Page 1
Kit features.
• Ready-made—minimal assembly & finishing required.
• Ready-covered covering.
• Photo-illustrated step-by-step Assembly Manual.
Made in Vietnam.
Specifications
Wingspan--------------------------------- 71 in --------------------- 180.3cm.
Wing area-------------------------------- 789 sq.in ------------- 50.9 sq.dm.
Weight------------------------------------ 10.1-1 1.9lbs -----------4.6-5.4 kg.
Length------------------------------------- 66.1 in ------------------- 167.9cm.
Recommended engine size---------- 1.20 cu.in ---------------- 2-stroke.
1.20-1.50---------------- 4 - stroke.
Radio System required 6 channel with 6 servos.
Flying skill level Intermediate/advanced.
MS: SEA 94.
“Graphics and Specfications may change without notice”.
PC - 9
ASSEMBLY MANUAL
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PC-9. Instruction Manual.
2
INTRODUCTION.
Thank you for choosing the PC-9 ARTF by SEAGULL MODELS. The PC-9 was designed with
the intermediate/advanced sport flyer in mind. It is a scale airplane which is easy to fly and quick
to assemble. The airframe is conventionally built using balsa, plywood to make it stronger than the
average ARTF , yet the design allows the aeroplane to be kept light. You will find that most of the work
has been done for you already. The motor mount has been fitted and the hinges are pre-installed
. Flying the PC-9 is simply a joy.
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manual thoroughly before starting assembly of your PC-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.
ADDITIONAL ITEMS REQUIRED.
1.20 cu.in 2-stroke
1.20-1.50 cu.in 4-stroke engine
Radio System required 4 channels
with 6 servos.
Propeller to suit engine
Protective foam rubber for radio
system
Silicone fuel line
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
PARTS LISTING.
FUSELAGE ASSEMBLY
(1) Fuselage
(1) Canopy hatch
WING ASSEMBLY
(1) Right wing half/ aileron
(1) Left wing half with/ aileron
(1) Midle wing.
Tail section assembly
(1) Horizontal stabilizer/ elevator
halves.
(1) Rudder halves.
Some more parts.
HARDWARE PACK
COWLING
Landing gear.....
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NOTE:To avoid scratching your new aero-
plane we suggest that you cover your
workbench with an old towel. Keep a
couple of jars or bowls handy to hold
the small parts after you open the
bags.
Please trial fit all parts. Make sure you
have the correct parts and that they fit
and are aligned properly before gluing!
This will ensure proper assembly as
the PC-9 is made from natural
materials and minor adjustments may
have to be made. The paint and
plastic parts used in this kit are fuel
proof. However, they are not tolerant
of many harsh chemicals including
the following: paint thinner, cyanoacrylate glue accelerator, cyanoacrylate glue de-bonder and acetone. Do
not let these chemicals come in
contact with the colours on the
covering and the plastic parts.
1) Carefully remove the aileron from one of
the wing panels. Note the position of the hinges.
2) Remove each hinge from the wing panel
and aileron and place a T-pin in the center of
each hinge. Slide each hinge into the wing
panel until the T-pin is snug against the wing
panel. This will help ensure an equal amount
of hinge is on either side of the hinge line when
the aileron is mounted to the aileron.
HINGING THE AILERONS.
3) Slide the wing panel on the aileron until
there is only a slight gap. The hinge is now
centered on the wing panel and aileron.
Remove the T-pins and snug the aileron
against the wing panel. A gap of 1/64” or less
should be maintained between the wing panel
and aileron.
The control surfaces, including the
ailerons, elevators, and rudder, are
prehinged with hinges installed, but the
hinges are not glued in place. It is
imperative that you properly adhere the
hinges in place per the steps that follow
using a high-quality thin C/A glue.
Note:
4)Deflect the aileron and completely
saturate each hinge with thin C/A glue. The
ailerons front surface should lightly contact the
wing during this procedure. Ideally , when the
hinges are glued in place, a 1/64” gap or less
will be maintained throughout the lengh of the
aileron to the wing panel hinge line.
