Seagull Models HARRIER 3D User manual

Hand-made Almost Ready to Fly R/C Model Aircraft

ASSEMBLY MANUAL

MadeinVietnam.

Kit features

• Ready-made—minimalassembly&finishingrequired.

• Ready-coveredcovering.

• Factory-installed enginemount.

• Photo-illustratedstep-by-stepAssemblyManual.

HARRIER 3D

Specifications

Wingspan----------------------------------------60.5in----------------------------154cm.

Wing area-------------------------------- 948.38 sq.in-------------------- 61.18 sq.dm.

Approximate flying weight--------------------7-8lbs--------------------- 3.17-3.62kg.

Length-----------------------------------------------66in------------------------167.64cm.

Recommended engine size--------- .61-1.00 cu. in---------------------- 2-stroke.

--------- .91-1.10 cu.in----------------------- 4-stroke.

Radio System required 4 channel with 6 servos.

Flying skill level Intermediate/advanced.

HARRIER 3D Instruction Manual

INTRODUCTION

ThankyouforchoosingtheHarrier3DARTFbySEAGULLMODELS.TheHarrier3Dwasdesigned

withtheintermediate/advancedsport flyer in mind. Itisa 3D airplane whichiseasytoflyandquick

toassemble.Theairframeisconventionallybuiltusingbalsa,plywoodandveneertomakeitstronger

thanthe average ARTF, yet thedesign allowsthe aeroplane tobe kept light.You willfind that most

oftheworkhasbeendoneforyoualready. Themotormounthasbeenfittedandthehingesarepre-

installed . Flying the Harrier 3D 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 Harrier 3D . 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.

IfyouareinexperiencedwithbasicR/CflightwestronglyrecommendyoucontactyourR/Csupplier

and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training

proceduresdesignedtohelpthenewpilotonhiswayto successful R/C flight. They will also be able

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

ADDITIONAL ITEMS REQUIRED

.61-1.00 2-stroke engine

.91-1.10 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 with pre-installed

aileron

(1) Left wing half with pre-installed

aileron

(2) Aluminium dihedral brace

Tail section assembly

(1) Vertical stabilizer with pre-

installedrudder

(1) Horizontal stabilizer with pre-

installed elevator halves

Some more parts.

HARDWAREPACK

COWLING

Landing gear.....

HARRIER 3D Instruction Manual

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-

sembly as the Harrier 3D is made

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.Donot let thesechemi-

calscome incontact withthe colours

onthecoveringand the plasticparts.

HARRIER 3D Instruction Manual

4)Deflect the aileron and completely

saturate each hinge with thin C/A glue. The

aileronsfrontsurfaceshould 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:

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 you properly adhere the

hingesin place per the steps that follow

usinga high-qualitythin C/A glue.

1) Carefully remove the aileron from one

of the wing panels. Note the position of the

hinges.

2)Removeeach hinge from thewingpanel

and aileron and place a T-pin in the center of

each hinge. Slide each hinge into the aileron

untiltheT-pinis snugagainst the aileron.This

will help ensure an equal amount of hinge is

oneithersideofthehingelinewhentheaileron

is mounted to the wing panel.

HINGINGTHE AILERONS

Note:

The hinge is constructed of a special

material that allows the C/A to wick or

penetrateanddistributethroughout the

hinge, securely bonding it to the wood

structureof the wingpanel and aileron.

3) Slide the aileron on the wing panel 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 wing panel

andaileron.

5)Turn the wingpanel over anddeflect the

aileron in the opposite direction from the

opposite side. Apply thin C/A glue to each

hinge,makingsure that the C/Apenetratesinto

both the aileron and wing panel.

6) Using C/A remover/debonder and a

papertowel, remove anyexcessC/A glue that

may have accumulated on the wing or in the

aileronhinge area.

HARRIER 3D 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.

Note:Work the aileron up and down several

times to “work in” the hinges and check

for proper movement.

7) Repeat this process with the other wing

panel, securely hinging the aileron in place.

1) Carefully remove the elevator from one

of the horizontal stabilizer panels. Note the

position of the hinges.

2) Remove each hinge from the horizontal

stabilizerpaneland elevator andplace a T-pin

in the center of each hinge. Slide each hinge

intothe elevatoruntil theT-pinis snug against

the elevator. This will help ensure an equal

amount of hinge is on either side of the hinge

line when the elevator is mounted to the

horizontal stabilizer panel.

HINGINGTHE ELEVATORS

3) Slide the elevator on the horizontal

stabilizer panel until there is only a slight gap.

The hinge is now centered on the horizontal

stabilizer panel and elevator. Remove the T-

pins and snug the elevator against the

horizontal stabilizer panel. A gap of 1/64” or

less should be maintained between the

horizontal stabilizer panel and elevator.

4)Deflect the elevator and completely

saturate each hinge with thin C/A glue. The

elevators front surface should lightly contact

thehorizontal stabilizer during this procedure.

