Seagull Models EXTRA EA 300L Manual de usuario

Specifications:

Wing span ------------------------------54.9 in ( 139.5cm).

Wing area -----------------517.7 sq.in ( 33.4sq dm).

Weight ------------------------6.6 lbs ( 3.0 kg).

Length ------------------------------44.4 in ( 112.9 cm).

Engine ------------------ 0.46 cu.in -----2-stroke.

0.62 cu.in -----4-stroke.

Radio ------------------- 4 channels with 5 servos.

Electric conversion: optional

MS:199

“Graphics and specifications may change without notice”.

ASSEMBLY MANUAL

SIZE: 46-62

EXTRA EA 300l - 1395mm.Instruction Manual.

INTRODUCTION.

Thank you for choosing the EXTRA EA300L by SEAGULL MODELS. The EXTRA EA300L was

designed with the intermediate/advanced sport flyer in mind. It is a semi scale airplane which is easy

to fly and quick to assemble. The 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 find

that most of the work has been done for you already.The motor mount has been fitted and the hinges

are pre-installed . Flying the EXTRA EA300L is simply a joy.

This instruction manual is designed to help you build a great flying aeroplane. Please read this

manual thoroughly before starting assembly of your EXTRA EA300L. Use the parts listing below to

identify all parts.

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 & RESPONSIBILITY.

If you are inexperienced with basic R/C flight we strongly recommend you contact your R/C supplier

and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training

procedures designed to help the new pilot on his way to successful R/C flight. They will also be able

to advise on any insurance and safety regulations that may apply.

KIT CONTENTS

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ADDITIONAL ITEMS REQUIRED.

0.46 2-stroke.

0.62 4-stroke.

Computer radio with 5 servos.

Glow plug to suit engine.

Propeller to suit engine.

Protective foam rubber for radio

system.

Silicone fuel line.

TOOLS & SUPPLIES NEEDED.

Thick 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.

Thread-lock.

Paper towels.

The control surfaces, including the

ailerons, 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.

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. This

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.

HINGING THE AILERONS .

Note:

Hinge.

T-pin.

KIT CONTENTS.

1 Fuselage

2 Wing set

3 Tail set

4 Canopy

5 Pilot

6 Cowling

7 Main landing gear

8 Wheel pants

3) Slide the aileron on the wing panel until

there is only a slight gap. The 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.

1) Carefully remove the aileron from one

of the wing panels. Note the position of the

hinges.

EXTRA EA 300l - 1395mm.Instruction Manual.

8) After both ailerons are securely hinged,

firmly 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.

7) Repeat this process with the other wing

panel, securely hinging the aileron in place.

Work the aileron up and down several

times to “work in” the hinges and

check for proper movement.

Note:

HINGING THE ELEVATOR.

Glue the elevator hinges in place using the

same techniques used to hinge the ailerons.

4)Deflect the aileron and completely

saturate each hinge with thin C/A glue. The

ailerons front surface should lightly contact the

wing during this procedure. Ideally, when the

The 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.

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.

Note:

Hinge.

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.

5) Turn the wing panel over and deflect 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.

Epoxy

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HINGING THE RUDDER.

Glue the rudder hinges in place using the

same techniques used to hinge the ailerons.

Hinge.

LEDLIGHT

INSTALL THE AILERONS CONTROL

HORN.

Locate the hardware necessary to install the

control horns for the ailerons.

Aileron Control Horn

Assembling the ledlight as shown below

pictures. C/A glue

EXTRA EA 300l - 1395mm.Instruction Manual.

Epoxy

INSTALL ELEVATOR CONTROL

HORN.

Install the elevator control horn using the same

method as same as the aileron control horns,

Epoxy

Elevator Control Horn

INSTALL THE RUDDER CONTROL

HORN.

Repeat steps to install the rudder control horn

as same as steps done for ailerons.

