Seagull Models CHEROKEE Manual de usuario

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ASSEMBLY MANUAL

MS:121

Specifications:

Wingspan-------------------------59.8in(152cm)

Wingarea--------------599.9sq.in(38.7sqdm)

Weight-------------------------------6.4lbs(2.9kg)

Length---------------------------46.4in(117.8cm)

Engine -------------.46-.55cu.in-----2-stroke.

.72 - .82cu.in -----4-stroke.

Radio-----------------4channelswith5servos.

“Graphics and specifications may change without notice”.

CHEROKEE Instruction Manual.

INTRODUCTION.

Thank you for choosing the CHEROKEE ARTF by SEAGULL MODELS. The CHEROKEE was

designedwiththeintermediate/advancedsportflyerinmind.Itisa semiscaleairplane whichiseasy

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 CHEROKEE 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 CHEROKEE . 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

proceduresdesigned tohelp thenewpilot onhis waytosuccessful R/Cflight. Theywillalso beable

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

KIT CONTENTS

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KIT CONTENTS.

1 Fuselage

2 Canopy

3 Left wing panel

4 Right wing panel

5 Tail set

6 Aluminum wing tube

7 Scale pilot w / seat

8 Seat (2)

9 Nose gear wire

10 70mm wheels (3)

11 Main landing gear

12 Decal sheet

13 Wheel pants (3)

14 EP conversion pack

15 Hardware bag included

16 Fiberglass cowl

ADDITIONAL ITEMS REQUIRED.

.46-.55 2-stroke engine

.72 -.82 4-stroke engine

4 channel with 5 servos

Glow plug to suit engine

Propeller to suit engine

Protective foam rubber for radio

system

Silicone fuel line

The control surfaces, including the

ailerons, elevators, and rudder, are

prehinged with hinges installed, but

the hinges are not glued in place. It

is imperative that you properly

adhere the hinges in place per the

steps that follow using a high-quality

thin C/A glue.

HINGING THE AILERONS .

Note:

1) Carefully remove the aileron from one

of the wing panels. Note the position of the

hinges.

2)Remove each hinge fromthewingpanel

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

each hinge. Slide each hinge into the aileron

untiltheT-pin is snug against the aileron.This

will help ensure an equal amount of hinge is

oneither sideofthehingeline whentheaileron

is mounted to the wing panel.

Hinge.

T-pin.

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 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

shouldbemaintainedbetweenthe wing panel

andaileron.

CHEROKEE Instruction Manual.

8)Afterbothailerons aresecurely 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.

6) Using C/A remover/debonder and a

papertowel,remove any excess C/A glue that

may have accumulated on the wing or in the

aileronhingearea.

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/A penetratesinto

both the aileron and wing panel.

4)Deflect the aileron and completely

saturate each hinge with thin C/A glue. The

aileronsfront surface shouldlightlycontactthe

wing during this procedure. Ideally, when the

Thehinge is constructed of aspecial

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.

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:

Hinge.

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Workthe aileronup anddown several

times to “work in” the hinges and

check for proper movement.

Note:

HINGING THE ELEVATORS.

Glue the elevator hinges in place using the

same techniques used to hinge the ailerons.

HINGING THE RUDDER.

Glue the rudder hinges in place using the

same techniques used to hinge the ailerons.

Hinge.

WING TIP ASSEMBLY.

Removecovering.

Fillepoxy.

Covering.

Wing tip.

1) Attach the plastic wing tip to the wing. Use a

hobby knife to remove the covering at the wing

end.

2) Apply the epoxy to the surface of both wing

tip and wing end. The plastic wing tip is held in

position and install it to the wing end. Please

see pictures shown.

CHEROKEE Instruction Manual.

3mm.

INSTALL THE AILERONS CONTROL

HORN.

2 sets.

3x35mm.

Install plastic wing tip to wing end.

Maskingtape.

Sealingiron.

3) Once the epoxy cures and use a covering

iron to seal the covering on the wing and over

the wing tip. 1) Locate the hardware necessary to install

the control horns for the ailerons.

2) Position the control horn on the bottom of

the aileron. You will see pre-drill hole 3mm for

the horn mounting screw on the aileron.

3) Place epoxy into hole. This will harden the

threads and prevent the crews from pulling

loose.

4) Thread a control horn end with aluminum

washer, lock nut until the top edge of the end is

18mm from the vase of the horn as shown.

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Aileron control horn .

ALUMINUMWASHER.

CONTROLHORN

M3 SCREW.

18mm.

Epoxy.

Wing

Epoxy.

M3LOCKNUT.

Install the elevator control horn using the

same method as same as the aileron control

horns.

INSTALL ELEVATOR CONTROL HORN.

2 sets.

AluminumWasher.

CONTROLHORNM3

M3LOCKNUT.

Epoxy.

AluminumWasher.

Horizontal

Stabilizer. Elevator.

3x30mm.

3mm.

18mm.

Epoxy.

Horizontal

Stabilizer. Elevator.

Elevatorcontrolhorn.

CHEROKEE Instruction Manual.

Repeatstepsto install the rudder control horn

as same as steps done for ailerons.

INSTALL RUDDER CONTROL HORN.

1 sets.

18mm.

Epoxy.

Rudder.

Aluminum Washer.

CONTROLHORN

M3 SCREW.

Aluminum Washer.

3x30mm.

Epoxy.

M3LOCKNUT.

Rudder control horn.

3mm.

5.5mm.

1) Locate the items necessary to install the

engine mount included with your model. .

ENGINE MOUNT INSTALLATION.

4x30mm.

2) Usefour 4x30mm head boltsandfour 4mm

washers to attach the engine mount rails to

thefirewall.Tighten the screws . Make sureto

use threadlock on the screws to help prevent

them from vibrating loose.

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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.

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.

2) Usingamodelingknife,cutonelength

ofsiliconfuel line. Connect one end of theline

totheweightedfuelpickup andtheotherend

to the nylon pick up tube.

3) Carefully bend the second nylon tube

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

Venttube. Fuel pick up tube.

Fuel fill 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

thetankisinstalledinsidethefuselage,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.

CHEROKEE Instruction Manual.

Blow through one of the lines to en-

sure the fuel lines have not become kinked

inside the fuel tank compartment. Air

should flow through easily.

venttube.

Fuelpick-uptube.

Fuelfilltube.

INSTALLING THE FUSELAGE SERVOS.

Throttle servo.

Elevator servo.

Rudder servo.

1) Installtherubbergrommetsandbrass

colletsontothethrottle servo. Test fit theservo

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

mayneed toadjustthe sizeoftheprecut open-

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

mount allow the servo lead to pass through.

Fueltank.

C/Aglue.

Fueltank.

Balsa.

Plywood template.

8) Use plywood template to hold in place the

fuel tank with C/A glue to secure the fuel tank

inside the fuselage.

9) Use balsa stick to help prevent moveable

from transferring to the fuel tank.

10) 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.

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