hole
2mm
4x20mm
5x45mm.
Secure.

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Drill 5mm hole
Secure.
2. Adrop of C/Aglue on the wheel collar
screwswill helpkeep themfrom cominglose
duringoperation.
Repeat the procedure for the other
wheel pant .
1. The blind nuts are already mounted
inside the fuselage.
2. The holes in the landing gear should
be to accept the mounting bolts.
INSTALLING THE MAIN LANDING GEAR.
Landing gear.
3. Using the hardware provided, mount
the main landing gear to the fuselage.
Secure.
Bottom side.
4x15mm


1. Cutout theswitch holeusingamodeling
knife. Use a 2mm drill bit and drill out the two
mounting holes through the fuselage side.


2. Secure the switch in place using the
two machine screws provided with the radio
system.
INSTALLING THE SWITCH.
Switch

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YAK 54 - ITEM CODE: BH48.Instruction Manual
Battery
Receiver
1.Locatethealuminium wingdihedralbrace.
*** Test fit the aluminium tube dihedral brace
into each wing haft. The brace should slide in
easily. If not, use 220 grit sand around the
edges and ends of the brace until it fits prop-
erly.
WINGATTACHMENT.
Aluminium tube 25mm
563 mm
2. Attach the aluminium tube into the
fuselage.
Right side.
Secure.


3. Position the battery pack and receiver
behindthe fueltank. Usetwotiewraps tohold
the battery and receiver securely in place.As
pictures below.
Donot permanentlysecure thereceiverand
battery until after balancing the model.


4. Using a2mm drillbit, drilla holethrough
the side of the fuselage, near the receiver, for
the antenna to exit.


1. Plug the servo leads and the switch
leadinto the receiver. You may want to plug
anaileronextensioninto 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 vi-
bration.Use arubberbandormasking tapeto
hold the foam in place.
INSTALLINGTHE RECEIVERAND BATTERY.