Seagull Models DECATHLON ARTF User manual

MadeinVietnam.

“Graphics and specifications may change without notice”.

Kit features.

• Ready-made—minimalassembly&finishingrequired.

• Ready-coveredcovering.

• Photo-illustratedstep-by-stepAssemblyManual.

Specifications

Wingspan--------------------------------------70.9in------------------------------180cm.

Wingarea--------------------------------------837sq.in------------------------54sq.dm.

Approximate flying weight------------------7.5-8.8 lbs---------------------3.4-4.0kg.

Length------------------------------------------47.6in-------------------------------121cm.

Recommended engine size-------------- .75cu.in-------------------------- 2-stroke.

.91cu.in--------------------------4-stroke.

Radio System required 4 channels with 6 servos

Flying skill level Intermediate/advanced.

ASSEMBLY MANUAL

MS: 86

DECATHLON _ CODE SEA 86.Instruction Manual

INTRODUCTION.

Thank you for choosing the DECATHLON ARTF by SEAGULL MODELS. The DECATHLON

wasdesignedwiththeintermediate/advancedsportscaleinmind.Itisasemiscale airplane which

iseasytoflyandquicktoassemble.Theairframeisconventionallybuiltusingbalsa,plywoodtomake

itstrongerthantheaverageARTF,yetthedesignallowstheaeroplanetobekeptlight.Youwillfind

thatmostoftheworkhasbeendoneforyoualready. Themotormounthasbeenfittedandthehinges

are pre-installed . Flying the DECATHLON 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 DECATHLON. 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

proceduresdesignedtohelpthenewpilotonhiswaytosuccessfulR/Cflight. They will also be able

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

ADDITIONAL ITEMS REQUIRED.

.75cu.in 2-stroke engine

.91cu.in 4-stroke

4 channel with 6 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

PARTS LISTING.

FUSELAGE ASSEMBLY

(1) Fuselage

WING ASSEMBLY

(1) Right wing

(1) Left wing

(1) Aluminium dihedral brace

Tail section assembly

(1) Horizontal stabilizer/ elevator

halves.

(1) Rudder halves.

Some more parts.

HARDWAREPACK

COWLING

Landinggear.....

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1) Carefully remove the aileron from one

of the wing panels. Note the position of the

hinges.

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 on eithersideofthe hinge linewhen

the aileron is mounted to the aileron.

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.A gap of 1/64” or less

shouldbe maintained betweenthe wingpanel

andaileron.

The control surfaces, including the

ailerons, elevators, and rudder, are

prehinged with hinges installed, but the

hinges are not glued in place. It is

imperativethat youproperly adhere the

hingesin placeper thesteps thatfollow

using a high-quality thin C/A glue.

Note:

4)Deflect the aileron and completely

saturate each hinge with thin C/A glue. The

aileronsfrontsurface should lightlycontactthe

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 throughout the

hinge, securely bonding it to the wood

structureof the wingpanel andaileron.

To avoid scratching your new aero-

plane we suggest that you cover your work-

benchwith anold towel. Keepa coupleof jars

orbowlshandytoholdthesmallpartsafteryou

open the bags.

Pleasetrialfitallparts.Makesureyouhavethe

correct parts and that they fit and are aligned

properlybeforegluing!Thiswillensureproper

assemblyasthe DECATHLON ismadefrom

natural materials and minor adjustments may

havetobemade. Thepaintandplasticparts

usedinthiskitarefuelproof.However,theyare

not tolerant of many harsh chemicals includ-

ingthefollowing:paintthinner,cyano-acrylate

glueaccelerator,cyanoacrylategluede-bonder

andacetone.Donotletthesechemicalscome

incontactwiththecoloursonthecoveringand

the plastic parts.

NOTE:

HINGING THE AILERONS.

Hinge.

T- pin.

Hinge.

T- pin.

C/Aglue.

DECATHLON _ CODE SEA 86.Instruction Manual

8)Afterbothailerons are securelyhinged,

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.

TURNBUCKLE INSTALLATION.

Installing the turnbuckle for the wing as

same as pictures below.

Work the aileron up and down several

times to “work in” the hinges and check

for proper movement.

Note:

5)Turn thewing panel overand deflect the

aileron in the opposite direction from the

opposite side. Apply thin C/A glue to each

hinge,makingsurethattheC/Apenetratesinto

both the aileron and wing panel.

6) Using C/A remover/debonder and a

papertowel, remove anyexcess C/A gluethat

may have accumulated on the wing or in the

aileronhinge area.

