Seagull Models Funfly 3D User manual

“Graphics and specifications may change without notice”.
MS:40
ASSEMBLY MANUAL
Specifications:
Wingspan----------------------------50.4in(128cm).
Wingarea-----------------840.1sq.in(54.2sqdm).
Weight-----------------------5.1-5.7lbs(2.3-2.6kg).
Length---------------------------------51.6in(131cm).
Engine --------------- 0.46-0.55cu.in----2-stroke.
0.72cu.in ---4-stroke.
Radio--------------------4channelswith6 servos.
Electricconversion:optional

SEAGULL FUNFLY 3D. Instruction Manual.
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INTRODUCTION.
Thankyouforchoosingthe SEAGULLFUNFLY3DARTFbySEAGULLMODELSCOMPANYLTD.
The SEAGULL FUNFLY 3D 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
aeroplanetobekeptlight.Youwillfindthatmostoftheworkhasbeendoneforyoualready.Themotor
mounthasbeenfittedandthehingesarepre-installed.Flyingthe SEAGULLFUNFLY3D issimply
ajoy.
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manual thoroughly before starting assembly of your SEAGULL FUNFLY 3D . Use the parts listing
below to identify all parts.
WARNING.
Please be aware that this aeroplane is not a toy and if it is assembled or used incorrectly it
will cause 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
proceduresdesignedtohelpthe newpilotonhisway tosuccessfulR/Cflight.Theywillalsobe able
to advise on any insurance and safety regulations that may apply.
KIT CONTENTS
1
2
9
3
4
5
8
6
7
10
4
11 12 14 13
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ADDITIONAL ITEMS REQUIRED.
0.46-0.55 2-stroke.
0.72 4-stroke.
Computer radio with 6 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.
Modellingknife.
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.
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)Removeeach hinge fromthewing panel
and aileron and place a T-pin in the center of
each hinge. Slide each hinge into the aileron
untiltheT-pin is snug againsttheaileron.This
will help ensure an equal amount of hinge is
oneithersideofthe hingelinewhen theaileron
is mounted to the wing panel.
HINGING THE AILERONS .
Note:
1) Carefully remove the aileron from one
of the wing panels. Note the position of the
hinges.
Hinge.
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.Agap of 1/64” or less
shouldbemaintainedbetween the wing panel
andaileron.
T-pin.
1 Fuselage
2 Left wing panel
3 Right wing panel
4 Tail set (2)
5 Pilot
6 Aluminum wing tube
7 Fiberglass cowl
8 Canopy
9 Fuel tank
10 Landing gear
11 Fiberglass whl pants
12 Engine mount
13 wheel(2)
14 Hardware bag included
15 EP conversion pack
KIT CONTENS.TS

SEAGULL FUNFLY 3D. Instruction Manual.
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INSTALL THE AILERONS CONTROL
HORN.
1) Locate the hardware necessary to install
the control horns for the ailerons.
8)After both ailerons aresecurelyhinged,
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.
7) Repeat this process with the other wing
panel, securely hinging the aileron in place.
6) Using C/A remover/debonder and a
papertowel,removeany excess C/Agluethat
may have accumulated on the wing or in the
aileronhingearea.
5)Turnthewingpanel over anddeflectthe
aileron in the opposite direction from the
opposite side. Apply thin C/A glue to each
hinge,makingsurethattheC/Apenetrates into
both the aileron and wing panel.
Workthe aileronupanddownseveral
times to “work in” the hinges and
Note:
4) Deflect the aileron and completely
saturate each hinge with thin C/A glue. The
aileronsfrontsurface shouldlightlycontactthe
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 constructedof 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.
HINGING THE RUDDER.
Glue the rudder hinges in place using the
same techniques used to hinge the ailerons.

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2) Position the control horn on the bottom of
the aileron. You will see pre-drill hole 3mm for
the horn mounting screw on the aileron.
2 sets.
3x35mm.
Aileroncontrolhorn.
3) Place epoxy into hole. This will harden the
threads and prevent the crews from pulling
loose.
4) Thread a control horn end with aluminum
washer, lock nut until the top edge of the end is
18mm from the vase of the horn as shown.
3mm.
ALUMINUMWASHER.
ALUMINUMWASHER.
CONTROLHORN
M3 SCREW.
18mm.
Epoxy.
Wing
Wing
Epoxy.
M3LOCKNUT.
3mm.
Install the elevator control horn using the
same method as same as the aileron control
horns.
INSTALL ELEVATOR CONTROL HORN.
2 sets.
3x35mm.
AluminumWasher.
CONTROLHORNM3
M3LOCKNUT.
Epoxy.
AluminumWasher.
Horizontal
Stabilizer. Elevator.

