Seagull Models Shoestring SEA143 User manual

“Graphics and specifications may change without notice”.

ASSEMBLY MANUAL

MS: 143

Specifications:

Wingspan-----------------------------63in(160cm).

Wingarea---------------722.3sq.in(46.6sqdm).

Weight----------------------8.8-9.7lbs(4.0-4.4kg).

Length-----------------------------54.5in(138.5cm).

Engine -------------0.61-0.75cu.in-----2-stroke.

0.91-1.25cu.in -----4-stroke.

Radio----------4channelswith5digitalservos.

Electricconversion:optional.

SHOETRING. Instruction Manual

INTRODUCTION.

Thank you for choosing the SHOETRING ARTF by SEAGULL MODELS COMPANY LTD. The

SHOETRING was designed with the intermediate/advanced sport scale in mind. It is a semi scale

airplane whichiseasytoflyandquick toassemble.Theairframeisconventionallybuiltusingbalsa,

plywood tomakeitstrongerthantheaverageARTF,yetthedesignallowstheaeroplanetobekept

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 SHOETRING 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 SHOETRING. 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

supplierandjoinyourlocalR/CModelFlyingClub.R/CModelFlyingClubsofferavarietyoftraining

proceduresdesigned tohelpthenewpilot onhisway tosuccessfulR/Cflight.They willalsobeable

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

KIT CONTENTS

513

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ADDITIONAL ITEMS REQUIRED.

0.61-0.75 cu.in 2-stroke

0.91-1.25 cu.in 4-stroke

Radio System required 4 channels

with 5 digital 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

Modellingknife

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

KIT CONTENTS

SEA14301 Fuselage

SEA14302 Wing set

SEA14303 Tail set

SEA14304 Fiberglass cowl

SEA14305 Landing gear

SEA14306 Canopy

SEA14307 Pilot

SEA14308 Fiberglass whl pants

SEA14309 Wheel

SEA14310 Aluminum wing tube

SEA14311 Engine mount

SEA14312 Fuel tank

SEA14313 Spinner

SEA14314 EP conversion pack

SEA14315 Hardware bag

2)Removeeach hinge fromthewing 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. This will help ensure an equal amount

ofhingeis oneithersideof thehingelinewhen

the aileron is mounted to the aileron.

The control surfaces, including the

ailerons, elevators, and rudder, are

prehinged with hinges installed, but the

hinges are not glued in place. It is

imperativethatyouproperlyadherethe

hingesinplaceperthestepsthatfollow

using a high-quality thin C/A glue.

Note:

HINGING THE AILERONS.

Hinge.

3) Slide the wing panel on the aileron 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.Agap of 1/64” or less

shouldbemaintainedbetweenthe wing panel

andaileron.

1) Carefully remove the aileron from one

of the wing panels. Note the position of the

hinges.

T-pin.

SHOETRING. Instruction Manual

HINGING THE ELEVATOR.

8)Afterboth 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.

Glue the elevator hinges in place using the

same techniques used to hinge the ailerons.

Work the aileron up and down several

times to “work in” the hinges and check

for proper movement.

Note:

4)Deflect the aileron and completely

saturate each hinge with thin C/A glue. The

aileronsfrontsurface shouldlightlycontactthe

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: The hinge is constructed of a special

material that allows the C/A to wick or

penetrateanddistribute throughoutthe

hinge, securely bonding it to the wood

structureofthewing panel and aileron.

5)Turn the wing paneloveranddeflectthe

aileron in the opposite direction from the

opposite side. Apply thin C/A glue to each

hinge,making surethattheC/Apenetratesinto

both the aileron and wing panel.

6) Using C/A remover/debonder and a

papertowel,removeany excess C/A gluethat

may have accumulated on the wing or in the

aileronhingearea.

Hinge.

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HINGING THE RUDDER.

Glue the rudder hinges in place using the

same techniques used to hinge the ailerons.

INSTALL AILERON CONTROL HORN.

Hinge.

INSTALL ELEVATOR CONTROL HORN.

Aileroncontrolhorn.

Epoxy.

Elevator control horn.

Epoxy.

INSTALL RUDDER CONTROL HORN.

Fiberglass control horn.

SHOETRING. Instruction Manual

1) Locate the items necessary to install the

engine mount included with your model. .

ENGINE MOUNT INSTALLATION.

