Seagull Models PERCIVAL MEW GULL User manual

Kit features.
• Ready-made—minimalassembly&finishingrequired.
• Ready-coveredcovering.
• Photo-illustratedstep-by-stepAssemblyManual.
MadeinVietnam.
Specifications
Wingspan---------------------------------74in------------------------188cm.
Wing area-------------------------------- 797.2 sq.in ---------- 51.4 sq.dm.
Weight------------------------------------ 11lbs ---------------------- 4.5 -5 kg.
Length-------------------------------------60.7in ------------------- 154.3cm.
Recommendedenginesize----------1.20cu.in----------------2-stroke.
1.25-1.50----------------- 4-stroke.
Radio System required 6 channel with 6 digital servos.
FlyingskilllevelIntermediate/advanced.
MS: SEA 98.
“Graphics and Specfications may change without notice”.
PERCIVAL
ASSEMBLY MANUAL
MEW GULL

PERCIVAL MEW GULL .Instruction Manual.
2
INTRODUCTION.
Thank you for choosing the PERCIVAL MEW GULL ARTF by SEAGULL MODELS. The
PERCIVAL MEW GULL was designed with the intermediate/advanced sport flyer in mind. It is a
scale airplane whichiseasytoflyandquicktoassemble.Theairframeisconventionallybuiltusing
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
hasbeenfittedandthehingesarepre-installed.FlyingthePERCIVALMEW GULL issimplyajoy.
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manual thoroughlybefore startingassembly of your PERCIVAL MEW GULL .Usethe 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
supplierandjoinyourlocalR/CModelFlyingClub.R/CModelFlyingClubsofferavarietyoftraining
proceduresdesignedtohelp thenewpilotonhiswaytosuccessful R/Cflight.Theywillalsobeable
to advise on any insurance and safety regulations that may apply.
ADDITIONAL ITEMS REQUIRED.
1.20 cu.in 2-stroke
1.25 - 1.50 4-stroke engine
Radio System required 4 channels
with 6 digital servos
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
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
PARTS LISTING.
FUSELAGE ASSEMBLY
(1) Fuselage
(1) Canopy
WING ASSEMBLY
(1) Right wing half/ aileron
(1) Left wing half with/ aileron
(1) Aluminium dihedral brace
Tail section assembly
(1) Horizontal stabilizer/ elevator
halves.
(1) Rudder halves.
Some more parts.
HARDWAREPACK
COWLING
Landinggear.....

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NOTE:To avoid scratching your new aero-
planewesuggestthatyoucoveryour
workbench with an old towel. Keep a
couple of jars or bowls handy to hold
the small parts after you open the
bags.
Pleasetrialfitallparts.Makesureyou
havethecorrectpartsandthattheyfit
andarealignedproperlybeforegluing!
This will ensure proper assembly as
the PERCIVALMEWGULL ismade
from natural materials and minor ad-
justments may have to be made.
The paint and plastic parts used in
this kit are fuel proof. However, they
arenottolerantofmanyharshchemi-
cals including the following: paint
thinner, cyano-acrylate glue accel-
erator,cyanoacrylategluede-bonder
andacetone.Donotletthesechemi-
calscome in contact with the colours
onthecoveringandtheplasticparts.
1)Carefully removethe aileron from one of
thewingpanels.Notethepositionofthehinges.
2)Remove each hingefrom 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. This will help ensure an equal amount
ofhingeisoneithersideofthehingelinewhen
the aileron is mounted to the aileron.
HINGING THE AILERONS.
3) Slide the wing panel on the aileron 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
shouldbemaintained between thewing panel
andaileron.
The control surfaces, including the
ailerons, elevators, and rudder, are
prehinged with hinges installed, but the
hinges are not glued in place. It is
imperativethat you properlyadhere the
hingesin place perthe steps thatfollow
using a high-quality thin C/A glue.
Note:
4)Deflect the aileron and completely
saturate each hinge with thin C/A glue. The
aileronsfrontsurfaceshouldlightlycontactthe
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.
Note: The hinge is constructed of a special
material that allows the C/A to wick or
penetrateanddistributethroughoutthe
hinge, securely bonding it to the wood
structureofthe wing panelandaileron.
Hinge
T-pins.
Hinge.
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,makingsure thattheC/Apenetratesinto
both the aileron and wing panel.
6)UsingC/Aremover/debonderandapaper
towel, remove any excess C/A glue that may
haveaccumulatedonthewingorintheaileron
hingearea.