SEAGULL FUNFLY 3D. Instruction Manual.
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Thread locker glue.
ENGINE MOUNT INSTALLATION.
1) Locate the items necessary to install the
engine mount included with your model.
2) Usefour4x30mm headboltsandfour 4mm
washers to attach the engine mount rails to
thefirewall.Tightenthescrews.Makesure to
use threadlock on the screws to help prevent
them from vibrating loose.
4x30mm.
INSTALL RUDDER CONTROL HORN.
Repeat steps to install the rudder control
horn as same as steps done for ailerons.
Elevator control horn.
Rudder.
Aluminum Washer.
CONTROLHORN
M3 SCREW.
M3LOCKNUT.
Epoxy.
Aluminum Washer.
Fuselage.
Fuselage.
18mm.
Epoxy.
Rudder.
Rudder control horn.
18mm.
Epoxy.
Horizontal
Stabilizer. Elevator.

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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) Usingamodelingknife,cut one length
ofsiliconfuelline. Connect one endoftheline
totheweightedfuelpick up and the other end
to the nylon pick up 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.
Venttube. Fuel pick up tube.
Fuel fill tube.
5) With the stopper assembly in place,
the weighted pick-up should rest away from
therear 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.
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
thetankisinstalledinsidethe fuselage, it may
be difficult to determine which is which.
Tie wrap.
Balsa

SEAGULL FUNFLY 3D. Instruction Manual.
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 7) Slide the fuel tank into the fuselage. Guide
the lines from the tank through the hole in the
firewall.
Fueltank.
Epoxy.
Fueltank.
 8) Use plywood template to hold in place
the fuel tank with C/A glue to secure the fuel
tank inside the fuselage.
Venttube.
Fuel pick up tube.
Fuel fill tube.
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.
WheelCollar.
Axle.
Wheel. Nut.
Wheel Pant.
LandingGear.
Nut.
(2)Washer.
Lite-Plywood
block.
1) Assemble and mounting the landing
gear wheels to the wheel pants as shown in
the following pictures.
2) Follow diagram below for wheel pant
installation:
WHEEL AND WHEEL PANTS
INSTALLATION.
7mm
14mm
wheel collar.
wheel.
Axle.
Washer. M3. M3.
Balsawoodinclude.

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C/Aglue.
LandingGear. wheel Pant.
wheel Pant.
wheel.
M3.
M3.
wheel collar.
nut. Axle.
Washer.
3) A drop of C/A glue on the wheel collar
screws will help keep them from coming lose
duringoperation.
Repeat the process for the other wheel.
Lockerglue.
1) The blind nuts for securing the landing
geararealreadymounted inside thefuselage.
2) Usingthehardwareprovided,mountthe
main landing gear to the fuselage.
INSTALLING THEMAINLANDING GEAR.
M4 x 20mm.

SEAGULL FUNFLY 3D. Instruction Manual.
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THROTTLE SERVO ARM INSTALLATION.
Installadjustableservoconnectorinthe servo
arm as same as picture below:
Elevator servo.
Elevator servo arm. Rudder servo arm.
Elevator servo.
Elevator servo. Rudder servo.
1) Installtherubbergrommetsandbrass
colletsonto thethrottleservo. Testfittheservo
into the aileron servo mount.
 2) Secure the servos with the screws pro-
vided with your radio system.
Throttle servo arm.
Throttle servo.
INSTALLING THE FUSELAGE SERVOS.
Because the size of servos differ, you
mayneedto adjustthesize oftheprecut open-
ing in the mount. The notch in the sides of the
mount allow the servo lead to pass through.

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Switch.
3/32” Hole.
INSTALLING THE SWITCH.
Installtheswitchinto the precutholeinthe
side, in the fuselage.
Trim and cut.
INSTALLINGTHEAILERON
Servos. Smallweight.
Thread.
Because the size of servos differ, you
mayneedtoadjustthesizeof theprecutopen-
ing in the mount. The notch in the sides of
themountallowtheservoleadtopassthrough.
Small weight.
String.

