Seagull Models SEA385 User manual

ASSEMBLY MANUAL

Code : SEA385

Specications:

Wingspan------------------ 122 in------------------- 310 cm.

Wing area------------------ 2017.8 sq.in----------- 130.2 sq.dm.

Weight---------------------- 36.4 lbs---------------- 16.5 kg.

Length---------------------- 85 in-------------------- 215.8 cm.

Engine size---------------- 70 - 125cc gasoline engine.

Radio----------------------- 8 channels with 8 digital servos.

Instruction Manual.Giant Scale Cessna O-1 Bird Dog 122” ARF 70-125cc

ank you for choosing the Giant Scale Cessna O-1 Bird Dog 122” ARF 70-125cc

ARTF by SG MODELS . e Giant Scale Cessna O-1 Bird Dog 122” ARF 70-125cc

was designed with the intermediate/advanced sport yer in mind. It is a semi scale air-

plane 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 al-

lows 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 Giant Scale Cessna O-1 Bird Dog 122” ARF 70-125cc 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 Giant Scale Cessna O-1 Bird Dog

122” ARF 70-125cc 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 ca-

pable 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 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

SEA385 Giant Scale Cessna O-1 Bird

Dog 122” ARF 70-125cc

1. Fuselage

2. Wing set (2)

3. Tail set (3)

4. Canopy

5. Cowling

6. Wing tube

7. Landing gear

8. Tail wheel

9. Fuel tank

10. Led light set

11. Windows

14. Rockets (2)

ADDITIONAL ITEMS REQUIRED

TOOLS & SUPPLIES NEEDED

in cyanoacrylate glue.

Medium 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.

�70-125cc gasoline engine.

�Computer radio 8 channel with 8

servos.

�Glow plug to suit engine.

�Propeller to suit engine.

�Protective foam rubber for radio

system.

LED LIGHT SET

Please see pictures below.

One the green light for right wing tip,

two white light and the red light for le

wing tip. ey are designed to operate on

voltages 12 volts. Connect four lights into

switch circuit so that optional the dier-

ent ashes mode.

Instruction Manual.Giant Scale Cessna O-1 Bird Dog 122” ARF 70-125cc

Epoxy

10.

11.

Epoxy

12.

13.

14.

M2x6mm

15.

16.

17.

C/A glue

INSTALL THE AILERONS

Please see pictures below.

Instruction Manual.Giant Scale Cessna O-1 Bird Dog 122” ARF 70-125cc

Epoxy

Use a small piece of rough sandpaper to

scu the hinges for better epoxy adhesion.

Do this to all aileron hinges.

Remove the ailerons from the wing and

remove the hinges.

Apply epoxy to each hinge where it will

be inserted into the ailerons. Tip: Apply

some petroleum jelly to the metal pin

hinge area to keep epoxy from interfering

with smooth operation of hinge.

Insert all four hinges in the ailerons at

this time. Make sure hinges move up and

down in right direction and not side to

side !

Apply epoxy into each of the holes in the

ailerons using a spare piece of pushrod

wire or toothpick.

Make sure to use enough epoxy so it

securely adheres the hinge to the surfaces.

Do not use an excessive amount of epoxy

when gluing the hinges so that it expels

from the hinge area.

Be sure to test the aileron hinges once

you insert them. Ensure that the hinge

pockets line up, and that the hinges move

freely before the epoxy dries.

Epoxy

INSTALL THE AILERONS

CONTROL HORN

Fiberglass control horn

Epoxy

Ailerons control horn

Check the t of the aileron to the wing.

e top of the ailerons will align to the

top of the wing. Make sure movement is

smooth and bind free.

We prefer 30-minute epoxy to allow

enough working time during the hinge

installation.

Instruction Manual.Giant Scale Cessna O-1 Bird Dog 122” ARF 70-125cc

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.

INSTALLING THE AILERON SERVOS

Apply 2-3 drops of thin C/A to each of

the mounting holes. Allow the C/A to

cure without using accelerator.

Use drill bit in a pin vise to drill the

mouting holes in the blocks.

Apply 2-3 drops of thin C/A to each of

the mounting holes. Allow the C/A to

cure without using accelerator.

1.5mm

C/A glue

Minimum servo spec.

Torque : 27.3 kg-cm (378 oz-in) @6.0V

33.7 kg-cm (467 oz-in) @7.4V

38.2 kg-cm (530 oz-in) @8.4V

Transit Speed : 0.14 sec/60 @6.0V

0.11 sec/60 @7.4V

0.10 sec/60 @8.4V

40mm

Use dental oss or heatshrunk tube to

secure the connection so they cannot be-

come unplugged.

Secure the servo to the aileron hatch us-

ing Phillips screwdriver and the screws

provided with the servo.

Apply 1-2 drops of thin C/A to each of

the mounting tabs. Allow the C/A to cure

without using accelerator.

C/A glue

Use dental oss or heat shrink tubing

to secure the connection between the

servo and extension wire so they cannot

become unplugged accidentally.

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.

10.

11.

12.

Set the aileron hatch in place and use a

Phillips screw driver to install it with four

wood screws.

M3x10mm

13.

Instruction Manual.Giant Scale Cessna O-1 Bird Dog 122” ARF 70-125cc

3.3.

120mm

AILERON PUSHROD INSTALLATION

Please see below pictures.

INSTALLING THE FLAP PUSHROD

14.4.

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