Seagull Models Extra 300S Manual de usuario

MadeinVietnam.

ASSEMBLY MANUAL MS: 70

“Graphics and specfications may change without notice”.

Kit features.

• Ready-made—minimalassembly&finishingrequired.

• Ready-coveredcovering.

• Photo-illustratedstep-by-stepAssemblyManual.

Specifications

Wingspan----------------------------------------63in----------------------------160cm.

Wing area------------------------------------- 662.8 sq.in---------------- 42.8 sq.dm.

Approximate flying weight---------------- 6.6-7.5 lbs------------------- 3.0-3.2kg.

Length--------------------------------------------45.9in------------------------116.7cm.

Recommended engine size----------- .61-75 cu.in--------------------- 2-stroke.

.72 - 1.15 cu.in------------- 4-stroke.

Radio System required 4 channels with 6 servos.

Flying skill level Intermediate/advanced.

EXTRA 300S Instruction Manual

INTRODUCTION.

ThankyouforchoosingtheEXTRA300S ARTFbySEAGULLMODELS.The EXTRA300S was

designedwith theintermediate/advanced sport flyer in mind.It isa scale airplane which iseasy 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

thatmostoftheworkhasbeendoneforyoualready. Themotormounthasbeenfittedandthehinges

are pre-installed . Flying the EXTRA 300S 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 300S. 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

proceduresdesignedtohelpthenewpilot on hisway tosuccessful R/Cflight. Theywillalsobeable

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

ADDITIONAL ITEMS REQUIRED.

.61-.75 2-stroke engine

.72-1.15 4-stroke engine

Computer radio with six 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

(1) Canopy hatch

WING ASSEMBLY

(1) Right wing half/ aileron

(1) Left wing half with/ aileron

(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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NOTE: To avoid scratching your new aero-

planewesuggestthatyoucoveryour

workbench with an old towel. Keep a

couple of jars or bowls handy to hold

the small parts after you open the

bags.

Pleasetrialfitallparts.Makesureyou

have the correct parts and that they

fit and are aligned properly before

gluing! This will ensure proper as-

semblyasthe EXTRA 300Sismade

from natural materials and minor ad-

justments may have to be made.

The paint and plastic parts used in

this kit are fuel proof. However, they

arenottolerantofmanyharshchemi-

cals including the following: paint

thinner, cyano-acrylate glue accel-

erator,cyanoacrylategluede-bonder

andacetone.Do notletthese chemi-

calscome in contact with thecolours

onthecovering andtheplastic parts.

1) Carefully remove the aileron from one

of the wing panels. Note the position of the

hinges.

2)Remove eachhinge fromthe wingpanel

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.

HINGING THE AILERONS.

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 maintainedbetween the 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 adherethe

hingesin placeper thesteps thatfollow

using a high-quality thin C/A glue.

Note:

Hinge.

T-pin.

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

structureof thewing panel andaileron.

C/Aglue.

T-pin.

EXTRA 300S Instruction Manual

3x20mm.

HINGING THE ELEVATOR.

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.

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,makingsurethattheC/Apenetratesinto

both the aileron and wing panel.

6) Using C/A remover/debonder and a

papertowel, removeanyexcess C/Aglue that

may have accumulated on the wing or in the

aileronhinge area.

HINGING THE RUDDER.

Glue the elevator hinges in place using the

same tectniques used to hinge the ailerons.

Glue the rudder hinges in place using the

same tectniques used to hinge the ailerons.

Work the aileron up and down several

times to “work in” the hinges and check

for proper movement.

Note:

TURNBUCKLE INSTALLATION.

Theholelocation of turnbucklesshownin pic-

ture below .

Installingthe turnbucklefor tailstrut of hori-

zontal fin as same as pictures below.

See pictures below:

ENGINE MOUNT INSTALLATION.

Mark and drill 4 holes for engine mount.

Insert 4 blind nuts to firewall.

C/Aglue.

Pre-drilledatfactory.

Horizontal fin bottom.

Turnbuckle.

4x25mm.

Thread locker glue.

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2) Usinga modelingknife, cutone length

ofsilicon fuel line. Connectone endof the line

tothe weightedfuel pickup and theother end

to the nylon pick up tube.

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.

Carefully use a lighter or heat gun to

permenently set the angle of the vent 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.

Venttube. Fuel pick up tube.

Fuel fill tube.

Silicon tubing not inclued. 5) With the stopper assembly in place,

the weighted pick-up should rest away from

therear of thetank and movefreely 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.

EXTRA 300S Instruction Manual

1) Assembleand mounting the wheel pants

as shown in the following pictures.

