Seagull Models DHC-1 Chipmunk User manual

Specications:

Wingspan--------------- 80.0 in (203.2 cm).

Wing area--------------- 937.8 sq.ins (60.5 sq.dm).

Weight------------------- 10.4 lbs (4.7 kg).

Length------------------- 57.2 in (145.2 cm).

Engine/Motor size----- 20cc gasoline.

Radio--------------------- 5 channels with 7 servos.

ASSEMBLY MANUAL

Code : SEA 304

DHC-1 CHIPMUNK Instruction Manual.

ankyouforchoosingthe DHC-1CHIPMUNKARTFbySGMODELS. e DHC-1CHIP-

MUNK was designed with the intermediate/advanced sport yer in mind. It is a semi scale air-

planewhichiseasytoyandquicktoassemble.eairframeisconventionallybuiltusingbalsa,

plywood to make it stronger than the average ARTF, yet the design allows the aeroplane to be

kept light. You will nd that most of the work has been done for you already. e motor mount

hasbeen tted andthe hingesarepre-installed.FlyingtheDHC-1CHIPMUNK is simplya joy.

is instruction manual is designed to help you build a great ying aeroplane. Please read

this manual throughly before starting assembly of your DHC-1 CHIPMUNK Use the parts

listing below to indentify all parts.

Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it is ca-

pable of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE YOU

ASSUME ALL RISK & REPONSIBILITY.

If you are inexperienced with basic R/C ight we strongly recommend you contact your R/C

supplier and join your local R/C model Flying Club. R/C Model Flying Clubs oer a variety

of training procedures designed to help the new pilot on his way to successful R/C ight.

ey will also be able to advise on any insurance and safety regulations that may apply.

INTRODUCTION.

WARNING.

KIT CONTENTS

KIT CONTENTS.

SEA304 DHC-1 CHUPMUNK

1. Fuselage

2. Wing set (2)

3. Tail set (2)

4. Canopy

5. Cowling

6. Wing tube

7. Pilot

8. Wheel pants

9. landing gear

10. Fuel tank

11. Tail wheel

ADDITIONAL ITEMS REQUIRED.

TOOLS & SUPPLIES NEEDED.

in cyanoacrylate glue.

Medium cyanoacrylate glue.

30 minute epoxy.

5 minute epoxy.

Hand or electric drill.

Assorted drill bits.

Modelling knife.

Straight edge ruler.

2mm ball driver.

Phillips head screwdriver.

220 grit sandpaper.

90° square or builder’s triangle.

Wire cutters.

Masking tape & T-pins.

read-lock.

Paper towels.

�20cc gasoline engine.

�Computer radio 5 with chanlel 7

servos.

�Glow plug to suit engine.

�Propeller to suit engine.

�Protective foam rubber for radio

system.

HINGING THE FLAP.

2x10mm

DHC-1 CHIPMUNK Instruction Manual.

HINGING THE AILERON.

Note : e control surfaces, including the ailer-

ons, 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 us-

ing a high-quality thin C/A glue.

1) Carefully remove the aileron from one

of the wing panels. Note the position of the

hinges.

2) Remove each hinge from the wing 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. is will help ensure an equal amount

of hinge is on either side of the hinge line

when the aileron is mounted to the aileron.

3) Slide the wing panel on the aileron until

there is only a slight gap. e hinge is now

centered on the wing panel and aileron. Re-

move the T-pins and snug the aileron against

the wing panel. A gap of 1/64” or less should

be maintained between the wing panel and

aileron.

NOTE : e hinge is constructed of a spe-

cial 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.

4) Deect the aileron and completely satu-

rate each hinge with thin C/A glue. e ailer-

ons front surface should 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.

Hinge.

T-pin.

Epoxy.

Hinge.

5) Turn the wing panel over and deect the

aileron in the opposite direction from the

opposite side. Apply thin C/A glue to each

hinge, making sure that the C/A penetrates

into both the aileron and wing panel.

6) Using C/A remover/debonder and a paper

towel, remove any excess C/A glue that may

have accumulated on the wing or in the

aileron hinge area.

7) Repeat this process with the other wing

panel, securely hinging the aileron in place.

8) Aer both ailerons are securely hinged,

rmly grasp the wing panel and aileron to

make sure the hinges are securely glued and

cannot be pulled out. Do this by carefully ap-

plying medium pressure, trying to separate

the aileron from the wing panel. Use caution

not to crush the wing structure.

Work the aileron up and down sev-

eral times to “work in” the hinges

and check for proper movement.

Note :

INSTALL THE AILERONS

CONTROL HORN.

Epoxy.

Fiberglass control horn

INSTALLING THE ALLERON SERVOS

DHC-1 CHIPMUNK Instruction Manual.

Because the size of servos dier, you

may need to adjust the size of the precut

opening in the mount. e notch in the

sides of the mount allow the servo lead to

pass through.

1) Place the servo between the mounting

blocks and space it from the hatch. Use a

pencil to mark the mounting hole loca-

tions on the blocks.

2) Use drill bit in a pin vise to drill the

mouting holes in the blocks.

4) Use dental oss to secure the connec-

tion so they cannot become unplugged.

5) Secure the servo to the aileron hatch

using Phillips screwdriver and the screws

provided with the servo.

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

of the mounting tabs. Allow the C/A to

cure without using accelerator.

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

of the mounting holes. Allow the C/A to

cure without using accelerator.

1.5mm

C/A glue

7) Remove the string from the wing at the

servo location and use the tape to attach it

to the servo extension lead. Pull the lead

through the wing and remove the string.

8) Set the aileron hatch in place and use a

Phillips screw driver to install it with four

wood screws.

AILERON PUSHROD INSTALLATION.

Please see below pictures.

2x10mm

C/A glue

DHC-1 CHIPMUNK Instruction Manual.

40mm

80mm

M3 clevis. M3 lock nut.

INSTALLING THE FLAP SERVO.

Repeat the procedure for the ap servo.

INSTALLING THE FLAP PUSHROD.

Repeat the procedure for the aileron

pushrod.

40mm

80mm

M3 clevis. M3 lock nut.

INSTALLING LANDING GEAR.

1)Locate items necessary to install Sprin

Landing Gear.

Use a 6 to 12

volt battery.

DHC-1 CHIPMUNK Instruction Manual.

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