1
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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ank you for choosing the DHC-1 CHIPMUNK ARTF by SG MODELS . e DHC-1 CHIP-
MUNK was designed with the intermediate/advanced sport yer in mind. It is a semi scale air-
plane which is easy to y and quick to assemble. e 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 nd that most of the work has been done for you already. e motor mount
has been tted and the hinges are pre-installed. Flying the DHC-1 CHIPMUNK is simply 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 capable 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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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.
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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 using 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. Remove 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 special 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 saturate each hinge with thin C/A glue. e ailerons 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.
Ep ox y.
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 applying 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 several times to “work in” the hinges
and check for proper movement.
Note :
INSTALL THE AILERONS
CONTROL HORN.
Ep ox y.
Ep ox y.
Fiberglass control horn
Fiberglass control horn
INSTALLING THE ALLERON 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 locations 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 connection 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
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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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Instruction Manual.
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Elevator servo arm .
INSTALLING THE RECEIVER SWITCH.
Install the switch into the precut hole in
the side, in the fuselage.
Rudder servo arm.
rottle servo arm.
2) Secure the servos with the screws provided with your radio system.
Rudder servo.
rottle servo.
.
INSTALLING THE FUSELAGE SERVOS.
.
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) Install the rubber grommets and brass
collets into all servos. Test t the servos
into the fuselage servo mounts.
3/32” Hole.
Elevator servo.
.
Switch.
INSTALLING THE ENGINE SWITCH.
Trim and cut.
Switch.
Trim and cut.
DHC-1 CHIPMUNK
Instruction Manual.
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INSTALLING THE STOPPER
ASSEMBLY.
1) Using a modeling knife, carefully cut
o the rear portion of one of the 3 nylon
tubes leaving 1/2” protruding from the
rear of the stopper. is will be the fuel
pick up tube.
2) Using a modeling knife, cut one length
of silicon fuel line. Connect one end of
the line to the weighted fuel pick up and
the other end to the nylon pick up tube.
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 the
tank is installed inside the fuselage, it may be
dicult to determine which is which.
7) Use balsa block to hold in place the fuel
tank with C/A glue to secure the fuel tank.
3) Carefully bend the second nylon tube up
at a 45º angle. is tube is the vent tube.
Vent tube.
Fuel pick up tube.
Fuel fill tube.
4) Test t the stopper assembly into the tank.
It may be necessary to remove some of the
ashing around the tank opening using a
modeling knife. If ashing is present, make
sure none falls into the tank.
6) When satised with the alignment of the
stopper assembly tighten the 3 x 20mm machine screw until the rubber stopper expands
and seals the tank opening. Do not overtighten the assembly as this could cause the tank
to split.
5) With the stopper assembly in place, the
weighted pick-up should rest away from the
rear of the tank and move freely inside the
tank. e top of the vent tube should rest just
below the top of the tank. It should not touch
the top of the tank.
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ENGINE MOUNT INSTALLATION.
1) Locate the items necessary to install
the engine mount included with your
model.
2) Use four 4x30mm head bolts and four
4mm washers to attach the engine mount
rails to the ewall. Tighten the screws .
Make sure to use threadlock on the screws
to help prevent them from vibrating loose.
8) Use balsa block to hold in place the fuel
tank with C/A glue to secure the fuel tank
inside the fuselage
9) Connect the lines from the tank to the
engine and mu. vent line will connectto the mu and the line from the
clunk tothe carburetor.
Fuel pick up tube. Fuel ll tube.
Ven tube.
DHC-1 CHIPMUNK
Instruction Manual.
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3) Use a drill to drill the four holes in the
engine mount rails.
4mm
4mm
Machine screw M4x30mm
4) On the e wall has the location for the
throttle pushrod tube (pre-drill).
5) Slide the pushrod tube in the ewall
and guide it through the fuel tank mount.
Use medium C/A to glue the tube to the
ewall and the fuel tank mount.
6) Connect the Z-bend in the 450mm
throttle pushrod to the outer hole of the
carburetor arm.
7) Slide the throttle pushrod wire into
the tube. Position the engine between
thmounts. Use four M4x30mm machine
screws to secure the engine to the mount
as shown.
MOUNTING THE ENGINE.
1) Position the engine with the drive
washer (145mm) forward of the ewall
as shown.
