Seagull Models SEA274 User manual

ASSEMBLY MANUAL

Specications:

Wingspan---------------82.0 in (208.2 cm).

Wing area---------------1349.4 sq.in ( 87.1 sq.dm).

Weight-------------------16.3 -16.8 lbs (7.4- 7.6kg).

Length-------------------77.7 in (197.3 cm).

Engine-------------------50cc-55cc gasoline.

Radio--------------------6 channels with 6 servos.

“ Graphics and specications may change without notice ” .

Code: SEA274

EXTRA 330LX

EXTRA 330LX Instruction Manual.

ank you for choosing the EXTRA 330LX ARF by SG MODELS . e EXTRA 330LX

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 conventionally built using balsa,

plywood to make it stronger than the average ARF, 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 EXTRA 330LX 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 EXTRA 330LX . Use the parts listing

below to indentify all parts.

ADDITIONAL ITEMS REQUIRED. TOOLS & SUPPLIES NEEDED.

INTRODUCTION.

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 & 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.

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.

�50cc-55cc gasoline engine.

�Computer radio with 6 servos.

�Glow plug to suit engine.

�Propeller to suit engine.

�Protective foam rubber for radio

system.

EXTRA 330LX Instruction Manual.

INSTALL THE AILERONS

CONTROL HORN.

Epoxy.

Aileron control horn.

INSTALLING THE AILERON SERVOS.

1) e ailerons have been pre-hinged

and glued to the wing panels and are

ready for ight. No other steps are neces-

sary for hinging.

2) Layout the servo on the wing to test t

the installation and ensure servo lead is

the correct length.

3) Attach the extension to the servo lead

and secure with Safety Clip, safety wire,

tape or other method. Ensure the plugs

will not come apart from vibration or

light tension.

4) Fasten the pull string from the servo

hole to the male plug of the servo exten-

sion.

Fiberglass control horn

NOTE : servos arm for aileron is not pro-

vided from manufacturer.

5) Install servo in servo well with the out-

put arm toward the leading edge of the

wing. Mark and drill location of servo

mounting holes.

6) Install servo with servo mounting

screws.

in CA.

38mm

INSTALLING THE AILERON

PUSHROD.

M3x15 Socket Head Cap Screw.

Flat washer.

Lock nut.

M3x15 Socket Head Cap Screw.

Lock nut.

Flat washer.

EXTRA 330LX Instruction Manual.

ELEVATOR SERVO INSTALLATION.

1) e elevators have been pre-hinged

and glued to the stabs and are ready for

ight. No other steps are necessary for

hinging.

INSTALL ELEVATOR CONTROL HORN.

Elevator berglass control horn.

Epoxy.

Fiberglass control horn

2) Attach the extension to the servo lead

and secure with Safety Clip, safety wire,

tape or other method. Ensure the plugs

will not come apart from vibration or

light tension.

Repeat all the above steps for the other

wing.

100mm

NOTE : servos arm for elevator is not pro-

vided from manufacturer.

3) Feed servo extension through the el-

evator servo mounting hole.

4) Mark and drill location of servo

mounting holes.

in CA.

38mm

5) Install servo with servo mounting

screws.

ELEVATOR PUSHROD INSTALLATION.

M3x15 Socket Head Cap Screw.

Flat washer.

Lock nut.

EXTRA 330LX Instruction Manual.

INSTALL RUDDER CONTROL HORN.

Repeat all the above steps for the other

elevator.

M3x15 Socket Head Cap Screw.

Lock nut.

Flat washer.

Fiberglass control horn

38mm

Epoxy.

Use scotch tape to avoid

pushrod drop out.

1) Gather one rudder ervo, mounting

screws, servo arm and the rudder control

linkage parts shown below.

INSTALL RUDDER CABLE AND SERVO.

38mm

2) Tape the rudder balance tab to the top

leading edge of the vertical n in the neu-

tral position as shown. is ensures the

rudder is straight when the cables are at-

tached.

3) read the rudder cable through a

brass swage tube, then the threaded cou-

pler, and back through the brass swage

tube on both sides. Pull light tension on

the cable through the coupler on both

sides as shown.

M3x15 Socket Head Cap Screw.

Lock nut.

Flat washer.

5) Crimp the brass tube with a crimping

tool or pliers.

4) Loop the cable back through the brass

swage tube and tighten the second loop

through the brass swage tube as shown.

NOTE : servos arm is not provided from

manufacturer.

EXTRA 330LX Instruction Manual.

11) Loop the cable back through the brass

swage tube and pull tight.

10) read cable through the threaded

coupler hole, and back through the brass

swage tube as shown.

6) Cut o excess cable as shown.

7) Mark and use a 1/16 bit to drill the

rudder servo.

9) read cable through brass swage tube.

8) Feed one rudder cable through the pre

installed cable exit tube in the rear of the

fuse toward the front of the fuse. Repeat

for other side.

in CA.

This manual suits for next models

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