Seagull Models Husky Assembly Manual



ASSEMBLY MANUAL

“Graphics and specifications may change without notice”.

MS:180

Specifications:

Wing span ------------------------------79.9in (203cm).
Wing area -----------------922.3sq.in (59.5sq dm).
Weight ------------------------7.9-8.8lbs (3.6-4.0kg).
Length ------------------------------50.0in (127.0cm).
Engine ------------------ 0.61-0.75cu.in -----2-stroke.

0.91.in -----4-stroke.
Radio ------------------- 5 channels with 7 servos.
Electric conversion: optional

CHRISTEN HUSKY Instruction Manual.

INTRODUCTION.

Thank you for choosing the CHRISTEN HUSKY ARTF by SEAGULL MODELS COMPANY LTD.
The CHRISTEN HUSKY was designed with the intermediate/advanced sport flyer in mind. It is a
semi scale airplane which is easy 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 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 CHRISTEN HUSKY 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 CHRISTEN HUSKY . 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.

If you are inexperienced with basic R/C flight we strongly recommend you contact your R/C supplier
and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training
procedures designed to help the new pilot on his way to successful R/C flight. They will also be able
to advise on any insurance and safety regulations that may apply.

KIT CONTENTS

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KIT CONTENTS.TS

SEA180 CHRISTEN HUSKY 2030mm

SEA18001 Fuselage
SEA18002 Wing set
SEA18003 Tail set
SEA18004 Cowling :
SEA18005 Main Landing Gear
SEA18006 Tail Gear
SEA18007 Windshield Set
SEA18008 Decal Set
SEA18009 Linkage Set
SEA18010 Wing Tube
SEA18011 Fiberglass Wheel pants
ZZBSEA180B Replacement Box
FL180 Floating set for Christen Husky

ADDITIONAL ITEMS REQUIRED.

HINGING THE FLAP

 0.61- 0.75 2-stroke.

0.91 4-stroke.

 Computer radio with 7 servos.
 Glow plug to suit engine.
 Propeller to suit engine.
 Protective foam rubber for radio

system.

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.

M2x10mm.

M2x10mm.

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CHRISTEN HUSKY Instruction Manual.

3) Remove each hinge from the horizontal
stabilizer panel and elevator and place a T­pin in the center of each hunge. Slide each
hinge into the elevator until the T-pin is snug
against the elevator. This will help ensure an
equal amount of hinge is on either side of the
hinge line when the elevator is mounted to
the horizontal stabilizer panel.

Epoxy

HINGING THE ELEVATORS

1)Locate the items for this section of the
manual.

2)Carefully remove the elevator from one of
the horizontal stabilizer panels. Note the
position of the hinges. Used C/A glue to fix the
hinges position..

Epoxy

C/A glue

C/A glue

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HINGING THE RUDDER

Glue the rudder hinges in place using the
same techniques used to hinge the ailerons.

INSTALL THE .

Epoxy

Fiberglass

INSTALL THE AILERONS CONTROL

HORN.

Fiberglass control horn.

Epoxy

Epoxy

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CHRISTEN HUSKY Instruction Manual.

INSTALL ELEVATOR CONTROL

Aileron control horn.

Epoxy

Fiberglass control horn.

HORN.

INSTALL FLAP CONTROL HORN.

Install the flap control horn using the same
method as same as the aileron control horns.

Fiberglass control horn.

Flap control horn.

Epoxy

Epoxy

INSTALL RUDDER CONTROL HORN.

Repeat steps to install the rudder control horn
as same as steps done for ailerons.

Fiberglass control horn.

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wheel collar.

Epoxy

Rudder control horn.

Epoxy.

Washer.

wheel Pant.

C/A glue.

Axle.

Washer.

nut.

M3.

wheel.

wheel.

wheel collar.

M3.

M3.

Axle.

M3.

WHEEL AND WHEEL PANTS.

1)Assembling and muonting the wheel pants
as shown below pictures.

Axle

INSTALLING THE MAIN LANDING

GEAR TO FUSELAGE.

Wheel collar.

M4x20mm

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CHRISTEN HUSKY Instruction Manual.

Thread locker glue

M4x20mm

Locker glue.

M4x20mm

M4x20mm

INSTALLING WHEEL PANTS TO

MAIN LADING GEAR.

Landing Gear.

C/A glue.

wheel Pant.

ENGINE MOUNT INSTALLATION.

1) Locate the items necessary to install the
engine mount included with your model. .

4x30mm.

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.

Thread locker glue.

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INSTALLING THE STOPPER ASSEMBLY.

 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.

 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.

Vent 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.

 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.

Fuel pick up tube.

 6) When satisfied 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.

FUEL TANK INSTALLATION.

C

You should mark which tube is the vent

A

B

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 difficult to determine which
is which.

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CHRISTEN HUSKY Instruction Manual.

A

C/A glue.



7) Slide the fuel tank into the fuselage. Guide
the lines from the tank through the hole in the
firewall.

 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.

Fuel tank.

C

Blow through one of the lines to en­sure the fuel lines have not become kinked
inside the fuel tank compartment. Air
should flow through easily.