PERCIVAL MEW GULL .Instruction Manual.
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HINGING THE ELEVATOR.
HINGING THE RUDDER.
Glue the elevator hinges in place using the
same tectniques used to hinge the ailerons.
Glue the rudder hinges in place using the
same tectniques used to hinge the ailerons.
Work the aileron up and down several
times to “work in” the hinges and check
for proper movement.
Note:
Hinge.
Aileron control horn installation: See pictures
below.
AILERON CONTROLHORN
M3LOCK
NUT.
ALUMINUMWASHER.
ALUMINUMWASHER.
CONTRONLHORN
M3 SCREW.
Epoxy.
Epoxy.
2 sets.
3x40mm.
Wing
bottom.
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.
7) Repeat this process with the other wing
panel, securely hinging the aileron in place.
18mm.
Aileroncontrol horn.
Aileron.

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ELEVATOR CONTROL HORN.
Install the elevator control horn using the
same method as with the aileron control
horns.
2 sets.
3x45mm.
2 sets.
3x50mm.
Elevator control horn.
Rudder control horn:
Usingthesame tectniques usedaileroncontrol
horn. See picture below.
RUDDER CONTROL HORN.
Rudder control horn.
Hinge.
AluminumWasher.
CONTRONL HORN M3
M3LOCKNUT.
Epoxy.
AluminumWasher.
Horizontal
stabilizer Elevator
18mm.
EPOXY.
Fuselage. Rudder.
Horizontal
Stabilizer.
18mm.
EPOXY.
Elevator.
CONTRONL HORN
M3 SCREW.
ALUMINUMWASHER.
ALUMINUMWASHER.
M3LOCK NUT.
EPOXY.
FUSELAGE Rudder

PERCIVAL MEW GULL .Instruction Manual.
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ENGINE MOUNT INSTALLATION.
Mark and drill 4 holes for engine mount.
Insert 4 blind nuts to firewall.
4x30mm.
Thread locker glue.
see pictures below.Make yourself the
template of your engine on paper.
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.
3) Carefully bend the second nylon tube
up at a 45º angle. This tube is the vent tube.
Vent tube. Fuel pick up tube.
Fuel fill tube.
2) Usinga modeling knife, cut one length
ofsiliconfuel line. Connect one end oftheline
tothe weighted fuelpick up and the other end
to the nylon pick up tube.
Carefully use a lighter or heat gun to
permenently set the angle of the vent tube.
Important: When the stopper assembly is in-
stalled in the tank, the top of the vent tube
should rest just below the top surface of the
tank. It should not touch the top of the tank.
Balsa wood.

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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
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
thetank is installedinside the fuselage,it may
be difficult to determine which is which.
Rubber band. Fueltank.
Fuel pick-up tube. Fuelfill tube.
Venttube.
1) Using a modeling knife, remove the
covering from over the two main gear mount-
ing slots located in the bottom of the wing.
INSTALLING THE MAIN GEAR WIRES.
A.
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.
B.
Battery.
1_ Glow Engine.
2_ ElectricConversion (EPPower)
(OPTION).
Pictures and instruction will update soon .
INSTALLING THE BATTERY.

PERCIVAL MEW GULL .Instruction Manual.
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Remove
covering.
M3 x 10mm.
M3 x 15mm.
1.5mm.
Wheel.
Axle.
Wheel collar.
Landinggear.
Axle.
Wheel collar.
M8.
M4 x 6mm.
M3x10mm.
2) Insert the 90º bend of one main gear
wire and support mounting block into the pre-
drilled hole in one mounting slot.

