Black Horse Model YAK 54 Owner's manual

INSTRUCTION MANUAL BOOK
SPECIFICATION
Made in Vietnam.


 Wingspan: 1,440 mm 56.69 in.


Length: 1,250 mm 49.21 in.


Weight: 2.4-26 kg 5.28-5.72 lbs.
Parts listing required (not included).


Radio: 04 channels.


Servo: 04-05 servos, size:(21 x 42)mm.


Engine: 46 cu.in 2 stroke; 52 cu.in 4 stroke.


Motor: Brushless outrunner 1000-1800W, 800KV.


Propeller: Suit with your engine.
Recommended Motor and Battery set up


Motor: RIMFIRE.46 (not included).


Lipo cell: 6cells 4,000-5,000mAh (not included).


ESC: 60A (not included).


Receiver battery: 4.8-6V/ 800-1200mAh NiMH.

YAK 54 - ITEM CODE: BH47-A.Instruction Manual
2
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
proceduresdesignedtohelpthenewpilotonhiswaytosuccessfulR/Cflight.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.
Modelling knife.
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.
HARDWARE PACK
COWLING.
Landing gear.....
To avoid scratching your new 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-
craft and to protect the table. Keep a 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
aligned properly before gluing! This will as-
sure proper assembly. YAK 54 ARF is hand
made from natural materials, every plane is
unique and minor adjustments may have to
be made. However, you should find the fit su-
perior 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: 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-
installed rudder.
(1) Horizontal stabilizer with pre-
installed elevator halves.
SUGGESTION.
NOTE.

3
YAK 54 - ITEM CODE: BH47-A.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 clipmustbesecurelyattached
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 pro-
peller.
+ Make engine adjustments from behind the
propeller only. Do not reach around the spin-
ning propeller.
Caution: this model is not a toy!
If you are a beginner to this type of powered
model,please ask anexperienced model flyer
forhelp and support. If you attempt to operate
themodel withoutknowing whatyouare 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
Evenif you have already built a large number
ofRC 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: Blowwarm airoverthe 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
bebuilt ina veryshorttime. 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
taskscompetently-so pleaseworkslowly and
accurately.
When self-tapping screws have to be
screwedinto wood, apply a little white glue
to prevent them shaking loose: just squirt
white glue into the hole and fit the screw.
SAFETY PRECAUTION.
REPLACEMENT LARGE PARTS
REPLACEMENT SMALL PARTS
6. Fuel Tank.
3. Wheel pants.
2. Wheels
1. Aluminium landing gear.
4. Electric-engine mount.
7. Spinner.
5.Tail gear
C. Fuselage.
E.Vertical stabilizer
D.Horizontal stabilizer
B.Wings panel(B1&B2).
A. Cowling
F. Aluminium tube wing
K.Pilot

YAK 54 - ITEM CODE: BH47-A.Instruction Manual
4
 1. Install the rubber grommets and brass
eyelets onto the aileron servo.
INSTALLING THE AILERON SERVOS.
Top side
aileron
Bottom side.
2.Usinga modeling knife, remove the cov-
ering servo tray.
Temporary pin to
keep hinge centered.
Cut the covering
away from the
slot.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
Bottom side.
Remove the
covering.

5
YAK 54 - ITEM CODE: BH47-A.Instruction Manual
2. Drill through 6mm(diameter)theaileron
using the control horn as a guide and screw
the control horn in place.
Repeat the procedure for the other wing
half.
3. Install aileron control horn as same as
picture below.
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, re-
move the masking tape and the servo lead
from the thread.
4.Drill 1,5mm pilot holes through the block
of wood for each of the four mounting screws
provided with the servo. Install servo into ai-
leron servo tray as same as picture below.
Electric wire.
Thread.
Secure
Drill a hole
1.5mm
Installaileroncontrolhornassame
as picture below.
Control horn of Aileron
INSTALLING THE AILERON CONTROL HORN.
2x20mm.
Drill a hole
1.5mm
Secure.
Control horn
Aileron
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, re-
move the masking tape and the servo lead
from the thread.

