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ASSEMBLY MANUAL
www.seagullmodels.com
Specications:
Wingspan---------------70.9 in (180 cm).
Wing area---------------1033.2 sq.in (66.7 sq.dm).
Weight-------------------7.7 lbs (3.5 kg).
Length-------------------57.8 in (146.8 cm).
Engine-------------------10cc - 15cc gasoline
----------------------------.60 -.91 glow engine
----------------------------1200-1500 Watt Brushless Motor
Radio---------------------4 channels with 5 servos.
Electric conversion: Optional.
“ Graphics and specications may change without notice “ .
Code : SEA255
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CLASSIC UGLY STICK
Instruction Manual.
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ank you for choosing the CLASSIC UGLY STICK ARTF by SEAGULL MODELS
COMPANY LTD,. e CLASSIC UGLY STICK was designed with the intermediate/
advanced sport yer in mind. It is a sport airplane which is easy to y and quick to assemble. e 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
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 CLASSIC UGLY STICK is simply a joy.
is instruction manual is designed to help you build a great ying aeroplane. Please read
this manual throughly before starting assembly of your CLASSIC UGLY STICK . Use the
parts listing below to indentify all parts.
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 & REPONSIBILITY.
If you are inexperienced 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 oer 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
1
2
3
3
2
4
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KIT CONTENTS.
SEA255 CLASSIC UGLY STICK
SEA25501 Fuselage
SEA25502 Wing set
SEA25503 Tail set
SEA25504 Aluminum tube
ADDITIONAL ITEMS REQUIRED.
� 10cc-15cc gasoline engine.
� .60 - .91 glow engine.
� 1200-1500 Watt Brushless Motor.
� Computer radio with 5 servos.
� Glow plug to suit engine.
� Propeller to suit engine.
� Protective foam rubber for radio
system.
TOOLS & SUPPLIES NEEDED.
in 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 AILERON.
Note : e control surfaces, including the ai-
lerons, 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.
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. is will help ensure an equal amount
of hinge is on either side of the hinge line
when the aileron is mounted to the aileron.
3) Slide the wing panel on the aileron until
there is only a slight gap. e 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.
Hinge.
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Instruction Manual.
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8) Aer 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 applying 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 several times to “work in” the hinges
and check for proper movement.
Note :
NOTE : 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.
C/A glue.
4) Deect the aileron and completely saturate each hinge with thin C/A glue. e 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.
5) Turn the wing panel over and deect 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.
7) Repeat this process with the other wing
panel, securely hinging the aileron in place.
INSTALL THE AILERONS
CONTROL HORN.
Aileron control horn.
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WING ASSEMBLY.
Please see below pictures.
Attach the aluminum tube into wing.
Ep oxy.
INSTALLING THE AILERON SERVOS.
Servos
.
Small
weight
.
Thread
1) Install the rubber grommets and brass
collets onto the aileron servo. Test t the
servo into the aileron servo mount.
Because the size of servos dier, you may
need to adjust the size of the precut openingin
the mount. e notch in the sides of the mount
allow the servo lead to pass through.
2) Using a small weight (Weighted fuel pickup works well) and thread, feed the string
through the wing as indicated.
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Instruction Manual.
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.
.
Electric wire.
3) Attach servo lead to the aileron servo. Attach the string to the servo lead and carefully
thread it though the wing. Once you have
thread the lead throught the wing, remove
the string so it can use for the other servo
lead.
4) Tape the servo lead to the wing to prevent
it from falling back into the wing.
5) Reinstall the servo into the servo mount
and secure the servo inplace using the wood
screws provided with you radio system.
Plastic tape.
Thread.
Repeat the procedure for the other wing half.
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AILERON PUSHROD HORN
INSTALLATION.
Please see below pictures.
Use a felt tip pen to mark the wire where
it crosses the hole. Use a pair of pliers to
put a shrp 90-degree bend in the wire at
the mark.
Mark.