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4) Remove the engine. Using an drill bit,
drill the mounting holes through the engine
mount at the four locations marked.
 3) When you are satisfied with the align-
ment, mark the locations of the engine
mounting.

1) Install the pushrod housing through the
predrilledholeinthefirewalland into the servo
compartment. The pushrod housing should
protrude 1/4" out past the front of the firewall.
MakeaZ-Bend 1/4" from one endoftheplain
wire pushrod.
MOUNTING THE ENGINE.
 2) Place your engine onto the engine
mount. Adjust the engine is centered of the
edges of the engine case.
 6) AttachtheZ-Bendin the pushrodwireto
the throttle arm on the carburetor.
 5) Boltthe enginetotheengine mountusing
the four machine screws. Double check that
all the screws are tight before proceeding.
150mm.
4.2 mm diameter.
Pushrodwire.
MachineScrew M4x30mm.
M3 x 10mm.
M3 x 10mm.
M3 x 10mm.
M3 x 10mm.

PERCIVAL MEW GULL .Instruction Manual.
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Becauseofthe size of thecowl, it may benec-
essaryto use aneedle valve extensionfor the
highspeedneedlevalve. Make this out ofsuf-
ficient length 1.5mm wire and install it into the
end of the needle valve. Secure the wire in
placeby tightening the set screw in theside of
the needle valve.
2) While keeping the back edge of the
cowl flush with the marks, align the front of
thecowlwiththecrankshaftof the engine. The
front of the cowl should be positioned so the
crankshaft is in nearly the middle of the cowl
opening.Usethe spinnerbackplateasaguide.
Hold the cowl firmly in place using pieces of
masking tape.
COWLING INSTALLATION.
1) Slide the fiberglass cowl over the en-
gineandlineupthe back edge of thecowlwith
themarks you madeon the fuselagethen trim
and cut.
Trim and cut.
Trim and cut.
Trim and cut.
3) Installthemufflerandmufflerextension
onto the engine and make the cut out 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 3x10mm screws (4).
MachineScrewM3x10mm.
.

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needlevalve.
Install the spinner backplate, propeller and
spinner cone.
SPINNER INSTALLATION.
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.
INSTALLING THE SWITCH.
Installtheswitch into the precutholein the
side of fuselage.
Switch.
THROTTLE SERVO ARM INSTALLATION.
Install adjustableservoconnectorinthe servo
arm .
AdjustableServo
connector.
Servoarm.
Loctite secure.
1PCS.
Throttleservo.
Elevatorservo.
Elevatorservo.
Rudderservo.
 2) Secure the servos with the screws pro-
vided with your radio system.
INSTALLING THE FUSELAGE SERVO.
1) Installthe rubber grommetsand brass
colletsonto the throttle servo. Test fit the servo
into the aileron servo mount.
Because the size of servos differ, you
mayneedtoadjustthesizeoftheprecutopen-
ing in the mount. The notch in the sides of the
mount allow the servo lead to pass through.

PERCIVAL MEW GULL .Instruction Manual.
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Attach the string to the servo lead and carefully thread it though the wing.
String.
Small Weight.
Wing. Wing rib.
String.
Small Weight.
AILERONPUSHROD HORN INSTALLATION
Wing.
Aileron. M3 lock nut.
M3clevis.
85mm.
110mm.
Installing the aileron servo in place using the
same techniques used to flap servo.
INSTALLING THE AILERON SERVOS.
Servos. Smallweight.
Thread.
String.
Small weight.
Electric wire.
Aileron
Servo.
Throttleservoarm.
Elevator servo.
Elevator servo.
Rudder servo.
INSTALLING THEAILERONSERVOS.

