Black Horse Model PC-9 ARF BH79 Owner's manual

SPECIFICATION


 Wingspan : 1,550 mm 61.02 in.


 Length : 1,580 mm 62.20 in.


 Weight : 4,0 kg 8.80 Lbs.


 Radio : 06 channels.


 Servo : 08 servos.


 Engine : 61 2 stroke.
91 4 stroke.
Made in Vietnam.
Item code: BH79.
Instruction Manual book

2
PC-9 - Item code: BH79. 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 P.C-9. 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.
If you are inexperienced with basic R/C flight we strongly recommend you contact your R/C supplier
and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training
procedures designed to help the new pilot on his way to successful R/C flight. They will also be able
to advise on any insurance and safety regulations that may apply.
TOOLS & SUPPLIES NEEDED
1Thick cyanoacrylate glue.
130 minute epoxy.
15 minute epoxy.
1Hand or electric drill.
1Assorted drill bits.
1Modelling knife.
1Straight edge ruler.
12mm ball driver.
1Phillips head screwdriver.
1220 grit sandpaper.
190° square or builder’s triangle.
1Wire cutters.
1Masking tape & T-pins.
1Thread-lock.
1Paper towels.
Some more parts.
HARDWAREPACK
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 af-
ter you open the bag.
Please trial fit all the parts. Make sure you have
the correct parts and that they fit and are
aligned properly before gluing! This will assure
proper assembly. P.C-9 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 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: paint thinner, C/A glue accelerator, C/A glue
debonder and acetone. Do not let these chemi-
cals come in contact with the colors on the
covering and the plastic parts.
PARTS LISTING
FUSELAGE ASSEMBLY
1(1) Fuselage.
WING ASSEMBLY
1(1) Right wing half with pre-installed
aileron.
1(1) Left wing half with pre-installed
aileron.
Tail section assembly
1(1) Vertical stabilizer with pre-
installed rudder.
1(1) Horizontal stabilizer with pre-
installed elevator halves.
SUGGESTION
NOTE.

3
PC-9 - Item code: BH79. Instruction Manual.
Caution: this model is not a toy!
If you are a beginner to this type of powered
model, please ask an experienced model flyer
for help 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 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.
+ 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 propel-
ler.
+ Make engine adjustments from behind the
propeller only. Do not reach around the spin-
ning propeller.
SAFETY PRECAUTION.
REPLACEMENT SMALL PARTS
B. Wing panel.
C. Fuselage.
A. Cowling.
D . Horizontal stabilizer.
F. Aluminium wing dihedral brace.
E. Vertical stabilizer
G. Decal sheet.
C
D
E
B
F
A
B
B
G

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PC-9 - Item code: BH79. Instruction Manual.
2. Air retract (Nose gear).
1. Air retracts (Main gear).
3. Wheels.
4. Valve control.
5. Air line sets.
6. Valve one way.
7. 3 way connector.
8. 4 way connector.
9.Air tank
10.Plastic parts for bottom fuselage.
11.Plastic parts for top fuselage.
12. Spinner
1) Install the rubber grommets and brass
eyelets onto the aileron servos.
Flap
Aileron
Bottom side
C/A glue
1.INSTALLING THE AILERON SERVOS.
I. AILERON.
13. Engine plastic.
C/A glue
14.Plastic part for rudder.
15.Fuel tank.
Top side
C/A glue
Bottom side
C/A glue
13.
1.
9.
6.
2.
3.
4.
5.
10
11
12
15.
14
7.
8.

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PC-9 - Item code: BH79. Instruction Manual.
2) Using a modeling knife, remove the cov-
ering at possition show below.
C/A glue
C/A glue
C/A glue
C/A glue
Bottom side
Remove
covering
Secure
Bottom side
Flap
Aileron

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PC-9 - Item code: BH79. Instruction Manual.
4) Drill 1,6mm pilot holes through the block
of wood for each of the four mounting screws
provided with the servo.
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.
5. Instal servo tray with aileron servo into
the wing as same as picture below.
2x10mm.
3mm x 40mm.
Nilon control clasp .
M3 lock nut.
Aileron control horn
Bottom side
Thread
Electric way
Bottom side
Secure
2.INSTALLING THE AILERON CONTROL HORN.
Remove covering

7
PC-9 - Item code: BH79. Instruction Manual.
Repeat the procedure for the other wing
half.
Installing the aileron linkages as pictures
below.
INSTALLING THE AILERON
LINKAGES.
Elevator
control horn
C/A glue
M3
M3 lock nut
70mm
C/A glue

8
PC-9 - Item code: BH79. Instruction Manual.
Flap
control horn.
Bottom side
Thread
Electric way
2x10mm.
Secure
INSTALLING THE FLAP SERVO .