Epoxy

Rudder control horn

Elevator

Epoxy

Rudder Control Horn

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ENGINE MOUNT INSTALLATION.

1) Locate the items necessary to install the

engine mount included with your model. .

2) Use four M4x30mm head bolts and four

4mm washers to attach the engine mount rails

to the firewall. Tighten the screws . Make sure

to use threadlock on the screws to help

prevent them from vibrating loose.

M4x30mm.

ENGINE 0.72 : 4 STROKE

1) Using a modeling knife, carefully cut

off the rear portion of one of the 3 nylon tubes

leaving 1/2” protruding from the rear of the

stopper. This will be the fuel pick up tube.

INSTALLING THE STOPPER ASSEMBLY.

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.

Thread locker glue

3) Carefully bend the second nylon tube

up at a 45º angle. This tube is the vent tube.

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. The top of the vent tube should rest just

below the top of the tank. It should not touch

the top of the tank.

4) Test fit the stopper assembly into the

tank. It may be necessary to remove some of

the flashing around the tank opening using a

modeling knife. If flashing is present, make

sure none falls into the tank.

Vent tube. Fuel pick up tube.

Fuel fill tube.

EXTRA EA 300l - 1395mm.Instruction Manual.

 7) Slide the fuel tank into the fuselage. Guide

the lines from the tank through the hole in the

firewall.

 8) Use balsa plywood to help prevent

moveable from transferring to the fuel tank as

shown.

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 difficult to determine which is which.

6) When satisfied with the alignment of

the stopper assembly tighten the 3 x 20mm

machine screw until the rubber stopper ex-

pands and seals the tank opening. Do not

overtighten the assembly as this could cause

the tank to split.

FUEL TANK INSTALLATION.

Fuel Tank

Rubber

C/A glue A

Vent tube.

Fuel pick up

Fuel fill tube.

INSTALLING THE BATTERY.

Battery.

INSTALLING THE MAIN LANDING GEAR

TO FUSELAGE.

Battery

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 1) The 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.

 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.

C/A glue.

Cut.

2) Follow diagram below for wheel pant

installation:

Use a drill and 8mm drill bit to drill a hole in the

wheel pants.

14mm.

8mm.

Drill a hole.

Thread locker glue.

M4x20mm

C/A glue.

M4x20mm.

WHEEL AND WHEEL PANTS

1) Locate the items neccessary to install

EXTRA EA 300l - 1395mm.Instruction Manual.

4) Slide the collar to the axle and setscrew

the collars to secure the collar to the axle and

then slider the wheel on the axle with a drop of

oil on the axle so the wheel will spin freely when

installed. Prepare a second collar and tighten

the setscrew using hex wrench to secure the

collar to the axle.

5) Place the wheel assembly in the wheel

pants. The threaded portion of the axle will fit

the notch of the wheel pant as shown.

3) You have to trim each axle using a tool

cutting and cut-off wheel.

wheel Pant.

wheel.

M3.

wheel collar.

nut.

Axle.

Washer.

Lite-Plywood

block.

M3.

wheel collar.

wheel.

Axle.

Washer.

M3.

6) Slide the threaded end of the axle

through the hole in the bottom of the landing

gear leg. Use a washer and locknut to tighten

the axle to the landing gear. Make sure to use

threadlock on the nut so it won’t vibrate loose

in flight as shown.

 7) Tighten the setcrews using a hex

wrench to secure the collars on the axle over

the flat spot to retain the wheel as shown.

INSTALLING THE FUSELAGE SERVOS.

1) Install the rubber grommets and brass

collets onto the throttle servo. Test fit the servo

into the aileron servo mount.

 2) Secure the servos with the screws pro-

vided with your radio system.

Because the size of servos differ, you

may need to adjust the size of the precut open-

ing in the mount. The notch in the sides of the

mount allow the servo lead to pass through.

Repeat steps as above to attach remain-

ing wheel pants to the landing gear.

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