Seagull Models MASTER SCALE KIT EDITION CLASSIC UGLY STICK... User manual

1
ASSEMBLY MANUAL
Code : SEA 255K
Specications:
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.

Master Scale Kit Edition Classic Ugly Stick 70.9” Instruction Manual.
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ADDITIONAL ITEMS REQUIRED. TOOLS & SUPPLIES NEEDED.
ank you for choosing the Master Scale Kit Edition Classic Ugly Stick 70.9” Build
Up Kit by SG Models. e Master Scale Kit Edition Classic Ugly Stick 70.9” was de-
signed with the beginner to intermediate sport yer in mind. It is a trainer airplane which is
quick to construct and easy to y. e airframe is conventionally built using balsa, plywood
to make it strong, yet the design allows the aero plane to be kept light. You will nd that
most of the cutting out work has been done for you already. It comes complete with a motor
mount, hardware kit and hinges.
e Master Scale Kit Edition Classic Ugly Stick 70.9” is simply a joy to build and y.
• is instruction manual is designed to help you build a great ying aero plane.
• Please read this manual throughly before starting assembly of your Master Scale Kit
Edition Classic Ugly Stick 70.9”.
• Use the component pictures on page 4 to indentify all parts before you start assembly.
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 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.
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.
INTRODUCTION.
WARNING.
• 10cc-15cc gasoline engine.
• .60 - .91 glow engine.
• 1200-1500 Watt Brushless Motor.
• Computer radio 4 channels with 5 servos.
• Glow plug to suit engine.
• Propeller to suit engine.
• Protective foam rubber for radio system.
• ick cyanoacrylate glue.
• 30 minute epoxy.
• 5 minute epoxy.
• Hand or electric drill.
• Assorted drill bits.
• Modeling 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.
• Hobby heat iron for covering

3
KIT CONTENTS.
- Die cut Partern for all Kit.

Master Scale Kit Edition Classic Ugly Stick 70.9” Instruction Manual.
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5

Master Scale Kit Edition Classic Ugly Stick 70.9” Instruction Manual.
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7

Master Scale Kit Edition Classic Ugly Stick 70.9” Instruction Manual.
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- Special part for Wing and Tail.
- Balsa stick for stabilizer, Rudder and
Fin.
- Balsa stick for trailing edge of wing.
• 8 x 10 x 700mm balsa (4 per kit)
• 8 x 12 x 160mm balsa (2 per kit)
• 3 x 8 x 180mm balsa (17 per kit)
• 12 x 8 x 810mm balsa (2 per kit)
• Balsa Block- Center Section Trailing
Edge ( 2 per kit)

9
- Hardware Pack.
- Documentaion.
• Includes hinges, horns, screws, fuel tank, landing gear wire, straps, wheels, wheel collars,
spinner, glue, sanding block, aluminum wing tube, pushrod and nylon pushrod tubing.
• 8mm dia. x 20mm Dowels for wing joiner .
• Plan Sheet
• Instruction book
• Set yourself up a building table or bench with a at surface big enough to assemble the
wing and fuselage. Preferably a table or bench with a wood surface that you can stick build-
ing pins into.
NOTE: Check with your parents or partner that it is ok FIRST!
• Lay out the included plans on the work table and secure it to the work table with pins or
tape.
• If you want to keep the plans clean for future use, you can cover them with plastic cling
wrap or a sheet of clear plastic before you get started.
• Identify the components required for each step using the plans and component pictures
on kit content.
• Take your time and test t components before gluing.
• Place over plans to help with alignment and pin in place where possible.
• Make sure the components are held in the correct position prior to adding glue.
NOTE: is is particularly important when using fast acting glues like CA (Cyano
Acrylate).
• Allow the glue to set completely before moving assembled components.
• Once you get familiar with the process and to get the strongest airframe, you may want to
tack.
the components together with CA rst (and uses accelerator for an instant set), the go back
over the joins with white wood glue and make a gusset of glue. (is kit includes a comple-
mentary bottle of white wood glue).
• Do not apply too much white glue, just a thin lm is enough.
• Build it light to y well - Don’t build it heavy, thinking it will survive a crash.
• When sanding balsa, use a light touch as balsa is a strong but very light timber and it
would be very easy to sand too much away.
• Be very careful when handling sharp hobby knives and blades, you do not want to cut
yourself.
• If you get glue on your hands, make sure you clean it o immediately, for your own safety
and to prevent glue getting onto surfaces that it shouldn’t.
• Tackle the build in small steps, completing each one before moving onto the next. In no
time at all the build will be complete and you will be able to show it o to your friends.
• If you are unsure how to proceed at any stage, stop and reread the instructions or seek help
from an experienced modeler or from your local hobby shop.
Good luck with your build and aer reading the rest of the instructions, you are
ready to start.
TIPS FOR GETTING STARTED.