INSTALLING THE FUSELAGE SERVOS.

Because the size of servos differ, you
may need to adjust the size of the precut open­ing in the mount. The notch in the sides of the
mount allow the servo lead to pass through.

 1) Install the rubber grommets and brass
collets onto the throttle servo. Test fit the servo
into the aileron servo mount.

C/A glue.

 2) Secure the servos with the screws pro­vided with your radio system.

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INSTALLING THE SWITCH.

Throttle servo.

THROTTLE SERVO ARM INSTALLATION.

Install adjustable servo connector in the servo
arm as same as picture below:

Loctite secure.

Adjustable Servo
connector.

Servo arm.

Install the switch into the precut hole in the

side, in the fuselage.

3/ 32” Hole.

Recomend mounting switch inside fuselage if
using floats.

1 PCS.

Cut Covering.

Throttle servo arm.

Switch Installation.

MOUNTING THE ENGINE.

 1) Position the engine with the drive washer
(145mm) forward of the firewall as shown.

3x10 mm

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CHRISTEN HUSKY Instruction Manual.

4) On the fire wall has the location for the
throttle pusshrod tube (pre-drill).

145mm.

2) Use a pin drill and 4mm drill bit to drill a
small indentation in the mount for the engine
mounting screw.

4mm.

3) Use a drill to drill the four holes in the engine
mount rails.

Pushrod tube hole.

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.

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.

Pushrod wire.

Machine screw M4x30mm.

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4.5mm.

Cut.

Machine screw M4x30mm.

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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.

Trim and cut.

Trim and cut.

COWLING.

 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.

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 suf­ficient 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.

 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.

Needle valve.

Trim and cut.

Machine screw M3x10mm.

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CHRISTEN HUSKY Instruction Manual.

- Model size: .75-.90 size models

- Motor: 50mm 310 rev per volt

- Propeller: 14x10 ~ 15x10

- ESC: 60A

- Lipo Batteries: 8 cell 3200mA

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.

 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 fuse­lage using the M3x10mm screws.

ELECTRIC POWER CONVERSION.

1) Locate the items neccessary to install the
electric power conversion included with your
model.

M4x20mm

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.

1) Recommendation EP parts as shown (not
included with your model).

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4mm.

Epoxy.

145mm.

Balsa stick.

Blind nut.

Epoxy.

Electric motor.

4) Locate the plywood battery tray to the
fuselage. Tighten the screws using machine
screws M3x15mm to secure the tray in position.

Battery.

M3x15mm.

Tie wraps.

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CHRISTEN HUSKY Instruction Manual.

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.

Recomend Mounting Speed Control inside
Fuselage If Flying off Water.

Speed control.

M3x15mm.

INSTALLING THE SPINNER.

INSTALLING THE AILERON - FLAP SERVOS.

Servos.

Small weight.

Install the spinner backplate, propeller and
spinner cone.

The 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.

Thread.

Because the size of servos differ, you
may need to adjust the size of the precut open­ing in the mount. The notch in the sides of
the mount allow the servo lead to pass through.

1) Using a small weight (

works well) and string, feed the string through

Weighted fuel pick-up

the wing as indicated.

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.

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3) Use drill bit in a pin vise to drill the mouting
holes in the blocks.

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4) Apply 2-3 drops of thin C/A to each of the
mounting holes. Allow the C/A to cure without
using accelerator.

C/A glue.

8) A string has been provided in the wing to
pull the aileron lead through to the wing root.
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.

C/A glue.

5) Use dental floss to secure the connection
so they cannot become unplugged.

6) Secure the servo to the aileron hatch using
Phillips screwdriver and the screws provided
with the servo.

7) Apply 1-2 drops of thin C/A to each of the
mounting tabs. Allow the C/A to cure without
using accelerator.

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CHRISTEN HUSKY Instruction Manual.

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9) Set the aileron hatch in place and use a
Phillips screw driver to install it with four wood
screws.

Wing.

M2 lock nut.

Aileron.

INSTALLING THE FLAP SERVO

Repeat the procedure for the aileron servo.

50 mm

M2 clevis.

M2 lock nut.

M2x10mm

AILERON PUSHROD HORN INSTALLATION

60mm.

M2 clevis.

M2 lock nut.

Wing.

M2 lock nut.

Flag.

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CHRISTEN HUSKY Instruction Manual.

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.

Draw center line.

 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.

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.

 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. The stabi­lizer should be pushed firmly against the front
of the slot.

Trim and cut.

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.

 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.

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Epoxy.

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 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.

Remove covering.

Epoxy.

Epoxy.

INSTALLING VERITICAL STABILIZER.

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.

Epoxy.

3) Slide the vertical stabilizer back in
place. Using a triangle, check to ensure that
the vertical stabilizer is aligned 90º to the hori­zontal stabilizer.

 1) Using a modeling knife, remove the
covering from over the precut hinge slot cut
into the lower rear portion of the fuselage.

Horizontal

Stabilizer.

Vertical

90º

Stabilizer.

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CHRISTEN HUSKY Instruction Manual.

Rudder control horn.

Epoxy.

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 sta­bilizer mounting area. Apply epoxy to the bot­tom 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 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.