Bend at the mark
8mm
M2 lock nut.
Metal clevis.
Snap keeper.
Snap keeper.
Servo arm.
Fuel tubing.
Hex Nut.
Nylon Snap keeper.
ATTACHMENT WING- FUSELAGE.
Please see below pictures.
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Instruction Manual.
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INSTALLING THE RECEIVER SWITCH.
Install the switch into the precut hole in
the side, in the fuselage.
3/32” Hole.
Trim and cut.
Wing bolt.
1) Install the rubber grommets and brass
collets onto all servos. Test t the servos
into the servo mount.
2) Secure the servos with the screws provided with your radio system.
Rudder servo.
Elevator servo.
rottle servo.
INSTALLING THE FUSELAGE SERVOS.
.
Because the size of servos dier, 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.
.
THROTTLE SERVO ARM
INSTALLATION.
Install adjustable servo connector in the
servo arm as same as picture below:
Loctite
secure.
Adjustable servo
connector.
Servo arm.
rottle servo arm.
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.
Switch.
INSTALLING THE ENGINE SWITCH.
Trim and cut.
Switch.
INSTALLING THE STOPPER
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.
Vent tube.
Fuel pick up
Fuel fill tube.
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.
A
B
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Instruction Manual.
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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. 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 satised 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 dicult 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.
8) Use plywood template to hold in place the
fuel tank with C/A glue to secure the fuel
tank inside the fuselage.
C/A glue.
A
Ignition Module.
9) Connect the lines from the tank to the engine and muer. e vent line will connect
to the muer and the line from the clunk to
the carburetor.
Vent tube.
Fuel pick up tube.
Fuel ll tube.
C/A glue.
Balsa wood.
B
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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.
ENGINE MOUNT INSTALLATION.
1) Locate the items necessary to install
the engine mount included with your
model.
.
4x30mm
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.
MOUNTING THE ENGINE.
1) Position the engine with the drive
washer (140mm) forward of the rewall
as shown.
140mm
2) Use a pin drill and 4mm drill bit to
drill a small indentation in the mount for
the engine mounting screw.
4mm
3) Use a drill to drill the four holes in the
engine mount rails.
4mm
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.
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Instruction Manual.
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M4x30mm
Pushrod wire.
8) Reinstall the servo horn by sliding the
connector over the pushrod wire. Center
the throttle stick and trim and install the
servo horn perpendicular to the servo
center line.
9) Move the throttle stick to the closed position 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.
6) Connect the Z-bend in the 450mm
throttle pushrod to the outer hole of the
carburetor 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.
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ELECTRIC POWER CONVERSION.
1) Locate the items neccessary to install
the electric power conversion included
with your model.
- Motor : .60
- Propeller: 14x 8 ~ 16x10
- ESC: 60A
- 5S-7S Lipo
2) 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 below pictures.
3mm.
4mm.
Blind nut.
4mm.
M4x60mm
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Instruction Manual.
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3x15mm.
Bat ter y.
INSTALLING THE SPINNER.
Speed control.
Tie wraps.
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1) e blind nuts for securing the landing gear are already mounted inside the
fuselage.
NOTE : You must now decide if you will
assemble the Classic Ugly Stick with tricycle landing gear or as a tail dragger. If
you are assembling as a tail dragger, please
skip the nose gear installation steps and
mount the main gear to the FORWARD
mounting location. If you are assembling
using the tricycle landing gear, please skip
the tail wheel installation steps, Install the
nose gear, and mount the main gear to the
REAR mounting location.
2) Using the hardware provided, mount
the main landing gear to the fuselage.
3) Place the fuselage inverted on the work
bench in a suitable stand. Set the landing
gear in place and use a screwdrive to secure the landing gear to the fuselage using bolts M4x20mm and washers. Make
sure to use the threadlock on the bolts so
they don’t vibrate loose.
INSTALLING THE MAIN
LANDING GEAR.
Col lar.
Col lar.
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.
