Seagull Models SEAX139 User manual

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ASSEMBLY MANUAL

Code: SEAX139

www.seagullmodels.com

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

(SEAX139R)

(SEAX139W)

Specications:

Wingspan---------------50.4 in ( 128 cm).

Wing area---------------375 sq.in (24.2 sq.dm).

Weight-------------------2.8-3.1 lbs (1.25-1.4 kg).

Length-------------------33.8 in (85.8 cm).

Recommend engine size-------Motor 480

--------------------------------------Power 15 or Power 25

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

SHOESTRING 25e EP Instruction Manual.

ank you for choosing the SHOESTRING 25e EP ARTF by SEAGULL MODELS

COMPANY LTD,. e SHOESTRING 25e EP was designed with the intermediate/ad-

vanced sport yer in mind. It is a semi scale airplane which is easy to y and quick to as-

semble. e 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 nd

that most of the work has been done for you already. e motor mount has been t-

ted and the hinges are pre-installed. Flying the SHOESTRING 25e EP 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 SHOESTRING 25e EP . Use the

parts listing below to indentify all parts.

Please be awere 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.

INTRODUCTION.

WARNING.

KIT CONTENTS

6 7

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KIT CONTENTS.

SEAX139 SHOESTRING 25e EP

SEAX13901 Fuselage

SEAX13902 Wing set

SEAX13903 Tail set

SEAX13904 Cowling

SEAX13905 Wheel pants

SEAX13906 Aluminum tube

SEAX13907 Landing gear

ADDITIONAL ITEMS REQUIRED.

480 Motor size

Or Power 15 or Power 25

Computer radio with 4 servos.

Glow plug to suit engine.

Propeller to suit engine.

Protective foam rubber for radio

system.

TOOLS & SUPPLIES NEEDED.

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.

HINGING THE AILERON.

Note : e control surfaces, including the ai-

lerons, elevators, and rudder, are prehinged

with hinges installed, but the hinges are not

glued in place. It is imperative that you prop-

erly adhere the hinges in place per the steps

that follow using a high-quality thin C/A glue.

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 wing

panel until the T-pin is snug against the wing

panel. is will help ensure an equal amount

of hinge is on either side of the hinge line

when the aileron is mounted to the aileron.

3) Slide the wing panel on the aileron until

there is only a slight gap. e hinge is now

centered on the wing panel and aileron. Re-

move 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.

Hinge.

SHOESTRING 25e EP Instruction Manual.

4) Deect the aileron and completely satu-

rate each hinge with thin C/A glue. e ailer-

ons front surface should lightly contact the

wing during this procedure. Ideally, when

the 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 : e hinge is constructed of a spe-

cial 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.

C/A glue.

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.

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 penetrates

into both the aileron and wing panel.

1) Remove the servo cover from the wing.

Do not let the string fall into the wing as it is

used to pull the servo lead through the wing.

2) Place the servo between the tabs on the

servo cover with the output of the servo over

the opening in the cover. With the servo

spaced slightly o the cover, use a pencil to

mark the location for the servo mounting

screws.

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.

Work the aileron up and down sev-

eral times to “work in” the hinges

and check for proper movement.

Note :

INSTALLING THE AILERON SERVOS.

7) Repeat this process with the other wing

panel, securely hinging the aileron in place.

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3) Use a drill bit to drill the holes for the ser-

vo mounting screws.

4) Use a screwdriver to thread a servo

mounting screw into each of the holes to cut

threads in the surrounding wood. Remove

the screw before moving to the next step.

6)Secure the servo using the screws provided

with the servo and a screwdriver. e output

sha of the servo will align with the opening

in the cover.

7) Fit the servo horn to the servo so it is per-

pendicular to the servo.

8) Use string or dental oss to secure a servo

extension to the aileron servo lead.

5) Apply 2-3 drops of thin CA in each of the

holes to harden the surrounding wood. is

will harden the threads so the screws do not

easily strip the surrounding wood.

C/A glue.

9) Use the string to pull the extension

through the wing root.

1.5mm

SHOESTRING 25e EP Instruction Manual.

10) Apply 1-2 drops of thin CA in each

of the holes to harden the surrounding

wood for the aileroon cover screws.

12) Use a drill bit to drill the two holes

completely through the aileron for the ai-

leron control horn mounting screws. e

holes have already been started and are

easily found on the bottom of the aileron.

13) Attach the control horn to the aileron

using two 2x12m metal screws and a con-

trol horn backplate. Use a screwdriver to

tighten the screws.

11) Set the aileron hatch in place and use

screwdriver to install it with four metal

screws.

2x12mm

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M2 clevis. Hex nut.

Fuel tubing.

Repeat steps to install the remaining ai-

leron control horn and pushrod.

1) e blind nuts for securing the land-

ing gear are already mounted inside the

fuselage.

4) Use hobby scissors and a hobby knife

to trim the landing gear fairings. Leave

the size of the fairings slightly over-sized.

2) Using the hardware provided, mount

the main landing gear to the fuselage.

3) Place the fuselage inverted on the

workbench in a suitable stand. Set the

landing gear in place and use a screw-

drive to secure the landing gear to the fu-

selage using bolts M4x15mm and wash-

ers. Make sure to use the threadlock on

the bolts so they don’t vibrate loose.

INSTALLING THE MAIN LANDING

GEAR TO FUSELAGE.

M4x15mm

read locker glue.

C/A glue.

M4x15mm

SHOESTRING 25e EP Instruction Manual.

WHEELS AND WHEEL PANTS.

6) Fit the landing gear fairings over the

gear. Slowly trim the fairing to t to the

fuselage. When installed, they will cover

the area where the landing gear attaches

to the fuslage.

1) Remove the hardware from the axle.

Place a drop of light machine oil on the

axle to help the wheel roll freely.

2) Slide the axle into the wheel.

3) Slide the wheel into the wheel pant.

C/A glue.

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4) Repeat above steps to install the re-

maining wheel and wheel pant on the

landing gear.

ELECTRIC POWER CONVERSION.

Please see below pictures.

1) Route the leads for the motor through

the hole in the rewall.

2) Loop a tie-wrap ( not included)

through the plate in the fuselage right

above the landing gear plate. Make sure

the tie-wrap is not looped through the

battery mounting plate.

3x20mm

SHOESTRING 25e EP Instruction Manual.

3) Slide the speed control into the fuse-

lage with the battery wires, receiver lead

and switch going in and through the tie-

wrap. Position the speeed control, then

tighten the tie-wrap to secure the speed

control in the fuselage. e heat sink will

face the top of the fuselage.

4) Connect the wires from the motor to

the wires of the speed control. Use a tie-

wrap ( not included) to secure the leads

so they don’t interfere with the operation

of the motor or installation of the cowl-

ing.

5) Route the battery lead through the

opening in the fuselage. e lead for the

receiver is routed under the battery tray

and receiver, then plugged into the throt-

tle channel of the receiver. Mount the

switch from the speed control in the fu-

selage where it can be accessed when the

canopy is removed.

6) Secure the battery in the fuselageusing

a hook and loop strap. Also, place hook

and loop tape on the battery and fuselage

where they contact each other to prevent

the battery from moving.

Receiver.

Battery.

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