Seagull Models CESSNA 152 User manual

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CESSNA 152
ASSEMBLY MANUAL
MS: 174
Specications:
Wing span ------------------------------79.9in (203cm).
Wing area -----------------911.4sq.in (58.8sq dm).
Weight ----------------------------------9.9lbs (4.5kg).
Length ------------------------------57.5in (146.0cm).
Engine ------------------ ----0.75-0.91cu.in -2-stroke.
0.91-1.25cu.in -4-stroke.
Radio ------------------- 5 channels with 8 servos.
Electric conversion: optional
“Graphics and specications may change without notice”.

CESSNA 152 Instruction Manual.
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ank you for choosing the CESSNA 152 ARTF by SEAGULL MODELS COMPANY LTD,.
e CESSNA 152 was designed with the intermediate/advanced sport yer in mind. It is a semi
scale airplane which is easy to y and quick to assemble. e airframe is onventionally built using
balsa, plywood to make it stronger than the average ARTF, yet the design allows the aeroplane
to be kept light. You will nd that most of the work has been done for you already. e motor
mount has been tted and the hinges are pre-installed. Flying the CESSNA 152 is simply a joy.
is instruction manual is designed to help you build a great ying earoplane. Please read
this manual throughly before starting assembly of your CESSNA 152. User the parts listing
below to indentify all parts.
Please be awere that this aeroplane is not a toy and if assembley or used incorrectly it is
capable of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE YOU
ASSUME ALL RISK & REPONSIBILITY.
If you are inexperianced with basic R/C ight we strongly recommend you contact your R/C
supplier and join your local R/C model Flying Club. R/C Model Flying Clubs oer a variety
of training procedures designed to help the new pilot on his way to successful R/C ight.
ey will also be able to advise on any insurance and safety regulations that may apply.
INTRODUCTION.
WARNING.
KIT CONTENTS
3
5
6
22
1
74
11
3
10

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KIT CONTENTS.
ADDITIONAL ITEMS REQUIRED.
0.75- 0.91 2-stroke.
0.91-1.25 4-stroke.
Computer radio with 7 servos.
Glow plug to suit engine.
Propeller to suit engine.
Protective foam rubber for radio
system.
TOOLS & SUPPLIES NEEDED.
ick 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.
read-lock.
Paper towels.
HINGING THE FLAP
.
.
M2x10 mm
M2x10 mm
SEA17401 Fuselage
SEA17402 Wing Set
SEA17403 Tail Set
SEA17404 Fiberglass Cowling
SEA17405 Main Landing Gear
SEA17406 Nose Landing Gear
SEA17407 Windshield and Window set
SEA17408 Decal
SEA17409 Pushrod Set
SEA17410 Wing tube
SEA17411 Fiberglass Wheel Pants

CESSNA 152 Instruction Manual.
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HINGING THE AILERON.
e control surfaces, including the ai-
lerons, elevators, and rudder, are pre-
hinged with hinges in stalled, but the
hinges are not glued in place. It is im-
perative that you properly adhere the
hinges in place per the steps that fol-
low using a high-quality thin C/A glue.
Note :
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 aileron
until the T-pin is snug against the aileron.
is will help ensure an equal amount of
hinge is on either side of the hinge line when
the aileron is mounted to the wing panel.
3) Slide the aileron on the wing panel until
there is only a slight gap. e hinge is now-
centered on the wing panel and aileron. Re-
move 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.
T-pin
Hinge.
4) Deect the aileron and completely satu-
rate each hinge with thin C/A glue. e ailer-
ons 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.
e 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.
Note :
C/A glue

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HINGING THE ELEVATOR.
5) Turn the wing panel over and deect the
aileron in the opposite direction from the
opposite side. Apply thin C/A glue to each
hinge, making sure that the C/A pene-
trates into both the aileron and wing panel.
6) Using C/A remover/debonder and a pa-
per towel, remove any excess C/A glue that
may have accumulated on the wing or in the
aileron hinge area.
7) Repeat this process with the other wing
panel, securely hinging the aileron in place.
8) Aer both ailerons are securely hinged,
rmly grasp the wing panel and aileron to
make sure the hinges are securely glued and
cannot be pulled out. Do this by carefully ap-
plying medium pressure, trying to separate
the aileron from the wing panel. Use caution
not to crush the wing structure.
Work the aileron up and down sev-
eral times to “work in” the hinges
and check for proper movement.
Note :
Glue the elevator hinges in place using the
same techniques used to hinge the ailerons.
HINGING THE RUDDER.
Glue the rudder hinges in place using the
same techniques used to hinge the ailerons.
Hinge.
INSTALL THE AILERONS CONTROL
HORN.
Fiberglass control horn
Epoxy

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.
.
.
.
INSTALL FLAP CONTROL HORN.
.
.
Aileron control horn. Epoxy
Install the ap control horn using the same
method as same as the aileron control horns.
Fiberglass control horn.
Epoxy
Aileron control horn.
Epoxy
INSTALL ELEVATOR CONTROL HORN.
Fiberglass control horn.
Epoxy
Aileron control horn.
Epoxy
INSTALL RUDDER CONTROL HORN.
Repeat steps to install the rudder control
horn as same as steps done for ailerons.