Note:
The hinge is constructed of a special
material that allows the C/A to wick or
penetrate and distribute throughout the
hinge, securely bonding it to the wood
structure of the wing panel and aileron.
Hinge
Hinge.
5) Turn the wing p anel over and deflect the
aileron in the opposite direction from the
opposite side. Apply thin C/A glue to each
hinge, making sure that the C/A penetrates into
both the aileron and wing panel.
6) Using C/A remover/debonder and a paper
towel, remove any excess C/A glue that may
have accumulated on the wing or in the aileron
hinge area.
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PC-9. Instruction Manual.
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HINGING THE ELEVATOR.
HINGING THE RUDDER.
Glue the elevator hinges in place using the
same tectniques used to hinge the ailerons.
Glue the rudder hinges in place using the
same tectniques used to hinge the ailerons.
Work the aileron up and down several
times to “work in” the hinges and check
for proper movement.
Note:
Hinge.
Aileron control horn installation: See pictures
below.
AILERON CONTROL HORN
M3 LOCK
NUT.
ALUMINUM WASHER.
ALUMINUM WASHER.
CONTRONL HORN
M3 SCREW.
Epoxy.
Epoxy.
2 sets.
3x45mm.
Wing
bottom.
8) Af ter both ailerons are securely hinged,
firmly grasp the wing panel and aileron to
make sure the hinges are securely glued and
cannot be pulled out. Do this by carefully
applying medium pressure, trying to separate
the aileron from the wing panel. Use caution
not to crush the wing structure.
7) Repeat this process with the other wing
panel, securely hinging the aileron in place.
18mm.
Aileron control horn.
Aileron.
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ELEVATOR CONTROL HORN.
Install the elevator control horn using the
same method as with the aileron control
horns.
2 sets.
3x45mm.
2 sets.
3x50mm.
Elevator control horn.
Rudder control horn:
Using the same tectniques used aileron control
horn. See picture below.
RUDDER CONTROL HORN.
Rudder control horn.
ENGINE MOUNT INST ALLATION.
see pictures below.Make yourself the
template of your engine on paper .
Aluminum Washer.
CONTRONL HORN M3
M3 LOCK NUT.
Epoxy.
Aluminum Washer.
Horizontal
stabilizer
Elevator
CONTRONL HORN
M3 SCREW.
ALUMINUM WASHER.
ALUMINUM WASHER.
M3 LOCK NUT.
EPOXY .
FUSELAGE
Rudder
18mm.
EPOXY .
Fuselage.
Rudder.
Horizontal
Stabilizer .
18mm.
EPOXY .
Elevator.
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PC-9. Instruction Manual.
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Mark and drill 4 holes for engine mount.
Insert 4 blind nuts to firewall.
4x30mm.
Thread locker glue.
1) Using a modeling knife, carefully cut
off the rear portion of one of the 3 nylon tubes
leaving 1/2” protruding from the rear of the
stopper. This will be the fuel pick up tube.
INST ALLING THE STOPPER ASSEMBL Y .
3) Carefully bend the second nylon tube
up at a 45º angle. This tube is the vent tube.
4) 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 falls into the tank.
Vent tube.
Fuel pick up tube.
Fuel fill tube.
2) Using a modeling knife, cut one length
of silicon fuel line. Connect one end of the line
to the weighted fuel pick up and the other end
to the nylon pick up tube.
Carefully use a lighter or heat gun to
permenently set the angle of the vent tube.
Important: When the stopper assembly is in-
stalled 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.
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5) With the stopper assembly in place,
the weighted pick-up should rest away from
the rear of the tank and move freely inside the
tank. The top of the vent tube should rest just
below the top of the tank. It should not touch
the top of the tank.
6) When satisfied with the alignment of
the stopper assembly tighten the 3 x 20mm
machine screw until the rubber stopper expands and seals the tank opening. Do not
overtighten the assembly as this could cause
the tank to split.
FUEL TANK INSTALLATION.
