Seagull Models SEA 304 User manual
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Specications:
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.
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ankyouforchoosingthe DHC-1CHIPMUNKARTFbySGMODELS. e DHC-1CHIP-
MUNK was designed with the intermediate/advanced sport yer in mind. It is a semi scale air-
planewhichiseasytoyandquicktoassemble.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 andthehingesarepre-installed.FlyingtheDHC-1CHIPMUNK issimply a 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 oer 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
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6
2
7
10
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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 channel with 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.
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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) Deect 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.
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5) Turn the wing panel over and deect 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) Aer 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.
Epoxy.
Fiberglass control horn
Fiberglass control horn
INSTALLING THE AILERON SERVOS
DHC-1 CHIPMUNK Instruction Manual.
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Because the size of servos dier, 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 or heatshrunk tube to
secure the connection so they cannot be-
come 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
Minimum servo spec.
Torqu e : 80 oz-in (5.8 kg-cm) @ 4.8V;
100 oz-in (7.2 kg-cm) @ 6.0V
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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.
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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.
9
Use a 6 to 12
volt battery.
DHC-1 CHIPMUNK Instruction Manual.
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This manual suits for next models
1
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