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.