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.
.
Epoxy
Rudder control horn.
ENGINE MOUNT INSTALLATION.
1) Locate the items necessary to install the
engine mount included with your model.
4x30 mm
2) Use four 4x30mm head bolts and four
4mm washers to attach the engine mount
rails to the rewall. Tighten the screws .
Make sure to use threadlock on the screws to
help prevent them from vibrating loose.
read locker glue.
INSTALLING THE S TOPPER
ASSEMBLY
1) Using a modeling knife, carefully cut o
the rear portion of one of the 3 nylon tubes
leaving 1/2” protruding from the rear of the
stopper. is will be the fuel pick up 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.

CESSNA 152 Instruction Manual.
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Fuel tank.
Vent tube.
Fuel fill tube.
Fuel tank.
Vent tube. Fuel pick up tube.
Fuel fill tube.
Balsa.
3) Carefully bend the second nylon tube up
at a 45º angle. is tube is the vent tube.
4) Test t the stopper assembly into the tank.
It may be necessary to remove some of the
ashing around the tank opening using a
modeling knife. If ashing is present, make
sure none falls into the tank.
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. e 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 satised with the alignment of the
stopper assembly tighten the 3 x 20mm ma-
chine screw until the rubber stopper expands
and seals the tank opening. Do not over-
tighten 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 dicult to determine which is which.
7) Slide the fuel tank into the fuselage. Guide
the lines from the tank through the hole in
the rewall.
A
8) Use plywood template to hold in place the
fuel tank with C/A glue to secure the fuel
tank inside the fuselage.
Fuel pick up tube.
9) Connect the lines from the tank to the en-
gine and muer. e vent line will connect
to the muer and the line from the clunk to
the carburetor.

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.
Elevator servo.
Rudder servo.
.
.
Blow through one of the lines to ensure
the fuel lines have not become kinked inside
the fuel tank compartment. Air should ow
through easily.
INSTALLING THE FUSELAGE SERVOS.
Because the size of servos dier, you may
need to adjust the size of the precut opening
in the mount. e notch in the sides of the
mount allow the servo lead to pass through.
1) Install the rubber grommets and brass
collets onto the throttle servo. Test t the
servo into the aileron servo mount.
2) Secure the servos with the screws provid-
ed with your radio system.
rottle servo.
THROTTLE SERVO ARM INSTALLA-
TION.
Install adjustable servo connector in the
servo arm as same as picture below:
Loctite secure. Adjustable Servo
connector.
Servo arm.
1 PCS
Rudder servo arm.
rottle servo arm.
Elevator servo arm.
INSTALLING THE SWITCH.
Install the switch into the precut hole in
the side, in the fuselage.
3/32” Hole.
Trim and cut
Switch

CESSNA 152 Instruction Manual.
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wheel collar.
wheel.
Axle.
Washer.
M3.
M3.
C/A glue.
Landing Gear. wheel Pant.
Axle.
Locker glue.
wheelPant.
wheel.
M3.
M3.
wheel collar.
nut.
Washer.
WHEELS AND WHEEL PANTS.
1) Assemble and mounting the landing gear,
wheels to the wheel pants as shown inthe fol-
lowing pictures.
2) Follow diagram below for wheel pant in-
stallation:
3) A drop of C/A glue on the wheel collar
screws will help keep them from coming lose
during operation.
Repeat the process for the other wheel.

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.
INSTALLING THE MAIN LANDING
GEAR.
1) e blind nuts for securing the landing
gear are already mounted inside the fuselage.
2) Using the hardware provided, mount the
main landing gear to the fuselage.
MOUNTING THE ENGINE.
1) Position the engine with the drive washer
(150mm) forward of the rewall as shown.
2) Use a pin drill and 4mm drill bit to drill a
small indentation in the mount for the en-
gine mounting screw.
4x20 mm
150mm
3) Use a drill to drill the four holes in the
engine mount rails.
4) On the re wall has the location for the
throttle pusshrod tube (pre-drill).
5) Slide the pushrod tube in the rewall and
guide it through the fuel tank mount. Use
medium C/A to glue the tube to the rewall
and the fuel tank mount.
6) Connect the Z-bend in the 600mm throt-
tle pushrod to the outer hole of the carbure-
tor arm.
7) Slide the throttle pushrod wire into
the tube. Position the engine between the
mounts. Use four M4x30mm machine
screws to secure the engine to the mount as
shown.
4 mm
Pushrod tube hole.
Machine screw M4x30mm
Pushrod tube hole.

CESSNA 152 Instruction Manual.
1212
Drill 4mm.
8) Move the throttle stick to the closed posi-
tion and move the carburetor to closed. Use
a 2.5mm hex wrench to tighten the screw
that secures the throttle pushrod wire. Make
sure to use threadlock on the screw so it does
not vibrate loose.
LANDING GEAR INSTALLATION.
A. NOSE GEAR:
1)Locate the items necessary to attach the
nose landing gear that are included with
your model.
read locker glue.read locker glue.