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Instruction Manual.
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M4x20mm.
M4x20mm.
NOSE GEAR INSTALLATION.
Please see below pictures
Col lar.
Col lar.
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Steering arm.
Metal clevis.
HINGING THE ELEVATORS.
Glue the elevator hinges in place using
the same techniques used to hinge the ailerons.
HORIZONTAL STABILIZER.
1) Using a ruler and a pen, locate the centerline 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 from over the vertical stabilizer
mounting slot in the top of the fuselage.
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.
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Instruction Manual.
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4) With the stabilizer held rmly in place,
use a pen and draw lines onto the stabilizer
where it and the fuselage sides meet.
Pen.
5) Remove the stabilizer. Using the lines you
just drew as a guide, carefully remove the
covering from between them using a modeling knife.
Remove the covering
When cutting through the covering to remove it, cut with only enough
pressure to only cut through the covering
itself. Cutting into the balsa structure may
weaken it.
6) Using a modeling knife, carefully remove
the covering that overlaps the stabilizer
mounting platform sides in the fuselage.
Knife.
Knife.
Epoxy
Epoxy
7) When you are sure that everything is
aligned correctly, mix up a generous amount
of 30 Minute Epoxy. Apply a thin layer to
the top of the stabilizer mounting area and
to the stabilizer mounting platform on the
bottom of the fuselage. Put the stabilizer in
place and realign. Double check all of your
meas¬urements once more before the epoxy
cures. Hold the stabilizer in place with Tpins or masking tape and remove any excess
epoxy using a paper towel and rubbing alcohol.
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VERTICAL STABILIZER
INSTALLATION.
1) Slide the vertical stabilizer into the slot in
the top of the fuselage. e rear edge of the
stabilizer should be ush with the rear edge
of the fuselage and the lower rudder hinge
should engage the precut hinge slot in the
lower fuselage. e bottom edge of the stabilizer should also be rmly pushed against
the top of the horizontal stabilizer.
2) While holding the vertical stabilizer rmly in place, use a pen and draw a line on each
side of the vertical stabilizer where it meets
the top of the fuselage.
3) Remove the stabilizer. Using a modeling
knife, remove the covering from below the
lines you drew.
Remove the covering
Knife.
When cutting through the covering to remove it, cut with only enough pressure to only
cut through the covering itself. Cutting into the
balsa structure may weaken it.
4) Slide the vertical stabilizer back in place.
Using a triangle, check to ensure that the vertical stabilizer is aligned 90º to the horizontal
stabilizer.
Pen
90º
Vertical
Stabilizer.
Horizontal
Stabilizer.
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Instruction Manual.
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5) When you are sure that everything is
aligned correctly, mix up a generous amount
of 30 Minute Epoxy. Apply a thin layer to the
mounting slot in the top of the fuselage and
to the sides and bottom of the vertical stabilizer mounting area. Set the stabilizer in
place and realign. Double check alignment
once more before the epoxy cures. Hold the
stabilizer in place with masking tape and remove any excess epoxy using a paper towel
and rubbing al¬cohol. Allow the epoxy to
fully cure before proceeding.
If you are installing the tail wheel bracket,
follow the instructions below. If you have
already installed the nose wheel assembly,
please skip to hinging the rudder.
TAIL - DRAGGER CONVERSION.
M3x20mm.
1) Test t the tail gear to make sure that
it ts properly. When you are happy with
the t, attach the tail gear using the two
M3x20mm wood screws.
2) See below pictures how to assembly
the tail- dragger conversion.
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Rudder control horn.
Elevator control horn.
INSTALL ELEVATOR - RUDDER CONTROL
HORN.
Elevator control horn.
Rudder control horn.
2) Elevator and rudder pushrods assembly as pictures below.
M2 lock nut.
M2 clevis.
Cut.
ELEVATOR - RUDDER PUSHROD
HORN INSTALLATION.
1) Locate items necessary to install elevator and rudder pushrod.