Master Scale Kit Edition Classic Ugly Stick 70.9” Instruction Manual.
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- is section shows you how to construct one half of the wing. Repeat the instructions for
the other half.
WING PANEL CONSTRUCTION.
5.
2.
3.
4.
1.
WLE
WG
WSP
W9
W1 W2
Trailing edge
W3 W3 W4 W5 W6 W7 W7 W8 WTAIL
WT1
2 Layers
2 Layers
WT2

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- Locate plywood Main Wing Spars WG
and ribs W1 ~W10.
- Slide the ribs into their corresponding
positions.
- Rotate each wing rib so they are sitting
upright, perpendicular to the building
board.
- Use C/A glue to secure airfoil W1~ W10.
6.
- Locate and use C/A glue to secure Lead-
ing edge WLE, Trailing edge (special
balsa – 810mm long).
8.
7.
- Use white glue for Main Wing Spars
(WG ) as shown. Locate plywood string
(WSP )to Main Wing Spars at the both of
wing side.
9.
- Locate and use white glue to apply W9
to W1.
11.
10.
Secure Trailing edge
Secure leading edge

Master Scale Kit Edition Classic Ugly Stick 70.9” Instruction Manual.
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- Locate and use CA glue to assembly
wing tip.
12.
14.
17.
- Locate and use CA glue to assembly the
airfoil ( AIL ) to wing tip as shown. - Carefully block sand plywood string,
airfoil as shown.
- Locate and use white glue to apply
the balsa block stick to leading edge as
shown.
- Locate and use CA glue to assemble the
wing tube lock ( WL ) to leading edge as
shown.
- Use a building square and a number of
clamps to hold the wing structure while
you spot glue it with CA to secure the
sheet WSH1 ( one top side of wing).
13.
15.
16.
e building square

13
18.
NOTE: Make sure each join is posi-
tioned correctly before you apply a drop
of CA. CA dries very quickly when two
pieces of wood come together.
- Insert the carbon tube into wing panel
from W1 to W4. Tack glue in place with
CA glue, then apply white glue liberally
to each join.
- Use CA glue to secure the wing tube to
the lock ( WL ) and the airfoils. And then
cut the carbon tube ush with the outside
of W1.
- Use the white glue to secure wing tube.
19.
20.
21.
- Locate and use CA glue to secure the
servo mount to the airfoils as shown.
- e wing sheets.
22.
23.

Master Scale Kit Edition Classic Ugly Stick 70.9” Instruction Manual.
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- Use the white glue at the edge of air-
foil, leading edge for applying the sheet
WSH1 and then tted to the top of the
wing panel using the same method as
in repeat for the WSH2 (bottom side of
wing ). Your wing panel should now look
like picture.
- Use white glue at airfoil edge ( W1 ~
W3) to apply the sheet WSH5 ( bottom
wing sheet ) as shown. And then Insert
Balsa Block - Center Section Trailing
Edge- to Trailing edge for the mount of
bolt.
- e wing sheet of trailing edge.
- Locate the trailing edge sheeting. Use
white glue to secure the trailing edge
sheeting WSH8 (x2) at both sides.
25.
26.
27.
28.
29.
24.
WSH8
WSH8
WSH6 WSH7
WSH5
Center section trailing edge

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30.
31.
- Use white glue at airfoil edge ( W1 ~
W3) to apply the sheet WSH4 (top wing
sheet); W4 ~ W6 to apply the sheet
WSH6 ( bottom wing sheet ); W7 ~ W8
to apply the sheet WSH7 ( top+bottom
wing sheet ) as shown. And then apply
the sheet WSH3 ( top wing sheet ).
NOTE: Try not to sand into wing or
round o the end ribs. Keep it square!.
- Carefully saw o any overhang ma-
terial, then block sand the root ends of
the spars, leading edge, and trailing edge
ush with the pre-angled wing rib. Use
a large sanding block and sand slowly to
keep the end of the wing panel straight
and true.
32.
33.
- Locate and use white glue to apply wing
root W1 as shown.
34.
35.
WSH5
WSH4
WSH6 WSH7
Use sanding block to make
everything ush with W1