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Aileron.
Wing.
Wing.Aileron.
Maskingtape.
Epoxy.
Repeat the procedure for the other wing.
Wing.
Aileron.
M3lock nut.
WING ASSEMBLY.
NOTE: We highly recommend using 30
minute epoxy as it is stronger and provides
more working time, allowing the builder to
properlyalignthe parts.Usingfastcureepoxy
whenjoiningthewinghalvescouldresultinthe
gluedryingbeforethewinghalvesarealigned
properlywhichmayresultinfailureofthewing
centre section during flight.
 1)Testfitthewingtubeintoeachwinghalf.
The brace should slide in easily up to the
centreline that you drew. If not, use 220 grit
sandpaper with a sanding block and sand
down the edges and ends of the brace until it
fits properly.
2) Removethebracewhensatisfiedwithits
fitineachwinghalf.Coatbothsidesofonehalf
of the dihedral brace with 30 minute epoxy.
Next,poursomeepoxyintothedihedralboxin
one wing panel. Make sure you cover the top
andbottomaswellasthesidesofthedihedral
brace. Use enough epoxy to fill any gaps.

PERCIVAL MEW GULL .Instruction Manual.
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 3) Peel off the backing from the self adhe-
sivecoveringstrip.Applythestriptothecentre
section of the wing starting from the bottom
trailingedge.Wrapthestripallthewayaround
the wing until it meets the trailing edge again.
Trim off any excess strip.
Maskingtape.
Carefully slide the two wing halves together
and firmly press them together, allowing the
excess epoxy to run out. There should not be
any gap in the wing halves. Use rubbing
alcohol and a paper tower to clean up any
excess epoxy.
Apply masking tape at the wing join to hold
the wing halves together securely.
MOUNTING THE TAIL WHEEL.
See pictures below.
M3 x 25mm.
INSTALLING VERITICAL FIN.
 1)Removethe covering as picture shown
below.
Maskingtape.
Removethecovering.
Epoxy.
M3 x 25mm.
Cut.
Hinge.

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Coveringstrip.
C/Aglue.
Hinge.
Hingeslot.
 2) When you are sure that everything is
aligned correctly, mix up a generous amount
of 30 Minute Epoxy. Apply a thin layer to the
topandbottom of thestabilizer mounting area
and to the stabilizer mounting platform sides
inthe fuselage. Put thestabilizer in placeand
realign. Double check all of your measure-
ments once more before the epoxy cures.
HoldthestabilizerinplacewithT-pinsormask-
ing tape and remove any excess epoxy using
a paper towel and rubbing alcohol.
Epoxy.
Cut.
Epoxy.
INSTALLING HORIZONTAL FIN.
 1) Remove the covering as same as
pictures shown below.
 2) Sand the aluminium tube using
sandpaper. This will improve the bond of the
epoxy to the cardboard horizontal fin.
Coatbothsidesofonehalfofthealuminium
tube with 30 minute epoxy. Next, pour some
epoxy into the cardboard horizontal fin. Use
enough epoxy to fill any gaps.
Epoxy.
Epoxy.

PERCIVAL MEW GULL .Instruction Manual.
16
Epoxy.
 3) Insert aluminiumtubeinto thecardboard
of fuselage.
4) Slide the two horizontal fin halves to-
getherandcarefullyalignthemat thepossition
onthefuselage.Wipeawayanyexcessepoxy
using paper towels.
Epoxy.
Epoxy.
Epoxy.
Aluminiumtube. 3 x 70mm.
Cut.
Fill epoxy.

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 1)Elevatorandrudderpushrods assembly
follow pictures below.
M2clevis.
Attach to servo arm in fuselage.
M2 Lock nut.
Attach to elevator - rudder control horn.
Rudder pushrod.
Control horn.
Elevator Pushrod.
Metalclevis.
Elevator pushrod.
M2lock nut.
Elevator.
Rudder.
Throttle.
Elevator control horn.
Rudder control horn.
ELEVATOR - RUDDER PUSHROD HORN
INSTALLATION.

PERCIVAL MEW GULL .Instruction Manual.
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 3) Routetheantennain theantennatube
inside the fuselage and secure it to the bot-
tom of fuselage using a plastic tape. See pic-
ture below.
Antenna.
Receiver.
Tie Wrap.
 1) Plug the servo 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.
INSTALLING THE RECEIVER.
Elevator.
Elevator.
Rudder.
Throttle.
 2) Install servos arm to servos. Notice the
position of the servo arms on the servos. See
picture below.
A.
C/Aglue.
A.
Epoxy.
A.