SEAGULL FUNFLY 3D. Instruction Manual.
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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).
2mm.
2mm.
Pushrod tube hole.
2) Use a pin drill and 2mm drill bit to drill a
small indentation in the mount for the engine
mounting screw.
MOUNTING THE ENGINE.
 1) Positiontheenginewiththedrivewasher
(110mm) forward of the firewall as shown.
110mm.

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9) Move the throttle stick to the closed position
and move the carburetor to closed. Use a 1.5mm
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.
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.
7) Slide the throttle pushrod wire into the tube.
Position the engine between the mounts. Use
four M3x25mm 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.
M3x25mm
Trim and cut.
COWLING.
Trim and cut.
1) Slide the fiberglass cowl over the en-
gineandline up thebackedgeof thecowlwith
themarksyoumadeonthe fuselage then trim
and cut as shown.
Trim and cut.

SEAGULL FUNFLY 3D. Instruction Manual.
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 3) Installthe muffler and mufflerextension
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 parts included with
your model.
- Model size: .35-.45 size models
- Motor: 35mm 830 rev per volt
- Propeller: 11x7
- ESC: 50A
- Lipo Batteries: 4 cell 3200mA
Recommendation EP parts as shown (not
included with your model)
Machine screw M3x10mm.
Needlevalve.
Becauseofthesize of thecowl,itmaybe nec-
essarytouseaneedlevalve extension for the
highspeedneedlevalve. Make thisoutofsuf-
ficient length 1.5mm wire and install it into the
end of the needle valve. Secure the wire in
placebytighteningtheset screw in thesideof
the needle valve.
2) While keeping the back edge of the
cowl flush with the marks, align the front of
thecowlwiththecrankshaftoftheengine. The
front of the cowl should be positioned so the
crankshaft is in nearly the middle of the cowl
opening.Usethespinnerbackplateasaguide.
Hold the cowl firmly in place using pieces of
masking tape.
Trim and cut.

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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.
Epoxy.
4mm.
Balsa.
Epoxy.
4mm.
Blind nut.
3) Attach the motor to the front of the electric
motor box using four 3mm blind nut, four
M3x15mm hex head bolts to secure the motor.
Please see picture shown.
140mm.
M3x15mm.
Balsa.
Epoxy.
Epoxy.

SEAGULL FUNFLY 3D. Instruction Manual.
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INSTALLINGTHE HORIZONTALSTABILIZER.
1) Using a ruler and a pen, locate the
centerline of the horizontal stabilizer, at the
trailingedge,and place amark. Useatriangle
and extend this mark, from back to front,
across the top of the stabilizer. Also extend
thismarkdownthebackof the trailing edge of
the stabilizer.
2)Usingamodelingknife,carefullyremove
the covering at mounting slot of horizontal
stabilizer.
3) Put the stabilizer into place in the
position of the fuselage.
Drawcenter line.
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.
speedcontrol.
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.
Tiewraps.
4) Locate the plywood battery tray to the
fuselage.
Battery.
INSTALLING THE SPINNER.
Install the spinner backplate, propeller and
spinner cone.
Tiewraps.

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6) 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.
5) When you are satisfied with the align-
ment, hold the stabilizer in place with T- pins
or masking tape, but do not glue at this time.
Pen.
7) Removethestabilizer. Using the lines
youjustdrewasaguide, carefully remove the
covering from between them using a model-
ingknife.
Removethecovering.
8) 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.
When cutting through the covering to
remove it, cut with only enough pressure
toonlycut throughthecovering itself. Cut-
ting into the balsa structure may weaken
it.
4) Install the stabilizer onto the fuselage.
Align the centerline drawn on the top and the
rear of the stabilizer with the centre of the fu-
selage. When that is aligned, hold the stabi-
lizer in that position using T-pins or masking
tape. Align the horizontal stabilizer with the
wing. When viewed from the rear, the hori-
zontal stabilizer should be level with the wing.
Ifitisnot level, usesandpaperandsand down
the high side of the stabilizer mounting plat-
form until the proper alignment is achieved.
The tips of the stabilizer should also be equal
distance from the tips of the wing.
10) After the epoxy has fully cured, re-
move the masking tape orT-pins used to hold
the stabilizer in place. Carefully inspect the
glue joints. Use more epoxy to fill in any gaps
that may exist that were not filled previously
and clean up the excess using a paper towel
and rubbing alcohol.
Epoxy.
9) When you are sure that everything is
aligned correctly, mix up a generous amount
of 30 Minute Epoxy. Apply a thin layer to the
bottom of the stabilizer mounting area and to
the stabilizer mounting platform sides in the
fuselage. Putting the stabilizer in place and
realign. Double check all of your measure-
ments once more before the epoxy cures.
Holdthestabilizerin placewithT-pinsormask-
ing tape and remove any excess epoxy using
a paper towel and rubbing alcohol.

