Seagull Models BOOMERANG EP Manuel utilisateur

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ASSEMBLY MANUAL

MS: 211

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BOOMERANG EP

ARF TRAINER KIT

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

Specications:

Wingspan---------------56.0 in (142.2 cm).

Wing area----------------263.5sq.in (17.0 sq.dm).

Weight-------------------4.4 - 4.8 lbs (2.0 - 2.2 kg).

Length-------------------41.2 in (104.7cm).

Electric Power 32..............................................

Speed control 50A............................................

(APC) 11x6 EP..................................................

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

Flying skill level intermediate/ advanced

ALMOST

READY TO FLY

BOOMERANG EP Instruction Manual.

ank you for choosing the BOOMERANG EP ARTF by SEAGULL MODELS COMPANY

LTD,. e 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 onventionally built using bal-

sa, 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 BOOMERANG EP is simply a joy.

is instruction manual is designed to help you build a great ying earoplane. Please read

this manual throughly before starting assembly of your BOOMERANG EP. User the parts

listing below to indentify all parts.

Please be awere that this aeroplane is not a toy and if assembley 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 inexperianced 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.

ADDITIONAL ITEMS REQUIRED.

TOOLS AND SUPPLIES.

• .40-.46 2-stroke engine.

• 4 channels radio with four servos.

• Glow plug to suit engine.

• Propeller to suit engine.

• Protective foam rubber for radio system.

• Silicone fuel line.

• Stick-on weights for balance

• ick 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.

KIT CONTAIN.

FUSELAGE ASSEMBLY

- (1) Fuselage.

- (1) Pre-installed throttle pushrod & tube.

- (1) Pre-installed servo tray.

- (1) Pre-installed motor mount.

- (1) Pre-installed rudder pushrod.

- (1) Pre-installed elevator pushrod.

WING ASSEMBLY

- (1) Right wing half with preinstalled aileron.

- (1) Le wing half with pre-installed aileron.

- (1) Aluminium wing tube.

- (1) Covering strip for centresection joint.

TAIL SECTION ASSEMBLY

- (1) Vertical stabilizer with preinstalled rudder.

- (1) Horizontal stabilizer with preinstalled el-

evator halves

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HINGING THE AILERON.

e control surfaces, including the ai-

lerons, elevators, and rudder, are pre-

hinged with hinges in stalled, but the

hinges are not glued in place. It is im-

perative that you properly adhere the

hinges in place per the steps that fol-

low using a high-quality thin C/A glue.

Note :

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 aileron

until the T-pin is snug against the aileron.

is 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.

3) Slide the aileron on the wing panel until

there is only a slight gap. e hinge is nowcen-

tered on the wing panel and aileron. Remove

theT-pinsandsnugtheaileronagainstthewing

panel. A gap of 1/64” or less should be main-

tained between the wing panel and aileron.

4) Deect 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 hing-

es are glued in place, a 1/64” gap or less will

be maintained throughout the lengh of the ai-

leron to the wing panel hinge line.

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.

Note :

Hinge

C/A glue

BOOMERANG EP Instruction Manual.

5) Turn the wing panel over and deect the

aileron in the opposite direction from the

opposite side. Apply thin C/A glue to each

hinge, making sure that the C/A pene-

trates into both the aileron and wing panel.

6) Using C/A remover/debonder and a pa-

per 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.

8) Aer 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 ap-

plying 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 sev-

eral times to “work in” the hinges

and check for proper movement.

Note :

HINGING THE RUDDER.

Glue the rudder hinges in place using the

same techniques used to hinge the ailerons.

WING ASSEMBLY.

See below pictures.

Aluminium wing tube

HINGING THE ELEVATOR.

Glue the elevator hinges in place using the

same techniques used to hinge the ailerons.

Epoxy.

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INSTALLING THE AILERON SERVO.

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 dier, 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 pick-

up works well) and thread, feed the string

through the wing as indicated.

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.

Electric wire.

Thread.

Plastic tape.

3) Attach servo lead to the aileron servo. At-

tach the string to the servo lead and care-

fully thread it though the wing. Once you

have thread the lead throught the wing, re-

move the string so it can use for the other

servo lead.

Repeat the procedure for the other wing

half.

BOOMERANG EP Instruction Manual.

INSTALLING THE LANDING GEAR.

1) e 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) Position the aileron horn on the bottom

side of aileron. e clevis attachment holes

should be positioned over the hinge line.

ControlHorn.

Mounting Screws. Mounting Plate.

4) Using a 1mm drill bit and the control

horns as a guide, drill the mounting holes

through the aileron halves.

5) Mount the control horns by inserting the

screws through the control horn bases and

aileron halves, then into the mounting back-

plates. Do not overtighten the screws or the

backplates may crush the wood.

6) read one nylon adjustable control horn

onto each aileron control rod. read the

horns on until they are ush with the ends of

the control rods.

8) Make a 90-degree bend at the mark and

cut o the excess wire leaving 10mm past the

bend.

9) Connect the linkage as shown and secure

the control wire with a wire keeper.

AILERON LINKAGE.

1) Using a ruler & pen to draw a straight line

as below picture.

2) Locate the two nylon control horns, two

nylon control horn backplates and four ma-

chine screws.

7) With the aileron servo centered and the

aileron even with the trailing edge of the

wing attach the clevis to the control horn.

Mark the control wire where it crosses the

servo arm hole.

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 vi-

brate loose.

2x15mm

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M4x20mm

NOSE GEAR INSTALLATION.

See below pictures.

Collar.

Thread locker glue.

INSTALLING THE FUSELAGE SERVOS.

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.

Pushrod wire.

Steering arm.

BOOMERANG EP Instruction Manual.

2) Secure the servos with the screws provid-

ed with your radio system.

Rudder servo.

Elevator servo.

Elevator servo arm.

Rudder servo arm.

ELECTRIC POWER CONVERSION.

1) Locate the items neccessary to install the

electric power conversion included with

your model.

M4x30mm

Tie wrap

Speed control

Battery

1) Install the rubber grommets and brass

collets onto the throttle servo. Test t the

servo into the aileron servo mount.

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COWLING

1) Slide the berglass cowl over the motor

and line up the back edge of the cowl with

the marks you made on the fuselage then

trim and cut as shown.

2) While keeping the back edge of the cowl

ush with the marks, align the front of the

cowl with the cranksha of the engine. e

front of the cowl should be positioned so the

cranksha is in nearly the middle of the cowl

opening. Use the spinner backplate as a

guide. Hold the cowl rmly in place using

pieces of masking tape.

3) Install the muer and muer extension

onto the engine and make the cutout in the

cowl for muer clearance. Connect the fuel

and pressure lines to the carburetor, muer

and fuel ller valve. Secure the cowl to fuse-

lage using the M3x10mm screws.

3x10mm

BOOMERANG EP Instruction Manual.

INSTALLING THE SPINNER.

Install the spinner backplate, propeller and

spinner cone.

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.

HORIZONTAL STABILIZER.

1) Using a ruler and a pen, locate the center-

line of the horizontal stabilizer, at the trail-

ing 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.

4) With the stabilizer held rmly in place,

use a pen and draw lines onto the stabilizer

where it and the fuselage sides meet. Do this

on both the right and le sides and top and

bottom of the stabilizer.

5) Remove the stabilizer. Using the lines you

just drew as a guide, carefully remove the

covering from between them using a mod-

eling knife.

Remove the covering

Pen.

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