You should mark which tube is the vent
and which is the fuel pickup when you attach
fuel tubing to the tubes in the stopper. Once
the tank is installed inside the fuselage, it may
be difficult to determine which is which.
Rubber band.
Fuel tank.
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.
4) Remove the engine. Using an drill bit,
drill the mounting holes through the engine
mount at the four locations marked.
3) When you are satisfied with the alignment, mark the locations of the engine
mounting.
1) Install the pushrod housing through the
predrilled hole in the firewall and into the servo
compartment. The pushrod housing should
protrude 1/4" out past the front of the firewall.
Make a Z-Bend 1/4" from one end of the plain
wire pushrod.
MOUNTING THE ENGINE.
2) Place your engine onto the engine
mount. Adjust the engine is centered of the
edges of the engine case.
Fuel pick-up tube.
Fuel fill tube.
Vent tube.
1 _ Glow Engine .
2 _ Electric Conversion(EP Power).
(OPTION).
Picture and instruction will update soon.
C/A glue.
M3 x 10mm.
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PC-9. Instruction Manual.
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6) Attach the Z-Bend in the pushrod wire to
the throttle arm on the carburetor.
5) Bolt the engine to the engine mount using
the four machine screws. Double check that
all the screws are tight before proceeding.
Pushrod wire.
Machine Screw M4x30mm.
Because of the size of the cowl, it may be necessary to use a needle valve extension for the
high speed needle valve. Make this out of sufficient length 1.5mm wire and install it into the
end of the needle valve. Secure the wire in
place by tightening the set screw in the side of
the needle valve.
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. Use the spinner backplate as a guide.
Hold the cowl firmly in place using pieces of
masking tape.
COWLING INST ALLA TION.
1) Slide the fiberglass cowl over the engine and line up the back edge of the cowl with
the marks you made on the fuselage then trim
and cut.
Trim and cut.
Trim and cut.
Trim and cut.
4.2 mm diameter.
150mm.
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3) Install the muffler and muffler extension
onto the engine and make the cut out in the
cowl for muffler clearance. Connect the fuel
and pressure lines to the carburetor, muffler
and fuel filler valve. Secure the cowl to fuselage using the M3x10mm screws (4).
needle valve.
Install the spinner backplate, propeller and
spinner cone.
SPINNER INSTALLATION.
Machine Screw M3x10mm.
.
The propeller should not touch any part
of the spinner cone. If it does, use a sharp
modeling knife and carefully trim away the
spinner cone where the propeller comes in
contact with it.
2) Secure the servos with the screws provided with your radio system.
INSTALLING THE FUSELAGE SERVO.
1) Install the rubber grommets and brass
collets onto the throttle servo. T est fit the servo
into the aileron servo mount.
Because the size of servos differ, you
may need to adjust the size of the precut opening in the mount. The notch in the sides of the
mount allow the servo lead to pass through
.
Machine Screw M3x10mm.
.
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PC-9. Instruction Manual.
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Switch.
Install adjustable servo connector in the servo
arm .
Adjustable Servo
connector.
Servo arm.
Loctite secure.
2 PCS.
Throttle servo arm.
Rudder.
INSTALLING THE SWITCH.
Install the switch into the precut hole in the
side of fuselage.
Throttle servo .
Stearing servo arm.
Retract servo.
Elevator servo .
Cut .
Rudder servo .
Stearing servo.
Retract servo.
THROTTLE-RETRACT SERVO ARM
INSTALLATION.
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Servo for retractable only .
Metal connector.
Servo arm.
25mm.
SERVO GEAR INSTALLATION.
Servo arm.
Loctile
secure.
Adjustable servo
connector.
25mm.
145mm.
135mm.
Electric wire.
Wing bottom.
PUSHROD INSTALLATION.
Remove covering.
M3 x 15mm.
GEAR INST ALLA TION.
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PC-9. Instruction Manual.
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Open Position
servo arm.
M3 x 15mm.
Axle.
Wheel.
Landing gear.
Wheel collar.
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servo arm.
12mm.
Close Position.
