Seagull Models De Havilland DH-60M Moth 72" wingspan... User manual

“Graphics and specifications may change without notice”.
MS:169N
ASSEMBLY MANUAL
Specifications:
Wingspan------------------66.9in---------------170cm.
Wingarea-----------------764.2sq.in--------49.3sqdm.
Weight---------------------11.7lbs--------------5.3kg.
Length----------------------58.7in---------------149.0cm.
Engine ----------------------15-20cc.
Engine ---------------------- 0.91-1.10cu.in----4-stroke.
Radio-----------------------4channelswith6 servos.
Electricconversion:optional
Flyingskilllevel Advanced/Intermediate.
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De Havilland DH-60M Moth 72"wingspan,15cc Instruction Manual.
2
INTRODUCTION.
Thank you for choosing the De Havilland DH-60M Moth 72"wingspan,15cc ARTF by SG
De Havilland DH-60M Moth 72"wingspan,15cc was designed with the
intermediate/advancedsportflyerinmind.Itisa semiscale airplane whichis easy to fly and quick
toassemble.Theairframeisconventionallybuiltusingbalsa, plywoodto make it stronger than the
averageARTF, yetthedesignallowstheaeroplanetobekept light. You will find that most of the
work has been done for you already.The motor mount has been fitted and the hinges are pre-installed.
Flying the De Havilland DH-60M Moth 72 "wingspan,15cc 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 De Havilland DH-60M Moth 72"wingspan,15cc
Use the parts listing below to identifyall 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
proceduresdesignedtohelpthenewpilotonhiswaytosuccessful R/C flight. They willalsobeable
to advise on any insurance and safety regulations that may apply.
KIT CONTENTS.
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2
11
9
8
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MODELS. The

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ADDITIONAL ITEMS REQUIRED.
15-20cc.
0.91 - 1.10 4---stroke.
Computer radio 4 channels with 6
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.
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.
Thread-lock.
Paper towels.
KIT CONTENTS.
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.
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 aileron
until the T-pin is snug against the aileron. This
will help ensure an equal amount of hinge is
on either side of the hinge line when the aileron
is mounted to the wing panel.
Note:
1) Carefully remove the aileron from one
of the wing panels. Note the position of the
hinges.
HINGING THE 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
should be maintained between the wing panel
and aileron.
Hinge.
T-pin.
1 Fuselage
2 Upper Wing Set
3 Lower Wing Set
4 Tail Set
5 Cowling
6 Main Landing Gear
7 Wing Tube
8 Strut Fuselage
9 Strut Wing
10 Wheels
11 Transport frames
12 Hardware Set

4
8) After both ailerons are securely 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.
Worktheaileron up and down several
times to “work in” the hinges and
check for proper movement.
Note:
HINGING THE ELEVATOR.
Glue the rudder hinges in place using the
same techniques used to hinge the ailerons.
4) Deflect the aileron and completely
saturate each hinge with thin C/A glue. The
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.
Thehingeis 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.
Note:
Hinge.
C/A glue.
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.
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, making sure that the C/A penetrates into
both the aileron and wing panel.
7) Repeat this process with the other wing
panel, securely hinging the aileron in place.
Instruction Manual.
De Havilland DH-60M Moth 72"wingspan,15cc

5
Aileron control horn.
INSTALL THE AILERONS CONTROL
HORN.
1) Locate the hardware necessary to install
the control horns for the ailerons.
HINGING THE RUDDER.
Glue the rudder hinges in place using the
same techniques used to hinge the ailerons.
Hinge.
Fiberglass control horn.
2) Position the Control horn on the Aileron
and use 30-minute Epoxy
Elevator control horn.
Install the elevator control horn using the
same method as same as the aileron control
horns.
INSTALL ELEVATOR CONTROL HORN.
Fiberglass control horn.
Position the Control horn on the Aileron and
use 30-minute Epoxy
INSTALL RUDDER CONTROL HORN.
Repeat steps to install the rudder control horn
as same as steps done for ailerons.
Fiberglass control horn.
Epoxy.
Epoxy.

6
Thread locker glue.
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) 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.
ENGINE MOUNT INSTALLATION.
Rudder control horn.
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 firewall. Tighten the screws . Make sure to
use threadlock on the screws to help prevent
them from vibrating loose.
4x30mm.
Instruction Manual.
Epoxy.
De Havilland DH-60M Moth 72"wingspan,15cc

7
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. 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.
Vent tube. Fuel pick up tube.
Fuel fill tube.
3) Carefully bend the second nylon tube
up at a 45º angle. This tube is the vent tube.
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.
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
thetank isinstalled inside the fuselage, itmay
be difficult to determine which is which.
FUEL TANK INSTALLATION.
 7) Slide the fuel tank into the fuselage. Guide
the lines from the tank through the hole in the
firewall.
Fuel tank.
 8) Use plywood template to hold in place
the fuel tank with C/A glue to secure the fuel
tank inside the fuselage.
Vent tube.
Fuel pick up tube.
Fuel fill tube.
9) 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.
C/A glue.
M3x10mm.