145mm
2) Use a pin drill and 4mm drill bit to drill
a small indentation in the mount for the
engine mounting screw.
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8) Reinstall the servo horn by sliding the
connector over the pushrod wire. Center the throttle stick and trim and install
the servo horn perpendiular to the servo
center line.
9) Move the throttle stick to the closed position and move the carburetor to closed.
Use a 2.5mm hex wrench to tighten the
screw that secures the throttle pushrod
wire. Make sure to use threadlock on the
screw so it does not vibrate loose.
Pushrod wire.
DHC-1 CHIPMUNK
Instruction Manual.
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COWLING.
1) Tape the cowl to the fuselage using
low-tack tape.
2) Use a drill and drill bit to drill the holes
for the cowl mounting screws. Make sure
the cowl position is correct before drilling each hole.
M3x10mm
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Because of the size of the cowl, it may be necessary to use a needle valve extension for the
high speed needle valve. Make this out of sufcient length 1.5mm wire and install it into
the end of the needle valve. Secure the wire in
place by tightening the set screw in the side of
the needle valve.
ELECTRIC POWER CONVERSION.
1) Locate the items neccessary to install
the electric power conversion included
with your model.
2) Recommend the items necessary to install the electric power conversion parts
included with your model.
DHC-1 CHIPMUNK
Instruction Manual.
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3) Attach the electric motor box to the
rewall suitable with the cross lines
drawn on the electric motor box and rewall. Using M4x25mm to secure the motor box to the rewall. Please see pictures
below.
4) Attach the motor to the front of the
electric motor box using four 4mm blind
nut, four M4x20mm hex head bolts to secure the motor. Please see picture shown.
M4x25mm and washers.
en, use 5.5mm drill bit to enlarge the
holes on the electric motor box.
Blind nut.
You follow the same pattern on page 18
to drill hole mounted motor.
- Motor: 110 - 2000 Watts
- Propeller: 17x8 ~ 19x10
- ESC: 85A
- 8S- 9S Lipo
5.5mm
5mm
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M4x20mm
145mm
Ep ox y.
Balsa stick.
5) Attach the speed control to the side
of the motor box using two-sided tape
and tie wraps. Connect the appropriate
leads from the speed control to the motor. Make sure the leads will not interfere
with the operation of the motor.
Battery.
DHC-1 CHIPMUNK
Instruction Manual.
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INSTALLING THE SPINNER.
Install the spinner backplate, propeller
and spinner cone.
e 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.
INSTALLING THE HORIZONTAL
STABILIZER.
1) Using a ruler and a pen, locate the centerline of the horizontal stabilizer, at the
trailing edge, and place a mark. Use a triangle and extend this mark, from back to
front, across the top of the stabilizer. Also
extend this mark down the back of the
trailing edge of the stabilizer.
2) Using a modeling knife, carefully remove the covering at mounting slot of
horizontal stabilizer ( both side of fuselage).
Cut.
3) Slide the stabilizer into place in the
precut slot in the rear of the fuselage. e
stabilizer should be pushed rmly against
the front of the slot.
M6x60mm
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INSTALLING THE ELEVATORS.
Glue the elevator hinges in place using
the same techniques used to hinge the ailerons.
4) With the stabilizer held rmly 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 le sides and top and
bottom of the stabilizer.
Pen.
5) Remove the stabilizer. Using the lines
you just drew as a guide, carefully remove
the covering from between them using a
modeling knife.
When cutting through the covering to
remove it, cut with only enough pressure to
only cut through the covering itself. Cutting
into the balsa structure may weaken it.
6) Using a modeling knife, carefully remove the covering that overlaps the stabilizer mounting platform sides in the fuselage.
Remove the covering from both the top and
the bottom of the platform sides.
Trim and Cut
7) When you are sure that everything is
aligned correctly, mix up a generous amount
of 30 Minute Epoxy. Apply a thin layer to the
top and bottom of the stabilizer mounting
area and to the stabilizer mounting platform
sides in the fuselage. Slide the stabilizer in
place and realign. Double check all of your
measurements once more before the epoxy
cures. Hold the stabilizer in place with T-pins
or masking tape and remove any excess epoxy
using a paper towel and rubbing alcohol.
Fill Epoxy.
DHC-1 CHIPMUNK
Instruction Manual.