SEAGULL FUNFLY 3D. Instruction Manual.
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HINGING THE ELEVATOR.
Epoxy.
1) Carefully remove the elevator from one
of the fuselage panel. Note the position of the
hinges.
2) Remove each hinge from the fuselage
panel and elevator and place a T-pin in the
centerofeachhinge. Slideeachhingeinto the
elevator until the T-pin is snug against the
elevator.This willhelpensureanequal amount
ofhingeis oneithersideof thehingeline when
the elevator is mounted to the fuselage .
3) Slide the elevator on the fuselage panel
until there is only a slight gap. The hinge is
now centered on the fuselage panel and
elevator. Remove the T-pins and snug the
elevator against the fuselage panel. A gap of
1/64” or less should be maintained between
the fuselage panel and elevator.
4)Deflect the elevator and completely
saturate each hinge with thin C/A glue. The
elevator front surface should lightly contact
the fuselage during this procedure. Ideally,
when the hinges are glued in place, a 1/64”
gap or less will be maintained throughout the
lenghoftheelevatortothefuselagepanelhinge
line.
Note: The hinge is constructed of a special
materialthatallowstheC/Atowickorpenetrate
and distribute throughout the hinge, securely
bondingitto thewoodstructure ofthefuselage
panel and rudder.

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5) Slide the vertical stabilizer back in
place. Using a triangle, check to ensure that
theverticalstabilizerisaligned 90º to the hori-
zontal stabilizer.
When cutting through the covering to re-
moveit,cutwithonlyenoughpressureto
only cut through the covering itself. Cutting
into the balsa structure may weaken it.
2) Slidetheverticalstabilizerinto the slot
in the top of the fuselage. The rear edge of
thestabilizer should beflushwiththerearedge
of the fuselage and the lower rudder hinge
should engage the precut hinge slot in the
lowerfuselage. Thebottomedgeofthe stabi-
lizer should also be firmly pushed against the
top of the horizontal stabilizer.
3) 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.
Pen.
Cut.
4) Remove the stabilizer. Using a mod-
eling knife, remove the covering from below
the lines you drew.
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.
Cut.
5)Turnthe fuselagepanelover anddeflect
the elevator in the opposite direction from the
opposite side. Apply thin C/A glue to each
hinge,makingsurethattheC/Apenetrates into
the elevator and fuselage panel.
6) Using C/A remover/debonder and a
papertowel,removeany excess C/Agluethat
may have accumulated on the fuselage or in
the elevator hinge area.
Work the elevator up and down several
times to “work in” the hinges and check
for proper movement.
Note:
90º
Vertical
Stabilizer.
Horizontal
Stabilizer.

SEAGULL FUNFLY 3D. Instruction Manual.
20
ELEVATOR AND 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.
6) When you are sure that everything is
alignedcorrectly,mixup agenerousamount of
Flash30 MinuteEpoxy. Applyathinlayertothe
mounting slot in the top of the fuselage and to
the sides and bottom of the vertical stabilizer
mountingarea. Applyepoxy tothebottomand
top edges of the filler block and to the lower
hinge also. Set the stabilizer in place and re-
align. 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.
C/Aglue. Hinge.
 4) Elevatorandrudderpushrodsassembly
as pictures below.
 3) Thread one clevis and M3 lock nut on
toeachelevatorcontrol rod. Threadthehorns
onuntiltheyare flush withtheendsof the con-
trol rods.
M3 lock nut.
M3clevis.
90mm.
120mm.
Rudder control horn.
Elevator control horn.
Elevator pushrod.
Elevator control horn.