8
2) Use a pin drill and 4mm drill bit to drill a
small indentation in the mount for the engine
mounting screw.
Adjustable Servo
connector.
Servo arm.
Loctite secure.
1 PCS.
Throttle servo arm.Elevator servo arm.
Rudder servo arm.
3/ 32” Hole.
INSTALLING THE SWITCH.
Install the switch into the precut hole in the
side, in the fuselage.
Switch.
Trim and cut.
140mm.
MOUNTING THE ENGINE.
 1) Position the engine with the drive washer
(140mm) forward of the firewall as shown.
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.
INSTALLING THE FUSELAGE SERVOS.
Throttle servo.
Elevator servo.
Rudder servo.
1) Install the rubber grommets and brass
collets onto the throttle servo. Test fit the servo
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
mayneedtoadjustthe size oftheprecutopen-
ing in the mount. The notch in the sides of the
mount allow the servo lead to pass through.
THROTTLE SERVO ARM INSTALLATION.
Install adjustable servo connector in the servo
arm as same as picture below:
Elevator servo.
Elevator servo arm.
Instruction Manual.
De Havilland DH-60M Moth 72"wingspan,15cc

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3) Use a drill to drill the four holes in the engine
mount rails.
4) On the fire wall has the location for the
throttle pusshrod tube (pre-drill).
4.5mm.
4mm.
8) Reinstall the servo horn by sliding the
connector over the pushrod wire. Center the
throttle stick and trim and install the servo horn
perpendicular to the servo center line.
Machine screw M4x30mm.
Pushrod wire.
7) Slide the throttle pushrod wire into the tube.
Position the engine between the mounts. Use
four M4x30mm machine screws to secure the
engine to the mount as shown.
5) Slide the pushrod tube in the firewall and
guide it through the fuel tank mount. Use
medium C/A to glue the tube to the firewall and
the fuel tank mount.
6) Connect the Z-bend in the 450mm throttle
pushrod to the outer hole of the carburetor arm.
Pushrod tube hole.
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.

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1) Locate the items neccessary to install
the wheel and wheel pants to the landing gear
as shown.
WHEEL AND WHEEL PANTS
INSTALLATION.
2) Attach the Landing gear struts to the
fuselage.
3) Install the wheel.
M4x20mm.
A.
A.
B.
M4x20mm.
D.
D.
C.
B.
M3x10mm.
M3x10mm.
D.
Instruction Manual.
De Havilland DH-60M Moth 72"wingspan,15cc

M3x4mm.
11

Instruction Manual.
12
De Havilland DH-60M Moth 72"wingspan,15cc
M4x10mm.
C.

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Trim and cut.
Trim and cut.
COWLING.
Trim and cut.
1) Slide the fiberglass cowl over the engine
and line up the back edge of the cowl with the
marks you made on the fuselage then trim and
cut as shown.
Becauseof the size of thecowl, itmay benec-
essaryto usea needle valve extension forthe
highspeedneedle valve. Makethis out ofsuf-
ficient length 1.5mm wire and install it into the
end of the needle valve. Secure the wire in
placeby tighteningthe setscrew in the side of
the needle valve.
Machine screw M3x10mm.
2) While keeping the back edge of the
cowl flush with the marks, align the front of
the cowl with the crankshaft of the engine. The
front of the cowl should be positioned so the
crankshaft is in nearly the middle of the cowl
opening. Use the spinner backplate as a guide.
Hold the cowl firmly in place using pieces of
masking tape.

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 3) Install the muffler and muffler extension
onto the engine and make the cutout in the
cowl for muffler clearance. Connect the fuel
and pressure lines to the carburetor, muffler
and fuel filler valve. Secure the cowl to fuse-
lage using the M3x10mm screws.
ELECTRIC POWER CONVERSION.
1) Locate the items neccessary to install the
electric power conversion included with your
model.
2) Attach the electric motor box to the firewall
suitable with the cross lines drawn on the electric
motor box and firewall. Using epoxy and balsa
stick to secure the motor box to the firewall.
Please see pictures below.
Recommendation EP parts as shown (not
included with your model)
3) Attach the motor to the front of the electric
motor box using four 4mm blind nut, four
M3x15mm hex head bolts to secure the motor.
Please see picture shown.
M4 x 20mm.
4mm.
Instruction Manual.
De Havilland DH-60M Moth 72"wingspan,15cc
- Motor: 1800 - 2000 Watts
- Propeller: 17x8 ~ 19x10
- ESC: 85A
- Lipo Batteries: 8S -9S

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4mm.
Blind nut.
140mm.
Battery.
Balsa stick.
Electric motor.
Speed control.
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.
Epoxy.
M3x15mm.
Epoxy.