Attach the string to the servo lead and carefully thread it though the wing.
String.
INSTALLING THE AILERON SERVOS.
Wing.
Small Weight.
Wing.
Wing rib.
String.
Small Weight.
Installing the aileron servo in place using the
same techniques used to flap servo.
Servos.
Small weight.
Thread.
String.
Small weight.
AILERON PUSHROD HORN INST ALLA TION
Aileron.
90mm.
INSTALLING THE AILERON SERVOS.
25mm.
M3 lock nut.
M3 clevis.
110mm.
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PC-9. Instruction Manual.
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Masking tape.
Epoxy.
1) Test fit the wing tube into each wing half.
The brace should slide in easily up to the
centreline that you drew. If not, use 220 grit
sandpaper with a sanding block and sand
down the edges and ends of the brace until it
fits properly.
2) Remove the brace when satisfied with its
fit in each wing half. Coat both sides of one half
of the dihedral brace with 30 minute epoxy.
Next, pour some epoxy into the dihedral box in
one wing panel. Make sure you cover the top
and bottom as well as the sides of the dihedral
brace. Use enough epoxy to fill any gaps.
Repeat the procedure for the other wing.
Wing.
Aileron.
M3 lock nut.
WING ASSEMBLY.
NOTE: We highly recommend using 30
minute epoxy as it is stronger and provides
more working time, allowing the builder to
properly align the parts. Using fast cure epoxy
when joining the wing halves could result in the
glue drying before the wing halves are aligned
properly which may result in failure of the wing
centre section during flight.
Aileron.
Wing.
Wing.
Aileron.
Carefully slide the two wing halves together
and firmly press them together, allowing the
excess epoxy to run out. There should not be
any gap in the wing halves. Use rubbing
alcohol and a paper tower to clean up any
excess epoxy.
Apply masking tape at the wing join to hold
the wing halves together securely .
AILERON PUSHROD HORN INST ALLA TION
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Remove the covering.
INST ALLING THE HORIZONT AL ST ABILIZER.
Remove the covering.
3) Peel off the backing from the self adhesive covering strip. Apply the strip to the centre
section of the wing starting from the bottom
trailing edge. Wrap the strip all the way around
the wing until it meets the trailing edge again.
Trim off any excess strip.
Epoxy.
Epoxy.
WING TIP INST ALLA TION.
Masking tape.
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PC-9. Instruction Manual.
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Pen.
Remove the covering.
INST ALLING THE VERITICAL ST ABILIZER.
Rudder control horn.
Pen.
Epoxy.
Remove the covering.
Epoxy.
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M2 clevis.
Attach to servo arm in fuselage.
Throttle.
Stearing servo.
1) Elevator and rudder pushrods assembly
follow pictures below.
M2 Lock nut.
Attach to elevator - rudder control horn.
ELEVATOR - RUDDER PUSHROD HORN
INSTALLATION.
2) Install servos arm to servos. Notice the
position of the servo arms on the servos. See
picture below.
Rudder sevor.
Elevator .
Epoxy .
Cable pull pul system.
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PC-9. Instruction Manual.
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MOUNTING THE NOSE WHEEL.
See picture below.
M3 x 25mm.
Wheel.
Wheel collar.
Landing gear.
Axle.
Wheel collar.
Wheel.
Control horn.
Elevator Pushrod.
Metal clevis.
M3lock nut.
M3 x 4mm.
Rudder pushrod.
M2 lock nut.
M3 lock nut.
M3 clevis.
155mm.
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OPTIONAL PARTS INSTALLING .
Battery.
Tie Wrap.
INSTALLING THE BATTERY.
Stearing sevor .
Throttle.
Rudder.
Battery.
Plastic Screw.
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PC-9. Instruction Manual.
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3) Route the antenna in the antenna tube
inside the fuselage and secure it to the bottom of fuselage using a plastic tape. See picture below.
1) Plug the servo leads and the switch
lead into the receiver. Plug the battery pack
lead into the switch also.
2) Wrap the receiver and battery pack in
the protective foam rubber to protect them
from vibration.