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BALANCING.
1)Itiscriticalthatyourairplanebebalanced
correctly. Improper balance will cause your
planeto lose control and crash. The center of
gravity is located 70mm back from the lead-
ing edge of the wing, measured at the wing
tip.
Bolt the wing to fuselage.
ATTACHMENT WING - FUSELAGE.
Wing bolt.
2) Turnon the radio system, and with the
trim tabs on the transmitter in neutral, center
the control surfaces by making adjustments
totheclevisesoradjustableservoconnectors.
The servo arms should be centered also.
1) We highly recommend setting up the
PERCIVAL MEWGULL using the control
throws listed at right. We have listed control
throwsforLow Rate (initialtestflying/sport fly-
ing) (aerobatic flying).
CONTROL THROWS.
 3) When the elevator, rudder and aileron
control surfaces are centered, use a ruler and
check the amount of the control throw in each
surface. The control throws should be
measured at the widest point of each sur-
face!
 4) By moving the position of the adjust-
able control horn out from the control surface,
you will decrease the amount of throw of that
control surface. Moving the adjustable con-
trol horn toward the control surface will in-
crease the amount of throw.
When balanced correctly, the airplane should
sit level or slightly nose down when you lift it
up with your fingers.
To correct this, move the battery and receiver
forward or if this is not possible, stick weight
ontothefirewallor use abrassheavyhubspin-
ner hub.
2) If the nose of the plane falls, the plane is
noseheavy. Tocorrect thisfirst move the bat-
terypackfurther back inthefuselage. If this is
not possible or does not correct it, stick small
amounts of lead weight on the fuselage sides
underthe horizontal stabilizer. If the tailofthe
plane falls, the plane is tail heavy.
70mm
FLIGHT PREPARATION.
 B) Plug in your radio system per the
manufacturer's instructions and turn every-
thingon.
 C) Check the elevator first. Pull back on
theelevator stick. The elevatorhalves should
move up. If it they do not, flip the servo re-
versing switch on your transmitter to change
the direction.
 A) Check the operation and direction of
the elevator, rudder, ailerons and throttle.
INITIALFLYING/SPORT FLYING
Ailerons: 10mm” up 10mm” down.
Elevator: 10mm” up 10mm” down.
Rudder: 15mm” right 15mm” left.
AEROBATICFLYING
Ailerons: 15mm” up 15mm” down.
Elevator: 15mm”up 15mm” down.
Rudder: 20mm” right 20mm” left.
Donotuse the aerobatic settings for
initialtest flying or sportflying.

PERCIVAL MEW GULL .Instruction Manual.
20
5) If your radio transmitter is equipped
withdualrate switches doublecheck 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.
8) Properly balance thepropeller. An out
of balance propeller will cause excessive vi-
bration which could lead to engine and/or air-
frame failure.
We wish you many safe and enjoyable
flights with your PERCIVAL MEW GULL .
7) Check the receiver antenna. It should
be fully extended and not coiled up inside the
fuselage.
4) Check the controlsurfaces. All should
move in the correct direction and not bind in
any way.
3) Double check the balance of the air-
plane. Do this with the fuel tank empty.
2) Check every bolt and every glue joint
in the PERCIVAL MEW GULL to ensure that
everything is tight and well bonded.
 F) From behind the airplane, look at the
aileronontherightwinghalf. Movetheaileron
sticktotheright. The rightaileronshouldmove
upandthe other aileron shouldmovedown. If
it does not, flip the servo reversing switch on
your transmitter to change the direction.
 E)Check thethrottle. Moving the throttle
stick forward should open the carburetor bar-
rel. Ifitdoesnot,flip the servo reversingswitch
on your transmitter to change the direction.
PREFLIGHT CHECK.
1) Completely charge your transmitter
and receiver batteries before your first day of
flying.
 D) Check the rudder. Looking from be-
hindthe airplane,move the rudder stick to the
right. Theruddershouldmove to the right. If it
does not, flip the servo reversing switch on
your transmitter to change the direction.