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INSTALLING VERTICAL STABILIZER
INSTALL ELEVATOR CONTROL HORN.
Fiberglass control horn
Ep ox y.
Ep ox y.
1) While holding the vertical stabilizer
rmly in place, use a pen and draw a
line on each side of the vertical stabilizer
where it meets the top of the fuselage.
90º
Vertical
Stabilizer.
Horizontal
Stabilizer.
FillE poxy.
2) Slide the vertical stabilizer back in place.
Using a triangle, check to ensure that the vertical stabilizer is aligned 90º to the horizontal
stabilizer.
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C/A glue..
3) When you are sure that everything
is aligned correctly, mix up a generous amount of Flash 30 Minute Epoxy.
Apply a thin layer to the mounting slot
and to bottom of the vertical stabilizer
mounting area. Apply epoxy to the bottom and top edges of the ller block and
to the lower hinge also. Set the stabilizer
in place and realign. Double check all of
your measurements once more before the
epoxy cures. Hold the stabilizer in place
with T-pins or masking tape and remove
any excess epoxy using a paper towel and
rubbing alcohol. Allow the epoxy to fully
cure before proceeding.
MOUNTING THE TAIL WHEEL.
Locate items necessary to install tail wheel.
3x15mm
DHC-1 CHIPMUNK
Instruction Manual.
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HINGING THE RUDDER.
Glue the top two rudder hinges in place
using the same techniques used to hinge
the ailerons.
INSTALL RUDDER CONTROL HORN.
Ep ox y.
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1) Install the elevator control horn using
the same method as with the aileron control horns.
2) Position the elevator control horn on
the both side of elevator.
Elevator control horn.
Control horn.
Metal clevis.
Elevator pushrod.
Elevator control horn.
3) read one clevis and M2 lock nut on
to each elevator control rod. read the
horns on until they are ush with the
ends of the control rods.
4) Elevator and rudder pushrods assembly as pictures below.
ELEVATOR PUSHROD HORN
INSTALLATION.
Ep ox y.
Elevator pushrod.
M2 lock nut.
DHC-1 CHIPMUNK
Instruction Manual.
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INSTALLATION PILOT AND CANOPY.
RUDDER PUSHROD HORN
INSTALLATION.
Control horn.
Metal clevis.
M2 lock nut.
Wire keeper.
Elevator pushrod.
1) Locate items necessary to install pilot
and canopy.
2) A scale pilot is included with this ARF.
e Pilot included tting well to the cockpit. (or you can order others scale pilot
gures made by SG Models. ey are
available at SG Models distributors.)
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INSTALLING THE BATTERY-RECEVER.
4) Epoxy canopy onto the fuselage. Trace
around the canopy and onto the fuselage
using a epoxy.
If you are going to install a pilot gure,
please use a sanding bar to sand the base
of the gure so that it is at.
3) Position the pilot gure on the canopy
oor as show. Locate the oval shaped on
the canopy oor and remove the covering. Use epoxy to glue this into the base of
the pilot gure and glue the cockpit panel
in place with C/A glue, please see pictures
as shown.
1) Plug the servos leads and the switch
lead into the receiver. Plug the battery
pack lead into the switch also.
2) Wrap the receiver and battery pack in
the protective foam rubber to protect
them from vibration.
Ep ox y.
3) Route the antenna in the antenna tube
inside the fuselage and secure it to the
bottom of fuselage using a plastic tape.
Attach the aluminium tube into fuselage.
ATTACKMENT WING-FUSELAGE.
Ep ox y.
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Instruction Manual.
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Insert two wing panels as pictures below.
4x20mm
Wing tube.
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2) If all the decals are not precut, please
use scissors or a sharp hobby knife to cut
the decals from the sheet. Please be certain the model is clean and free from oily
ngerprints and dust. Position decal on
the model where desired, using the photos on the box and aid in their location.
1) If all the decals are precut and ready to
stick. Please be certain the model is clean
and free from oily ngerprints and dust.
Position decal on the model where desired, using the photos on the box and aid
in their location.
APPLY THE DECALS.
BALANCING.
1) It is critical that your airplane be
balanced correctly. Improper balance will
cause your plane to lose control and
crash. THE CENTER OF GRAVITY IS LOCATED 100MM BACK
FROM THE LEADING EDGE OF
THE WING AT THE WING ROOT.