INSTALLING THE RECEIVER.
Receiver.
Tie Wrap.
Bolt the wing to fuselage.
ATTACHMENT WING - FUSELAGE.
INSTALLTION PILOT.
45mm.
363mm.
5mm.
180mm.
5mm.
5mm.
M2 x 6mm.
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BALANCING.
1) It is critical that your airplane be balanced
correctly. Improper balance will cause your
plane to lose control and crash. The center of
gravity is located 70mm back from the leading edge of the wing, measured at the wing
tip.
2) If the nose of the plane falls, the plane is
nose heavy . To correct this first move the battery pack further back in the fuselage. If this is
not possible or does not correct it, stick small
amounts of lead weight on the fuselage sides
under the horizontal stabilizer . If the tail of the
plane falls, the plane is tail heavy .
When balanced correctly, the airplane should
sit level or slightly nose down when you lift it
up with your fingers.
To correct this, move the battery and receiver
forward or if this is not possible, stick weight
onto the firewall or use a brass heavy hub spinner hub.
2) Turn on the radio system, and with the
trim tabs on the transmitter in neutral, center
the control surfaces by making adjustments
to the clevises or adjustable servo connectors.
The servo arms should be centered also.
1) We highly recommend setting up the
PC-9 using the control throws listed at right.
We have listed control throws for Low Rate
(initial test flying/sport flying) (aerobatic flying).
CONTROL THROWS.
3) When the elevator, rudder and aileron
control surfaces are centered, use a ruler and
check the amount of the control throw in each
surface. The control throws should be
measured at the widest point of each surface!
Do not use the aerobatic settings for
initial test flying or sport flying.
Ailerons: 3/16” up 3/16” down
Elevator: 5/16” up 5/16” down
Rudder: 3/4” right 3/4” left
AEROBATIC FLYING
Ailerons: 3/8” up 3/8” down
Elevator: 5/8” up 5/8”down
Rudder: 1-1/4” right 1-1/4” left
Wing bolt.
70mm.
A.
A.
C/A glue.
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PC-9. Instruction Manual.
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8) Properly balance the propeller. An out
of balance propeller will cause excessive vibration which could lead to engine and/or airframe failure.
We wish you many safe and enjoyable
flights with your PC-9.
7) Check the receiver antenna. It should
be fully extended and not coiled up inside the
fuselage.
F)From behind the airplane, look at the
aileron on the right wing half. Move the aileron
stick to the right. The right aileron should move
up and the other aileron should move down. If
it does not, flip the servo reversing switch on
your transmitter to change the direction.
D) Check the rudder. Looking from behind the airplane, move the rudder stick to the
right. The rudder should move to the right. If it
does not, flip the servo reversing switch on
your transmitter to change the direction.
FLIGHT PREPARATION.
B) Plug in your radio system per the
manufacturer's instructions and turn everything on.
C) Check the elevator first. Pull back on
the elevator stick. The elevator halves should
move up. If it they do not, flip the servo reversing switch on your transmitter to change
the direction.
A) Check the operation and direction of
the elevator, rudder, ailerons and throttle.
5) If your radio transmitter is equipped
with dual rate switches double check that they
are on the low rate setting for your first few
flights.
6) Check to ensure the control surfaces
are moving the proper amount for both low
and high rate settings.
4) Check the control surfaces. All should
move in the correct direction and not bind in
any way .
3) Double check the balance of the airplane. Do this with the fuel tank empty.
2) Check every bolt and every glue joint
in the PC-9 to ensure that everything is tight
and well bonded.
E)Check the throttle. Moving the throttle
stick forward should open the carburetor barrel. If it does not, flip the servo reversing switch
on your transmitter to change the direction.
PREFLIGHT CHECK.
1) Completely charge your transmitter
and receiver batteries before your first day of
flying.
4) By moving the position of the adjustable control horn out from the control surface,
you will decrease the amount of throw of that
control surface. Moving the adjustable control horn toward the control surface will increase the amount of throw.
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