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INSTALLING THE PROPELLER.
INSTALLING THE AILERON - FLAP SERVOS.
Servos. Small weight.
Thread.
1) Using a small weight (Weighted fuelpick-up
workswell) and string, feed the string through
the wing as indicated.
Because the size of servos differ, you
mayneedtoadjustthesizeoftheprecutopen-
ing in the mount. The notch in the sides of
themountallowtheservoleadtopassthrough.
2) 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.
3) Use drill bit in a pin vise to drill the mouting
holes in the blocks.
4) Apply 2-3 drops of thin C/A to each of the
mounting holes. Allow the C/A to cure without
using accelerator.
Instruction Manual.
De Havilland DH-60M Moth 72"wingspan,15cc

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6) Secure the servo to the aileron hatch using
Phillips screwdriver and the screws provided
with the servo.
5) Use dental floss to secure the connection
so they cannot become unplugged.
7) Apply 1-2 drops of thin C/A to each of the
mounting tabs. Allow the C/A to cure without
using accelerator.
8) Using the thread as a guide and using
masking tape, tape the servo lead to the end
of the thread: carefully pull the thread out. When
you have pulled the servo lead out, remove the
masking tape and the servo lead from the
thread.
9) Set the aileron hatch in place and use a
Phillips screw driver to install it with four wood
screws.

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Wing. M3 lock nut.
M3 lock nut.
M3 clevis.
50mm.
80mm.
Aileron.
AILERON PUSHROD HORN INSTALLATION.
INSTALLING THE HORIZONTAL STABILIZER.
1) Using a ruler and a pen, locate the
centerline of the horizontal stabilizer, at the trail-
ing 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.
Instruction Manual.
 4) With the stabilizer held firmly 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 left sides and top and
bottom of the stabilizer.
 3) Slide the stabilizer into place in the pre-
cut slot in the rear of the fuselage. The stabi-
lizer should be pushed firmly against the front
of the slot.
Draw center line.
2) Using a modeling knife, carefully remove
the covering at mounting slot of horizontal sta-
bilizer ( both side of fuselage).
Cut.
De Havilland DH-60M Moth 72"wingspan,15cc

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When cutting through the covering to re-
move it, cut with only enough pressure to
only cut through the covering itself. Cutting
into the balsa structure may weaken it.
Pen.
 5) Remove the stabilizer. Using the lines
you just drew as a guide, carefully remove the
covering from between them using a model-
ing knife.
 6) Using a modeling knife, carefully re-
move the covering that overlaps the stabilizer
mounting platform sides in the fuselage. Re-
move the covering from both the top and the
bottom of the platform sides.
 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 mea-
surements once more before the epoxy cures.
Hold the stabilizer in place with T-pins or mask-
ing tape and remove any excess epoxy using
a paper towel and rubbing alcohol.
Fill epoxy.
Fill epoxy.
2) While holding the vertical stabilizer
firmly in place, use a pen and draw a line on
each side of the vertical stabilizer where it
meets the top of the fuselage.
INSTALLING VERITICAL FIN.
1) Using a modeling knife, remove the
covering from over the precut hinge slot cut
into the lower rear portion of the fuselage.
Remove covering.
Fill epoxy.
Trim and cut.

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Fill epoxy.
90º
Vertical
Stabilizer.
Horizontal
Stabilizer.
Epoxy.
3) Slide the vertical stabilizer back in
place. Using a triangle, check to ensure that
the vertical stabilizer is aligned 90º to the hori-
zontal stabilizer.
Hinge.
Epoxy.
Instruction Manual.
ELEVATOR - RUDDER PUSHROD HORN
INSTALLATION.
 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.
4) 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 sta-
bilizer mounting area. Apply epoxy to the bot-
tom and top edges of the filler block and to the
lower hinge also. Set the stabilizer in place
and realign. Double check all of your measure-
ments 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 ep-
oxy to fully cure before proceeding.
Rudder control horn.
Elevator control horn.
Rudder control horn.
Elevator control horn.
De Havilland DH-60M Moth 72"wingspan,15cc