Master Scale Kit Edition Classic Ugly Stick 70.9” Instruction Manual.
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36.
40.
38.
41.
37.
39.
Test t alloy wing tube. Insert
one half in one wing panel
e aileron special
balsa part (AIL)
- Glue dowel in place with white glue and
wait for it to dry .
- Making the slots for the hinges on the
trailing edge of wing by sawing machine
or handmade. Locate the aileron special
balsa part (AIL), and check that all the
slots have been cut. Check that all the
slots have also been cut in the wing panel.
- Slide the other wing panel onto the tube
and push the two halves together.
NOTE: DO NOT GLUE AT THIS
STAGE
- Finish for the right wing and le wing.
Finish for the right wing and le wing.
- Test t alloy wing tube. Insert one half
in one wing panel.
NOTE: DO NOT GLUE AT THIS
STAGE.

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42.
Preparing fuselage component as shown
S3
S1
S2
F2
M3
(3layers)
M5
(3layers)
M4
(3layers)
F1
(3layers)
3layers
Motor (MO)
- Test t the hinges by inserting a a sin-
gle easy hinge halfwway into each slot in
the trailing edge of the wing. Place a pin
through the hinge to prevent the hinge
sliding into the wing.
- Your wing panel should now look like
picture above.
43.
44.
- Gently sand the entire trailing edge
straight using sanding block.
1.
FUSELAGE CONTRUCTION.

Master Scale Kit Edition Classic Ugly Stick 70.9” Instruction Manual.
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3.
2.
4.
5.
6.
- Locate and assemble fuselage front S1
and fuselage rear S1B, join them by S3.
Repeat for the other fuselage side using
S2 front and S2B rear. Lay at on plastic
surface an apply CA glue. Wipe o any
excess glue before it dries so that there
won’t be a glue lump at the joint.
-Locate and assemble the fuselage side
doublers S1A and from nose to wing seat,
use white glue to secure. Repeat S2A for
the other fuselage side. Allow glue to set
before proceeding. Make sure you have
assembled them as shown so that you
end up with both a le and right fuselage
side.
- Locate and assemble 3 layer for motor
mount ( MO); 3 layer for engine mount (
F1) and 2 layer for ring (ER)
- Locate and assemble 2 layer for F2 and
F2A
- Locate and assemble 4 layer for land-
ing gear M4A( 1pcs), M4B(2pcs) ,
M4C(1pcs); 3 layer for landing gear
M5A( 1pcs), M5B(2pcs) ; 3 layer for wing
mount M3A( 1pcs), M3B(2pcs).
- Locate and assemble F2(F2A) dou-
blers and battery/ fuel tank mount M1 as
picture
- Locate and assemble F2 doublers,
mount M1 and landing gear mount M4
(4 layers) to fuselage side as shown.

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7.
8.
9.
10.
11.
12.
- Locate and assemble landing gear
mount M5 ( 3 layers) to fuselage side as
shown.
- Locate and assemble wing mount MA3
( 3 layers) to fuselage side as shown.
- Locate and assemble wing mount MA3
( 3 layers) to fuselage side as shown.
- Locate and assemble F10 to M7, M8 (
2pcs) as shown.
- Locate and assemble servo mount M2
and F5 to fuselage side as shown.

Master Scale Kit Edition Classic Ugly Stick 70.9” Instruction Manual.
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13.
14.
15.
- Use C/A glue to secure formers F6~F9.
- Use 30min epoxy to glue F2(2pcs), F3, F4, F5, M1, M2, M3(3pcs), M4(4pcs), M5(3pcs),
F10, M7 in place.
- Work quickly apply white glue to the tops of F6~F9 and 30min epoxy to F2(2pcs), F3, F4,
F5, M1, M2, M3(3pcs), M4(4pcs), M5(3pcs), F10, M7.
- Place the other fuselage side in place and hold in place with rubber bands or masking tape
wrapped around the fuselage in several places. Make sure the fuselage is straight down the
centre line. (Use the plan, make sure F2, F5 and wing mount M3 are square to the fuselage
sides).
F2
F2 F5M3
F3 F4 F5 F6 F7 F8 F9 F10