8mm
3) Hold the rudder in place and mark it
where the music wire will enter. When
you are happy with the t, ll the hole
with epoxy and use CA to glue in the
rudder hinges.
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Instruction Manual.
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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 100 MM BACK
FROM THE LEADING EDGE OF
THE WING AT THE WING ROOT.
M2 clevis.
Fuel tubing.
Hex nut.
Elevator pushrod.
Rudder pushrod.
INSTALLING BATTERY - RECEIVER.
1) Plug the ve 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.
Receiver.
Bat ter y.
Bat ter y.
8mm
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3) With the model upright, place your
ngers on the masking tape and carefully
li the plane.
2) Mount the wing to the fuselage. Using
a couple of pieces of masking tape, place
them on the bottom of the wing 100mm
back from the leading edge of the wing at
the wing root.
e balance point is located 100 mm
back from the leading edge of the wing
at the wing root. is is the balance point
at which your model should balance for
your rst ights. Later, you may wish to
experiment by shiing the balance up
to 10mm forward or back to change the
ying characteristics. Moving the balance forward may improve the smoothness and arrow- like tracking, but it
may then require more speed for take
o and make it more dicult to slow
down for landing. Moving the balance a
makes the model more agile with a lighter and snappier ”feel”. In any case,please
start at the location we recommend
With the wing attached to the fuselage,
all parts of the model installed ( ready to
y), and empty fuel tanks, hold the model
at the marked balance point with the stabilizer level.
Li the model. If the tail drops when
you li, the model is “tail heavy” and you
must add weight* to the nose. If the nose
drops, it is “nose heavy” and you must
add weight* to the tail to balance.
*If possible, rst attempt to balance the
model by changing the position of the receiver battery and receiver. If you are unable to obtain good balance by doing so,
then it will be necessary to add weight to
the nose or tail to achieve the
proper balance point.
CONTROL THROWS.
100 mm
Ailerons:
12mm - 15mm up.
12mm - 15mm down.
Elevator:
12mm - 15mm up.
12mm - 15mm down.
Rudder:
20mm - 30mm le.
20mm - 30mm right.
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Instruction Manual.
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FLIGHT PREPARATION. PREFLIGHT CHECK.
Check the operation and direction
of the elevator, rudder, ailerons and
throttle.
A) Plug in your radio system per the
manufacturer’s instructions and turn
everything on.
B) Check the elevator rst. Pull
back on the elevator stick. e elevator halves should move up. If it they do
not, ip the servo reversing switch on
your transmitter to change the direction.
C) Check the rudder. Looking from
behind the airplane, move the rudder
stick to the right. e rudder should
move to the right. If it does not, ip
the servo reversing switch on your
transmitter to change the direction.
D) Check the throttle. Moving the
throttle stick forward should open the
carburetor barrel. If it does not, ip the
servo reversing switch on your transmitter to change the direction.
E) From behind the airplane, look
at the aileron on the right wing half.
Move the aileron stick to the right.
e right aileron should move up and
the other aileron should move down.
If it does not, ip the servo reversing
switch on your transmitter to change
the direction.
1) Completely charge your transmitter and receiver batteries before
your rst day of ying.
2) Check every bolt and every glue
joint in the CLASSIC UGLY STICK
to ensure that everything is tight and
well bonded.
3) Double check the balance of the
airplane. Do this with the fuel tank
empty.
4) Check the control surfaces. All
should move in the correct direction
and not bind in any way.
5) If your radio transmitter is
equipped with dual rate switches
double check that they are on the low
rate setting for your rst few ights.
6) Check to ensure the control surfaces are moving the proper amount
for both low and high rate settings.
7) Check the receiver antenna.
It should be fully extended and not
coiled up inside the fuselage.
We wish you many safe and enjoyable ights
with your CLASSIC UGLY STICK.
8) Properly balance the propeller.
An out of balance propeller will cause
excessive vibration which could lead
to engine and/or airframe failure.
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