M2 clevis.

Crimp.

Cable end.

M2 lock nut.

600mm.

Metal connector.

M3 Clevis.

ELEVATOR AND RUDDER PUSHROD

HORN

INSTALLATION.

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INSTALLATION TAILWHEEL.

1) Locate the items for this section of the
manual.

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CHRISTEN HUSKY Instruction Manual.

3x25 mm.

Aluminum tail
landing gear.

2) A scale pilot is included with this ARF. The
Seagull Pilot included fitting well to the cockpit.

3 x 20mm.

(or you can order others scale pilot figures
made by Seagull factory. They are available at
Seagull distributors.)

If you are going to install a pilot figure, please
use a sanding bar to sand the base of the figure
so that it is flat.

INSTALLATION PILOT AND CANOPY.

1) Locate items necessary to install pilot, seats
.

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Epoxy

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Receiver.

Epoxy

Battery.

APPLY THE DECALS.

1) If all the decals are precut and ready to
stick. Please be certain the model is clean and
free from oily fingerprints and dust. Position
decal on the model where desired, using the
photos on the box and aid in their location.

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 fingerprints
and dust. Position decal on the model where
desired, using the photos on the box and aid
in their location.

INSTALLING BATTERY-RECEIVER.

 1) Plug the five servo leads and the switch
lead into the receiver. Plug the battery pack
lead into the switch also.

ATTACHMENT WING- FUSELAGE.

Attach the aluminium tube into fuselage.

Wing tube.

 2) Wrap the receiver and battery pack in
the protective foam rubber to protect them
from vibration.



3) Route the antenna in the antenna tube

inside the fuselage and secure it to the bot­tom of fuselage using a plastic tape.

Recomend Wrapping Receiver in Plastic Bag
or Baloon if flying off water.

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CHRISTEN HUSKY Instruction Manual.

Epoxy.

M3x15mm.

2

M4x20mm.

M4x12mm.

INSTALLATION STRUT

WING-FUSELAGE.

Screw.

M3x15mm.

1

Screw.

1

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OPTIONAL FLOAT FOR HUSKY.

 Install Structs onto floats

Screw.

1

4

3

2

M3x15mm.

2

1

3

3

4 x 20 mm

3

1

2

4 x20mm

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CHRISTEN HUSKY Instruction Manual.

Screw

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3 x 10mm

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M2 clevis.

600mm.

M2 lock nut.

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CHRISTEN HUSKY Instruction Manual.

C/A glue

4 x 20mm

4 x 20mm

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
60 MM BACK FROM THE LEADING EDGE
OF THE WING AT THE WING ROOT.

 2) Mount the wing to the fuselage. Using a

couple of pieces of masking tape, place them
on the bottom side of the wing
from the leading edge of the wing at the wing
root.

60=mm back

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 3) With the model upright, place your
fingers on the masking tape and carefully lift
the plane.

1 4) Do not turn plane upside down. Only low
wing models should be turned upsidedown for
balancing. Remove this paragraph, it is not
intended for use in the instructions. it is a note
for you.High Wing models must be balanced
upright.

Accurately mark the balance point on the
botttom of the wing on both sides of the
fuselage. The balance point is located
back from the leading edge of the wing at the
wing root. This is the balance point at which
your model should balance for your first flights.
Later, you may wish to experiment by shifting
the balance up to 10mm forward or back to
change the flying characteristics. Moving the
balance forward may improve the
smoothness and arrow- like tracking, but it
may then require more speed for take off and
make it more difficult to slow down for landing.
Moving the balance aft makes the model more
agile with a lighter and snappier ”feel”. In any
case,please start at the location we
recommend .

60 mm

With the wing attached to the fuselage, all
parts of the model installed ( ready to fly), and
empty fuel tanks, hold the model at the marked
balance point with the stabilizer level.

Lift the model. If the tail drops when you lift,
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.

*If possible, first 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.

80mm.

CONTROL THROWS.

Ailerons: 12mm - 15mm up
12mm - 15mm down.

Elevator: 12mm - 15mm up.
12mm - 15mm down.

Rudder: 20mm - 30mm left.
20mm - 30mm right.

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CHRISTEN HUSKY Instruction Manual.

FLIGHT PREPARATION.

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 first. Pull back
on the elevator stick. The elevator halves
should move up. If it they do not, flip 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. The rudder should move to the right.
If it does not, flip 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, flip the servo re­versing switch on your transmitter to change
the direction.

PREFLIGHT CHECK.

 1) Completely charge your transmitter
and receiver batteries before your first day of
flying.

 2) Check every bolt and every glue joint
in the CHRISTEN HUSKY to ensure that ev-
erything 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 first few
flights.

 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.

 E) From behind the airplane, look at
the aileron on the right wing half. Move the
aileron stick to the right. The right aileron
should move up and the other aileron should
move down. If it does not, flip the servo re­versing switch on your transmitter to change
the direction.

We wish you many safe and enjoyable flights

with your CHRISTEN HUSKY.

 8) Properly balance the propeller. An out
of balance propeller will cause excessive vi­bration which could lead to engine and/or air­frame failure.

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