9
PC-9 - Item code: BH79. Instruction Manual.
Repeat the procedure for the other wing
half.
Installing the flap linkages as pictures
below.
C/A glue
C/A glue
M3
M3 lock nut
70mm
INSTALLING THE FLAP
LINKAGES.
INSTALLING THE FLAP CONTROL HORN.
Nilon control clasp.
3 x 40mm
M3 lock nut
Remove covering
INSTALLING AIR RETRACTABLE
LANDING GEAR.
Repeat the procedure for the other wing half.
Bottom of left wing.
Bottom of right wing.
3x15mm 3 x 15mm

10
PC-9 - Item code: BH79. Instruction Manual.
Secure
Mark point
3 x 15mm
Secure

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PC-9 - Item code: BH79. Instruction Manual.
Top side
Bottom side
Locate the aluminium wing dihedral
brace.
WINGATTACHMENT.
*** 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.

12
PC-9 - Item code: BH79. Instruction Manual.
Secure
See pictures below:
INSTALLING THE ENGINE MOUNT.
4 x 30mm
4 x 30mm
Drill a hole 3mm
diameter
4 x 30mm
Secure
Drill a hole 3mm
diameter

13
PC-9 - Item code: BH79. Instruction Manual.
Drill a hole
2mm diameter
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
at a 45 degree angle (using a cigarette lighter).
This tube will be vent tube to the fueling valve.
INSTALLING THE STOPPER ASSEMBLY
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
FUEL TANK.
end of the line to the weighted clunk and the
other end to the nylon pick up tube in the stop-
per.
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.
Silicon tube not
included.

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PC-9 - Item code: BH79. Instruction Manual.
6. When satisfied with the alignment of the
stopper assembly tighten the 3mm x 20mm
machine screw until the rubber stopper ex-
pands and seals the tank opening. Do not over
tighten the assembly as this could cause the
tank to split.
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 front of the tank should just about
touch the back of the firewall.
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.
Blow through one of the lines to ensure
the fuel lines have not become kinked inside
the fuel t ank 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.
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.
Locate the long piece of wire used for the
throttle pushrod. One end of the wire has been
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.
Secure
Fuel tank.
INSTALLING THE ENGINE.
130mm

15
PC-9 - Item code: BH79. Instruction Manual.
Mark point
Drill a hole
4mm diameter.
Pushrod wire
4 x 30mm
Secure
Left side

16
PC-9 - Item code: BH79. Instruction Manual.
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.
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.
3. Slide the cowl back over the engine
and secure it in place using four wood screws.
See picture below.
4. Install the muffler and muffler extension
onto the engine and make the cutout in the
cowl for muffler clearance. Connect the fuel
and pressure lines to the carburetor , muffler
and fuel filler valve.
Right side
Left side
3 x 12mm
Right side
Trim and cut
Bottom side

17
PC-9 - Item code: BH79. Instruction Manual.
Machine screw.
Bottom side
Front view.
INSTALLING THE SPINNER.
spinner cone. The spinner cone is held in
place using two 3mm x 12mm wood screws.
Install the spinner backplate, propeller and
3 x 12mm
 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.
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.
Throttle servo
Servo arm.
Connector.

18
PC-9 - Item code: BH79. Instruction Manual.
SERVO INSTALLATION.
ELEVATOR INSTALLATION.
2. Mount the servo to the tray using the
mounting screws provided with your radio sys-
tem.
1. Install the rubber grommets and brass
collets into the elevator servo. Test fit the servo
into the servo tray.
See pictures below:
HORIZONTAL STABILIZER.
Secure
Cut
Throttle pushrod
Throttle
servo
C/A glue

19
PC-9 - Item code: BH79. Instruction Manual.
C/A glue
1. Draw a center line onto the horizontal
stabilizer. Then slide the horizont al into the
fuselage.
2 Using a modeling knife, cut away the
covering from the fuselage for the stabilizer
and remove it.
C/A glue
C/A glue
Center line
3. Mark the shape of the vertical on the left
and right sides onto the horizontal stabilizer
using a left-tip pen.
Remove covering
4. Remove the stabilizer. Using the lines
you just drew as a guide, carefully remove the
covering from between them using a modeling
knife.
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
Mark line

20
PC-9 - Item code: BH79. Instruction Manual.
Remove covering
Check to mark sure the wing and stabi-
lizer are paralell. If they are not, lightly sand
the opening in the fuselage for the stabilizer
until the stabilizer is paralell to the wing.
Epoxy glue
C/A glue
C/A glue