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4mm hole.
Axle.
wheel collar.
wheel.
Screw.
2)Install landing gear at the top Fuselage.

CESSNA 152 Instruction Manual.
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Trim and cut.
Trim and cut.
Screw.
Drill hole 4mm.
COWLING
1) Slide the berglass 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 as shown.
Install lights at the top Cowling
M3 lock nut
.
M3 clevis.
225 mm
M3
Pushrod.

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Epoxy.
Because of the size of the cowl, it may be nec-
essary to use a needle valve extension for the
high speed needle valve. Make this out of suf-
cient 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
ush with the marks, align the front of the
cowl with the cranksha of the engine. e
front of the cowl should be positioned so the
cranksha is in nearly the middle of the cowl
opening. Use the spinner backplate as a
guide. Hold the cowl rmly in place using
pieces of masking tape.
3) Install the muer and muer extension
onto the engine and make the cutout in the
cowl for muer clearance. Connect the fuel
and pressure lines to the carburetor, muer
and fuel ller valve. Secure the cowl to fuse-
lage using the M3x10mm screws.
Needle valve
Machine screw M3x10mm
ELECTRIC POWER CONVERSION.
1) Locate the items neccessary to install
the electric power conversion included
with your model.
2) Recommendation EP parts as shown
(not included with your model).
- Model size: .60 size models
- Motor: 50mm 310 rev per volt
- Propeller: 14x10 ~ 15x10
- ESC: 60A
- Lipo Batteries: 8 cell 5200mA
3) Attach the electric motor box to the
rewall suitable with the cross lines
drawn on the electric motor box and
rewall. Using epoxy and balsa stick
to secure the motor box to the rewall.
Please see pictures below.

CESSNA 152 Instruction Manual.
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M4x20mm
4) Attach the motor to the front of the
electric motor box using four 4mm blind
nut, four M3x15mm hex head bolts to se-
cure the motor. Please see picture shown.
4mm
Blind nut.
M3x15mm
150mm
Balsa stick.
Epoxy.
Electric motor.

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Battery.
INSTALLING THE SPINNER.
Install the spinner backplate, propeller and
spinner cone.
e 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.
5) Attach the speed control to the side
of the motor box using two-sided tape
and tie wraps. Connect the appropriate
leads from the speed control to the mo-
tor. Make sure the leads will not interfere
with the operation of the motor.
Speed control.
INSTALLING THE AILERON - FLAP
SERVOS.
Servos. Small weight.
Thread.
Because the size of servos dier, you may
need to adjust the size of the precut opening in
the mount. e notch in the sides of the mount
allow the servo lead to pass through.
1) Using a small weight (Weighted fuel pick-
up works well) and string, feed the string
through the wing as indicated.

CESSNA 152 Instruction Manual.
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.
.
2) Place the servo between the mounting
blocks and space it from the hatch. Use a
pencil to mark the mounting hole locations
on the blocks.
3) Use drill bit in a pin vise to drill the mout-
ing holes in the blocks.
4) Apply 2-3 drops of thin C/A to each of the
mounting holes. Allow the C/A to cure with-
out using accelerator.
5) Use dental oss to secure the connection
so they cannot become unplugged.
6) Secure the servo to the aileron hatch using
Phillips screwdriver and the screws provided
with the servo.
7) Apply 1-2 drops of thin C/A to each of the
mounting tabs. Allow the C/A to cure with-
out using accelerator.
8) A string has been provided in the wing
to pull the aileron lead through to the wing
root. Remove the string from the wing at
the servo location and use the tape to attach
it to the servo extension lead. Pull the lead
through the wing and remove the string.

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1919
9) Set the aileron hatch in place and use a
Phillips screw driver to install it with four
wood screws.
M3 lock nut.
M3 clevis.
100mm.
.M2 lock nut.
AILERON PUSHROD HORN
INSTALLATION.
Aileron
Wing
INSTALLING THE FLAP SERVO.
Repeat the procedure for the aileron servo.

CESSNA 152 Instruction Manual.
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M2 lock nut.
M3 lock nut.
M3 clevis.
90mm.
Flap
Wing
INSTALLING THE HORIZONTAL STA-
BILIZER.
1) Using a ruler and a pen, locate the center-
line of the horizontal stabilizer, at the trailing
edge, and place a mark. Use a triangle 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.
Draw center line.
2) Using a modeling knife, carefully remove
the covering at mounting slot of horizontal
stabilizer ( both side of fuselage).
Cut
3) Slide the stabilizer into place in the precut
slot in the rear of the fuselage. e stabilizer
should be pushed rmly against the front of
the slot.
4) With the stabilizer held rmly 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 le sides and top and
bottom of the stabilizer.
Pen
5) Remove the stabilizer. Using the lines you
just drew as a guide, carefully remove the
covering from between them using a mod-
eling knife.