2) Follow diagram below for wheel pant

installation:

Blow through one of the lines to ensure

thefuel lines havenot become kinked in-

side the fuel tank compartment. Air should

flowthrough easily.

WHEELAND WHEEL PANTS INSTALLA-

TION.

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

cutting and cut-off wheel.

Caution when cutting the axles and

wear protective goggles.

Fuel pick-up

tube. Fuelfill tube.

Venttube.

FUEL TANK INSTALLATION.

Plastic tape.

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.

Rubber band.

Fueltank. Wheel Collar.

Axle.

Wheel. Nut.

Wheel Pant.

LandingGear.

Nut.

(2)Washer.

46mm

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(2)Wheel Collar.

Axle.

Wheel. Nut.

Nut.

(2)Washer.

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

drill the mounting holes through the engine

mount at the four locations marked.

 2) Place your engine onto the engine

mount. Adjust the engine is centered of the

edges of the engine case.

 3) When you are satisfied with the align-

ment, mark the locations of the engine

mounting.



1) Install the pushrod housing through the

predrilledholein thefirewalland intotheservo

compartment. The pushrod housing should

protrude 1/4" out past the front of the firewall.

Makea Z-Bend1/4"from oneend of theplain

wire pushrod.

MOUNTING THE ENGINE.

4) 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.

1) The blind nuts for securing the landing

gearare alreadymountedinside thefuselage.

2) Using the hardware provided, mount

the main landing gear to the fuselage.

INSTALLING THE MAIN LANDING GEAR.

4x20mm.

Landinggear.

130mm

EXTRA 300S Instruction Manual

Trimand cut.

 6) AttachtheZ-Bend inthepushrod wireto

the throttle arm on the carburetor.

COWLING INSTALLATION.

1) Slide the fiberglass cowl over the en-

gineandline uptheback edgeofthe cowlwith

themarks youmade onthe fuselagethen trim

and cut.

Trimand cut.

2) While keeping the back edge of the

cowl flush with the marks, align the front of

thecowlwiththe crankshaft oftheengine. The

front of the cowl should be positioned so the

crankshaft is in nearly the middle of the cowl

opening.Usethespinnerbackplateasaguide.

Hold the cowl firmly in place using pieces of

masking tape.

Becauseof thesizeof thecowl, itmay be nec-

essaryto usea needlevalve extensionfor the

highspeed needle valve. Makethis outofsuf-

ficient length 1.5mm wire and install it into the

end of the needle valve. Secure the wire in

placeby tighteningthe setscrew inthe sideof

the needle valve.

 5) Bolttheenginetotheenginemountusing

the four machine screws. Double check that

all the screws are tight before proceeding.

4.2mm.

Pushrodwire.

MachineScrew 4x30mm. Machine Screw 3x10mm.

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3) Installthemufflerandmufflerextension

onto the engine and make the cut out in the

cowl for muffler clearance. Connect the fuel

and pressure lines to the carburetor, muffler

and fuel filler valve. Secure the cowl to fuse-

lage using the 3x10mm screws (4).

Install the spinner backplate, propeller and

spinner cone.

INSTALLING THE SPINNER.

INSTALLING THE FUSELAGE SERVO.

1) Installthe rubbergrommets andbrass

colletsonto thethrottleservo. Testfit 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

mayneedtoadjust thesizeoftheprecut open-

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

mount allow the servo lead to pass through.

The 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.

Throttle servo.

Rudder

servo. Elevator servo.

Elevator servo.

EXTRA 300S Instruction Manual

THROTTLE SERVO ARM INSTALLATION.

1) Install adjustable servo connector in

the servo arm as same as picture below:

2)Usingamodelingknife,carefullyremove

thecovering at mountingslot ofhorizontalsta-

bilizer ( both side of fuselage).

 3) Slide the stabilizer into place in the pre-

cut slot in the rear of the fuselage. The stabi-

lizer should be pushed firmly against the front

of the slot.

HORIZONTALSTABILIZER.

1) Using a ruler and a pen, locate the

centerlineof the horizontalstabilizer,atthetrail-

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

thismark downthe backof thetrailing edgeof

the stabilizer.

 4) With the stabilizer held firmly 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 left sides and top and

bottom of the stabilizer.

Pen.

 5) Remove the stabilizer. Using thelines

youjust drewas aguide, carefullyremove the

covering from between them using a model-

ingknife.

Centerline.

Throttle servor arm .

Rudder

servo. Elevator servo.

Elevator servo.

Removecovering.

INSTALLING THE SWITCH.

Installthe switchintothe precuthole inthe

side of fuselage.

Switch.

AdjustableServo

connector.

Servoarm.

Nut.

Threadlocker glue.

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