2) Mount the wing to the fuselage. Place
a piece of masking tape on the top of
each wing 100mm back from the leading
edge at the wing root.
3) With the model inverted, place your
ngers on the masking tape and carefully
li the plane. is is the point at which
your model should balance for your rst
ights. Later, you may wish to experiment
by shiing the balance up to 10mm
forward or back to change the ying characteristics. Moving the balance forward
may improve the smoothness and arrow- like tracking, but it may then require
more speed for take o and make it
more dicult to slow down for landing.
Moving the balance a makes the model
more agile with a lighter and snappier
”feel”. In any case, please start at the location we recommend.
With the wing attached to the fuselage,
all parts of the model installed ( ready to
y), and empty fuel tanks, hold the model at the marked balance point with the
stabilizer level.
*If possible, rst attempt to balance the
model by changing the position of the
receiver battery and receiver. If you are
unable to obtain good balance by doing
so, then it will be necessary to add weight
to the nose or tail to achieve the
proper balance point.
Li the model. If the tail drops when
you li, the model is “tail heavy” and you
must add weight* to the nose. If the nose
drops, it is “nose heavy” and you must
add weight* to the tail to balance.
DHC-1 CHIPMUNK
Instruction Manual.
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CONTROL THROWS.
Ailerons:
High Rate :
Up : 20 mm
Down : 20 mm
Low Rate :
Up : 15 mm
Down : 15 mm
Elevator:
High Rate :
Up : 15 mm
Down : 15 mm
Low Rate :
Up : 12 mm
Down : 12 mm
Rudder:
High Rate :
Right : 30 mm
Le : 30 mm
Low Rate :
Right : 20 mm
Le : 20 mm
Flap:
Mid : 35mm
Full : 25mm
130mm
12-15mm
15-20mm
15-20mm
12-15mm
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FLIGHT PREPARATION. PREFLIGHT CHECK.
Check the operation and direction of the
elevator, rudder, ailerons and throttle.
A) Plug in your radio system per the
manufacturer’s instructions and turn everything on.
B) Check the elevator rst. Pull back
on the elevator stick. e elevator halves
should move up. If it they do not, ip the
servo reversing switch on your transmitter to change the direction.
C) Check the rudder. Looking from behind the airplane, move the rudder stick
to the right. e rudder should move
to the right. If it does not, ip the servo
reversing switch on your transmitter to
change the direction.
D) Check the throttle. Moving the
throttle stick forward should open the
carburetor barrel. If it does not, ip the
servo reversing switch on your transmitter to change the direction.
E) From behind the airplane, look at the
aileron on the right wing half. Move the
aileron stick to the right. e right aileron should move up and the other aileron
should move down. If it does not, ip the
servo reversing switch on your transmitter to change the direction.
1) Completely charge your transmitter and receiver batteries before your rst
day of ying.
2) Check every bolt and every glue joint
in the DHC-1 CHIPMUNK to ensure
that everything is tight and well bonded.
3) Double check the balance of the airplane. Do this with the fuel tank empty.
4) Check the control surfaces. All
should move in the correct direction and
not bind in any way.
5) If your radio transmitter is equipped
with dual rate switches double check that
they are on the low rate setting for your
rst few ights.
6) Check to ensure the control surfaces are moving the proper amount
for both low and high rate settings.
7) Check the receiver antenna. It should
be fully extended and not coiled up inside the fuselage.
We wish you many safe and enjoyable ights
with your DHC-1 CHIPMUNK.
8) Properly balance the propeller. An
out of balance propeller will cause excessive vibration which could lead to engine
and/or airframe failure.
DHC-1 CHIPMUNK
Instruction Manual.
34
If you have any queries, or are interested in our products,
please feel free to contact us
Factory : 12/101A - Hamlet 4 - Le Van Khuong Street - Dong anh Ward -
Hoc Mon District - Ho Chi Minh City - Viet Nam.
Oce : 62/8 Ngo Tat To Street - Ward 19 - Binh anh District - Ho Chi Minh
City - Viet Nam
Phone : 848 - 86622289 or 848- 36018777
Website : www.SeagullModels.com
Email : Sales@seagullmodels.com
Facebook : www.facebook.com/SeaGullModels.
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