Ideally, when the hinges are glued in place, a

1/64”gaporlesswillbemaintainedthroughout

the lengh of the elevator to the horizontal

stabilizer panel hinge line.

Note: The hinge is constructed of a special

material that allows the C/A to wick or

penetrateanddistributethroughout the

hinge, securely bonding it to the wood

structure of the horizontal stabilizer

paneland elevator.

5) Turn the horizontal stabilizer panel over

and deflect the elevator in the opposite

directionfromthe opposite side.ApplythinCA

glue to each hinge, making sure that the C/A

penetratesintoboth the elevatorandhorizontal

stabilizer panel.

HARRIER 3D Instruction Manual

6) Using C/A remover/debonder and a

papertowel, remove anyexcessC/A glue that

may have accumulated on the horizontal

stabilizer or in the elevator hinge area.

8) After both horizontal stabilizer are

securely hinged, firmly grasp the horizontal

stabilizer panel and elevator to make sure the

hingesaresecurely gluedandcannotbepulled

out. Do this by carefully applying medium

pressure,trying toseparate theelevator from

thehorizontalstabilizer panel. Usecautionnot

to crush the horizontal stabilizer structure.

7) Repeat this process with the other

horizontalstabilizerpanel,securelyhingingthe

elevator in place.

Using a small weight (Weighted fuel pick-up

workswell)andthread, feedthestring through

the wing as indicated.

INSTALLING THEAILERON SERVOS

Attacha12 inchservoleadtotheaileronservo.

Attachthestring to the servoleadandcarefully

thread it though the wing. Once you have

thread the lead throught the wing, remove the

string so it can use for the other servo lead.

Tape the servo lead to the wing to prevent it

from falling back into the wing.

HARRIER 3D Instruction Manual

Because the size of servos differ,

you may need to adjust the size of

the precut opening in the mount. The

notch in the sides of the mount allow the

servo lead to pass through.

2) Install the aileron servo into the servo

mount, withthe output shafttowards thelead-

ing edge of the wing, using the wood screws

provided with your radio system. Drill 1mm

pilot holes through the mount.

Repeat the procedure for the other wing

half.

AILERON LINKAGE

INSTALLINGTHEAILERONLINKAGE

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

line as below picture.





2) Locate the nylon control horns,nylon

control horn backplates and two machine

screws.





3) Position the aileron horn on the bot-

tom side of aileron. The clevis attachment

holesshouldbepositioned over thehingeline.



 4)Usinga1.5mmdrillbitandthecontrol

horns as a guide, drill the mounting holes

through the aileron halves.

 6)Thread one nylon adjustable control

horn on to each aileron control rod. Thread

the horns on until they are flush with the ends

of the control rods.

 

5)Mount the control horns by inserting

the bolts through the control horn bases and

aileron halves, then into the mounting

backplates.Do Not overtightenthe nuts orthe

backplates may crush the wood.

1) Install the rubber grommets and brass

colletsonto theaileronservo. Testfitthe servo

into the aileron servo mount.

(2)2MMx30mm.

ControlHorn.

MountingScrews. Mounting Plate.

Straightline.

HARRIER 3D Instruction Manual

PARTSREQUIRED

FUEL TANK

{1} Molded Nylon FuelTank

{1} Preassembled StopperAssembly

{1} Metal Weighted Pick-Up

{1} Silicon tube

INSTALLING THE STOPPERASSEMBLY

 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.

2) Usinga modeling knife,cut onelength

of silicon fuel line. Connect one end of the

line to the weighted fuel pickup and the other

end to the nylon pickup tube.

3) Carefully bend the second nylon tube

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

HARRIER 3D Instruction Manual

5) With the stopper assembly in place, the

weighted pickup should rest away from the

rearofthe tankandmovefreelyinsidethetank.

Thetop of thevent tubeshould rest justbelow

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 3mm 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.

Carefully use a lighter or heat gun to

permenently set the angle of the vent tube.

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.

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.

Slide the tank into the fuselage from inside so

that the neck is at the top of the fuselage and

itlocates through theengine bulkhead. Gently

secure it to the top horizontal former with a

cable tie.

Blow through one of the lines to ensure

thefuel lines have not becomekinked in-

sidethefueltankcompartment. Airshouldflow

througheasily.

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.

Attach the silicone fuel and pressure pipes to

the tank. The lower pipe is the ‘feed’ and the

upper two the ‘pressure and fill’. The fill pipe

is the next pipe.

HARRIER 3D Instruction Manual

WHEELAND WHEELPANTS

1)Assembleand mounting thewheelpants

as shown in the following pictures.

 2) Follow diagram below for wheel pant

installation:

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

cutting and cut-off wheel.



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.

WheelCollar.

Axle.

Wheel. Nut.

Wheel Pant.

LandingGear.

Nut.

(2)Washer.

8 mm.

(2)Wheel Collar.

Axle.

Wheel. Nut.

Nut.

(2)Washer.

Landing gear.

Caution when cutting the axles and wear

protective goggles.

46mm

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