4x30mm.

2) Usefour4x30mm head boltsandfour 4mm

washers to attach the engine mount rails to

thefirewall.Tighten thescrews. Make sure to

use threadlock on the screws to help prevent

them from vibrating loose.

3) Carefully bend the second nylon tube

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

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 STOPPERASSEMBLY.

Thread locker glue.

2) Usingamodelingknife,cutone length

ofsiliconfuelline. Connect one endoftheline

totheweightedfuelpickup and the other end

to the nylon pick up tube.(The silicon tube is

not included).

Ruddercontrolhorn.

Epoxy.

www.seagullmodels.com

Venttube. Fuel pick up tube.

Fuel fill tube.

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.

Important: When the stopper assembly is in-

stalled in the tank, the top of the vent tube

should rest just below the top surface of the

tank. It should not touch the top of the tank.

Carefully use a lighter or heat gun to

permenently set the angle of the vent tube.

5) With the stopper assembly in place,

the weighted pick-up should rest away from

therear 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.

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.

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.

 7) Slide the fuel tank into the fuselage.

Guide the lines from the tank through the hole

in the firewall.

Fueltank.

C/Aglue.

 8) Use balsa stick to help prevent moveable

from transferring to the fuel tank.

Fuel pick-up tube. Fuelfilltube.

Venttube.

 9) Connect the lines from the tank to the

engine and muffler. The vent line will connect

to the muffler and the line from the clunk to the

carburetor.

M4x15mm.

SHOETRING. Instruction Manual

1) Locate the items neccessary to install

thewheelandwheelpants to the landing gear

as shown.

WHEEL AND WHEEL PANTS

INSTALLATION.

2) Follow diagram below for wheel pant

installation:

Use a drill and 4.2mm drill bit to drill a hole in

the wheel pants.

8mm.

14mm.

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

cutting and cut-off wheel.

Caution when cutting the axles and

wear protective goggles.

wheel collar.

wheel.

Axle.

Washer. M3.

wheel Pant.

wheel.

M3.

wheel collar.

nut. Axle.

Washer.

M3.

Drill a hole.

4) Slidethecollar to theaxleandsetscrew

the collars to secure the collar to the axle and

thensliderthewheel on the axle withadropof

oilontheaxle sothe wheelwillspinfreelywhen

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.

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.

Pushrodwire.

Blow through one of the lines to ensure

thefuellines have not become kinked in-

side the fuel tank compartment. Air should

flowthrougheasily.

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C/Aglue.

LandingGear. wheel Pant. INSTALLING THE MAIN LANDING GEAR

TO FUSELAGE.

Lockerglue.

 8) The blind nuts for securing the landing

geararealreadymounted inside the fuselage.

 9) Using the hardware provided, mount

the main landing gear to the fuselage.

 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.

Repeat steps as above to attach remain-

ing wheel pants to the landing gear.

 10) Place the fuselage inverted on the

workbenchinasuitable stand. Set thelanding

gear in place and use a screwdrive to secure

the landing gear to the fuselage using bolts

M4x20mmandwashers. Make suretouse the

threadlock on the bolts so they don’t vibrate

loose.

Lockerglue.

M4 x 20mm.

Servos. Smallweight.

Thread.

INSTALLING THEAILERON.

SHOETRING. Instruction Manual

String.

Small weight.

1) Usingasmallweight(Weightedfuel pick-up

workswell) and string, feed thestring through

the wing as indicated.

2) Place the servo between the mounting

blocksand spaceit fromthehatch.Useapencil

to mark the mounting hole locations on the

blocks.

3) Use drill bit in a pin vise to drill the mouting

holes in the blocks.

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

mounting holes.Allow the C/Ato cure without

using accelerator.

5) Use dental floss to secure the connection

so they cannot become unplugged.

6) Secure the servo to the aileron hatch using

Phillips screwdriver and the screws provided

with the servo.

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

mounting tabs. Allow the C/A to cure without

using accelerator.

8) A string has been provided in the wing to

pull the aileron lead through to the wing root.

Remove the string from the wing at the servo

location and use the tape to attach it to the

servoextensionlead.Pull the leadthroughthe

wing and remove the string.

Because the size of servos differ, you

mayneed toadjustthesizeoftheprecut open-

ing in the mount. The notch in the sides of

themountallowtheservoleadtopassthrough.

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