Theholelocationof turnbuckles showninpic-

ture below .

Washer.

washer. Turnbuckle.

3x20mm.

TURNBUCKLE INSTALLATION.

Theholelocationof turnbuckles showninpic-

ture below .

The mounting holes of turnbuckle was

pre-drilled at factory.

Turnbuckle.

388mm.

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HINGING THE RUDDER.

Glue the rudder hinges in place using the

same tectniques used to hinge the ailerons.

Aileron control horn: See pictures below.

AILERON CONTROLHORN

ELEVATOR CONTROL HORN.

M3LOCK

NUT.

ALUMINUMWASHER.

CONTRONLHORN

M3 SCREW.

16mm.

Epoxy.

Wing

Epoxy.

Wing

Hinge.

Install the elevator control horn using the

same method as with the aileron control

horns.

2 sets.

3x35mm.

Wing. Aileron.

Installingthe turnbucklefor tailstrut ofhori-

zontal fin as same as pictures below.

Horizontal fin bottom.

Turnbuckle.

Tail fin bottom.

2 sets.

3x40mm.

DECATHLON _ CODE SEA 86.Instruction Manual

16mm.

See pictures below.Make yourself the

template of your engine on paper.

ENGINE MOUNT INSTALLATION.

4x30mm.

Rudder control horn:

Usingthesametectniquesusedaileroncontrol

horn. See picture below.

2 sets.

3x35mm.

EPOXY.

Rudder control horn.

Rudder.

FUSELAGE.

RUDDER CONTROL HORN.

Elevator control horn.

CONTRONL HORN

M3 SCREW.

M3 LOCK NUT.

ALUMINUMWASHER. EPOXY.

FUSELAGE.

ALUMINUMWASHER.

Rudder.

Aluminum Washer.

16mm.

CONTRONL HORN M3

M3LOCKNUT.

Epoxy.

Aluminum Washer.

Horizontal

Stabilizer.

Horizontal

Stabilizer.

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Mark and drill 4 holes for engine mount.

Insert 4 blind nuts to firewall.

2) Usinga modelingknife, cut one length

ofsilicon fuel line. Connectone end ofthe line

tothe weightedfuel pick up and the otherend

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

not included).

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 STOPPER ASSEMBLY.

Thread locker glue.

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.

5) With the stopper assembly in place,

the weighted pick-up should rest away from

therear of thetank 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.

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.

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.

DECATHLON _ CODE SEA 86.Instruction Manual

Fuel pick-up tube.

Fuelfill tube.

Venttube.

Blow through one of the lines to ensure

thefuel lines have not becomekinked in-

side the fuel tank compartment. Air should

flowthrough easily.

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.

C/Aglue attched.

Fueltank.

Plastic tape.

Balsa Block.

2) Follow diagram below for wheel pant

installation:

wheel collar.

wheel.

Axle.

Washer. M3.

wheel Pant.

wheel.

M3.

wheel collar.

nut. Axle.

Washer.

1) Assembleand mounting thewheelpants

as shown in the following pictures.

WHEEL AND WHEEL PANTS

INSTALLATION.

M3.

12mm.

5mm.

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1) The blind nuts for securing the landing

gearare already mountedinside the fuselage.

2) Using the hardware provided, mount

the main landing gear to the fuselage.

INSTALLING THE MAIN LANDING GEAR.

M4 x 10mm.

M4 x 20mm.

M4 x 10mm.

3) A drop of C/A glue on the wheel collar

screws will help keep them from coming lose

duringoperation.

Repeat the process for the other wheel.

LandingGear. wheel Pant.

Lockerglue.

MOUNTING THE ENGINE.

3) Remove the engine. Using an drill bit,

drill the mounting holes through the engine

mount at the four locations marked.

 1) Place your engine onto the engine

mount. Adjust the engine is centered of the

edges of the engine case.

 2) When you are satisfied with the align-

ment, mark the locations of the engine

mounting.

AlumiumSpar.

140mm

AlumiumSpar.

DECATHLON _ CODE SEA 86.Instruction Manual

COWLING INSTALLATION.

MachineScrew 3x10mm.

1.5mmwere

(needlevalve).

Trim and cut.

Pushrodwire.

Trim and cut.

 4) Bolttheenginetotheenginemountusing

the four machine screws. Double check that

all the screws are tight before proceeding.

4.2 mm diameter.

MachineScrew 4x30mm.

Pushrodwire.

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