YAK 54 - ITEM CODE: BH47-A.Instruction Manual
6
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.Installtheservoarm onto
the servo. The servo arm should be perpen-
dicular to the servo and point toward the mid-
dle of the wing.
INSTALLING THE AILERON
LINKAGES.
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
out from the center of the arm to accommo-
date the aileron pushrod wire.
5. Using pliers, carefully make a 90 de-
greebenddownatthemarkmade.Cutoffthe
excess wire, leaving about 4mm beyond the
bend.
Bend and
cut after.
120mm
Bottom side.
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 servo arm retainingscrew and
remove the masking tape from the aileron.
Secure.
4x12mm

7
YAK 54 - ITEM CODE: BH47-A.Instruction Manual
1.The stopper has been pre-assembled at
the factory.
2. Using a modeling knife, cut one length
of silicon fuel line (the length of silicon fuel
line is calculated by how the weighted clunk
should rest about 8mm away from the rear of
the tank and move freely inside the tank).
Connect one end of the line to the weighted
clunk and the other end to the nylon pick up
tube in the stopper.
3. Carefully bend the second nylon tube
up at a 45 degree angle (using a cigarette
lighter). This tube will be the vent tube to the
muffler.
4.Carefully bend the third nylon tube down
ata 45degreeangle (usinga cigarette lighter).
This tubewill be venttubeto the fueling valve.
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.
INSTALLING THE STOPPER ASSEMBLY
FUEL TANK.
Silicon not included
Repeat the procedure for the other wing
half.
INSTALLING THE ENGINE MOUNT.
THERE ARE TWO OPTIONS:
1. ELECTRIC MOTOR
2. ENGINE MOUNT.
1. OPTION 1: ELECTRIC MOTOR.
4x30mm
3x30mm
2. OPTION 2: ENGINE MOUNT.

YAK 54 - ITEM CODE: BH47-A.Instruction Manual
8
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. 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 stopper ex-
pandsandseals the tankopening.Do notover
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 frontofthe tankshould just about
touch the back of the firewall.
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
through easily.
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 engine mounting box and to the rear of
the tank at the forward bulkhead.
Fueltank.
Locate the long piece of wire used for the
throttlepushrod. One endof the wirehasbeen
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.
INSTALLING THE ENGINE.

9
YAK 54 - ITEM CODE: BH47-A.Instruction Manual
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.
2. While keeping the back edge of the
cowl flush with the marks, align the front of
thecowl withthe crankshaftof theengine. 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.
Secure
Pushrod wire.
Left side.
Right side.
Left side.
3. Slide the cowl back over the engine
andsecure it in place using four woodscrews.
See picture below.
Trim and cut.
Bottom side
4. Install the muffler and muffler exten-
sion onto the engine and make the cutout in
the cowl for muffler clearance. Connect the
fuel and pressure lines to the carburetor, muf-
fler and fuel filler valve.

YAK 54 - ITEM CODE: BH47-A.Instruction Manual
10
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.
After installing the adjustable metal con-
nector apply a small drop of thin C/A to the
bottom nut. This will prevent the connec-
tor from loosening during flight.
INSTALLING THE THROTTLE PUSHROD.
Secure.
Throttle servo
Throttle servo
Secure
Left side
Secure.
Right side
Installthe spinnerbackplate,propeller and
spinner cone. The spinner cone is held in
place using two 3mm x 12mm wood screws.
INSTALLING THE SPINNER.
Drill a hole
2mm
Right side
3x12mm.

11
YAK 54 - ITEM CODE: BH47-A.Instruction Manual
1. Install the rubber grommets and brass
colletsintothe elevatorservo.Testfittheservo
into the servo tray.
2. Mount the servo to the tray using the
mountingscrews providedwithyour radio sys-
tem.
Throttle pushrod
Drill a hole
1.5mm diameter
Secure.
Secure.
Elevator servo.
ELEVATOR INSTALLATION.
SERVO INSTALLATION.
Horizontal stabilize installation .
See picture below.
HORIZONTAL STABILIZER INSTALLATION.
Top side.
Cut the covering
away from the
slot.
Temporary pin to
keep hinge centered.

YAK 54 - ITEM CODE: BH47-A.Instruction Manual
12
 3. Using a modeling knife, cut away the
covering from the fuselage for the stabilizer
and remove it.
Top side
Bottom side
Elevator control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
Control horn of elevator.
ELEVATOR CONTROL HORN
INSTALLATION.
2x16mm
Secure
1) Drill through1.5mm (diameter) the el-
evator using the control horn as a guide and
screw the control horn in place.
Mark point and
drill 1.5mm.
2) Install control horn as same as picture
below.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
Check to mark sure the wing and stabi-
lizer are paralell. If they are not, lightly sand
the opening in the fuselage for the stabi-
lizeruntil thestabilizerisparalelltothe wing.
Center
line.

13
YAK 54 - ITEM CODE: BH47-A.Instruction Manual


4) Using a ruler and a pen, locate the
centerline of the horizontal stabilizer, at the
trailingedge, and place a mark. Use a traingle
and extend this mark, from back to front,
across the top of the stabilizer. Also extend
this mark down the back of the trailing edge
of the stabilizer. Then slide the horizontal
stabilizerthe into the fuselage.
Mark line.
Mark line.
5. 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.
6. Remove the stabilizer. Using the lines
youjustdrewas a guide, carefully remove the
coveringfrom between themusinga modeling
knife.
Remove
covering.
Top side.
Bottom side.


8) When you a sure that everything is
aligned correctly, mix up a generous amount
of 30 Minute Epoxy. Apply a thin layer to the
topandbottom of the stabilizer mounting 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.
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.
7. 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.

YAK 54 - ITEM CODE: BH47-A.Instruction Manual
14
Cut
Secure


9) 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
rubbing alcohol.
C/A glue.
 Elevatorpushrod installas same as the way
of aileron pushrod.
ELEVATOR PUSHROD INSTALLATION.
Elevator
pushrod.
M2 lock nut
Epoxy
glue.
Epoxy
glue.
Bottom side.
Elevator
pushrod.
Elevator
pushrod.

15
YAK 54 - ITEM CODE: BH47-A.Instruction Manual
Elevator pushrod.
Secure.
Rudder servo install as same as method of
elevator servo. See picture below:
RUDDER SERVO INSTALLATION.
Rudder servo.
Secure.
Snap
keeper.
Rudder servo.
See picture below:
VERTICAL INSTALLATION.
Cut the covering
away from the
slot.
Hinge.

YAK 54 - ITEM CODE: BH47-A.Instruction Manual
16
5. Slidetheverticalstabilizerintotheslot
in the top of the fuselage. The rear edge of
the stabilizer should be flush with the rear
edge of the fuselage and the lower rudder
hinge should engage the precut hinge slot in
the lower fuselage. The bottom edge of the
stabilizershouldalsobe firmly pushed against
the top of the horizontal stabilizer.
4. Using a modeling knife, remove the
covering from over the precut hinge slot cut
intothe lowerrear portionofthe fuselage. This
slot accepts the lower rudder hinge.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
1) Locate the two nylon control horns, two
nylon control horn backplates and four M2 x
12mm machine screws.
2) Position the rudder horn on the bottom
side of rudder.
 3) Using a 1.5mm drill bit and the control
horns as a guide, drill the mounting holes
through the rudder halves.
RUDDER CONTROL HORN INSTALLATION.
Secure.
Temporary pin to
keep hinge centered.
2 x 16mm.
Mark point and
drill 1.5mm
Control
horn rud-
der.

17
YAK 54 - ITEM CODE: BH47-A.Instruction Manual
Top side.
6. While holding the vertical stabilizer
firmly in place, use a pen and draw a line on
each side of the vertical stabilizer where it
meets the top of the fuselage.
When cutting through the covering to re-
moveit, cut with only enough pressure to only
cut through the covering itself. Cutting into
the balsa structure may weaken it.
Remove
covering.
Mark
pen.
90º
Vertical
Stabilizer.
Horizontal
Stabilizer.
7) Slide 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.
Epoxy glue.
8) When you are sure that everything is a
aligned correctly, mix up a generous amount
of 30 minute epoxy. Apply a thin layer to the
slot in the mounting platform and to the verti-
cal stabilizer mounting area. Apply epoxy to
the lower rudder hinge. Set the stabilizer in
place and re-align. Double check all of your
measurements once more before the epoxy
cures. Remove any excess epoxy using a pa-
pertowel and rubbing alcoholandholdthe sta-
bilizer in place with T-pins or masking tape.
Allow the epoxy to fully cure before proceed-
ing.
Remove
covering.
Remove
covering.

YAK 54 - ITEM CODE: BH47-A.Instruction Manual
18
Bottom side.
Rudder pushrod. Elevator
control horn.
 Rudder pushrod install as same as the way
of aileron pushrod.
RUDDER PUSHROD INSTALLATION.
Rudder
pushrod
Snap
keeper.
C/A glue.
Top side.
Rudder
pushrod.
M2 lock nut.
Bend

19
YAK 54 - ITEM CODE: BH47-A.Instruction Manual
Bottom side.
Rudder
pushrod


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 rudder
hinge line and the tail wheel bracket should
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.
3x12mm.


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
Secure
MOUNTING THE TAIL WHEEL
BRACKET.
Mark point
1. Assemble and mounting the wheel
pants as shown in the following pictures.
PARTS REQUIRED
MAIN GEAR INSTALATION.
5 X 40mm
5 X 40mm 5 X 40mm

YAK 54 - ITEM CODE: BH47-A.Instruction Manual
20
Secure
Bottom side.
3. Using the hardware provided, mount
the main landing gear to the fuselage.
1. The blind nuts are already mounted in-
side the fuselage.
2. The holes in the landing gear should
be to accept the mounting bolts.
Landing gear.
INSTALLING THE MAIN LANDING GEAR.
2. Adrop of C/Aglue on the wheel collar
screwswill help keep them from cominglose
during operation.
Repeat the procedure for the other wheel
pant .
4x15mm
Secure.
Drill a hole
5mm
Secure.