Seagull Models Ultimate User manual

Kit features.
• Ready-made—minimalassembly&finishingrequired.
• Ready-coveredcovering.
• Photo-illustratedstep-by-stepAssemblyManual.
MadeinVietnam.
Specifications
Wingspan---------------------------------------------43in---------------------------109cm.
Wingarea---------------------------------------589sq.in------------------------38sq.dm.
Weight------------------------------------------------6-7lbs-----------------------2.7-3.2kg.
Length-------------------------------------------------44.8in------------------------113.7cm.
Recommendedenginesize----------.46-.55cu.in---------------------------2-stroke.
.72-.82 cu.in -------------------------- 4-stroke.
RadioSystemrequired6channelwith 6 servos.
Flyingskilllevel-------------------Intermediate/advanced.
ASSEMBLY MANUAL
ULTIMATEMS:63
“Graphics and Specfications may change without notice”.

ULTIMATE. Instruction Manual.
2
INTRODUCTION.
Thank you for choosing the ULTIMATE ARTF by SEAGULL MODELS. The ULTIMATE was
designed with the intermediate/advanced sport flyer in mind. It is a semi scale airplane which is
easytoflyandquicktoassemble.Theairframeisconventionallybuiltusingbalsa,plywood tomake
itstrongerthantheaverageARTF,yetthedesignallowstheaeroplanetobekeptlight.Youwillfind
that most of the work has been done for you already.Flying the ULTIMATE 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 ULTIMATE. 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
supplierandjoinyourlocalR/CModelFlyingClub.R/CModelFlyingClubsofferavarietyoftraining
proceduresdesignedtohelpthenewpilotonhiswaytosuccessfulR/Cflight.Theywillalsobeable
to advise on any insurance and safety regulations that may apply.
ADDITIONAL ITEMS REQUIRED.
.46-.55 2-stroke engine.
.72-.82 4-stroke engine.
Computer radio with six servos.
Glow plug to suit engine.
Propeller to suit engine.
Protective foam rubber for radio
system.
Siliconefuel 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 hatch.
WING ASSEMBLY
(2) Right wing half/ aileron.
(2) Left wing half/ aileron.
(2) 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
have the correct parts and that they
fit and are aligned properly before
gluing! This will ensure proper as-
sembly as the ULTIMATE is made
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.Donot let thesechemi-
calscome incontact withthe colours
onthecovering and the plasticparts.
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 properly adhere the
hingesin placeper 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)Removeeach hinge fromthewingpanel
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
ofhingeison either sideofthehingeline when
the aileron is mounted to the aileron.
HINGING THE AILERONS.
Note:
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
shouldbe maintained betweenthe wing panel
andaileron.
Hinge.
T-pin.
4)Deflect the aileron and completely
saturate each hinge with thin C/A glue. The
aileronsfrontsurfaceshould lightly contactthe
wing during this procedure. Ideally, when the
The hinge is constructed of a special
material that allows the C/A to wick or
penetrateanddistributethroughout the
hinge, securely bonding it to the wood
structureof the wingpanel and aileron.
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:
T-pin.
C/Aglue.

ULTIMATE. Instruction Manual.
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Work the aileron up and down several
times to “work in” the hinges and check
for proper movement.
Glue the elevator hinges in place using the
same tectniques used to hinge the ailerons.
HINGING THE ELEVATOR.
Note:
8)Afterbothailerons are securelyhinged,
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, remove anyexcess C/A gluethat
may have accumulated on the wing or in the
aileronhinge area.
HINGING THE RUDDER.
INSTALLING THE AILERON SERVOS
(LOWER WING).
Glue the rudder hinges in place using the
same tectniques used to hinge the ailerons.
Servotray.
Removecovering.
Markpoint.
5)Turn the wingpanel over anddeflect the
aileron in the opposite direction from the
opposite side. Apply thin C/A glue to each
hinge,makingsurethat the C/A penetrates into
both the aileron and wing panel.

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String.
Small weight.
Because the size of servos differ, you
mayneedtoadjustthe size of the precut open-
ing in the mount. The notch in the sides of
themountallowtheservoleadtopassthrough.
Install the rubber grommets and brass
collets onto the aileron servo. Test fit the
servo into the aileron servo mount.
Using a small weight (Weighted fuel pick-up
workswell) and thread, feedthe string through
the wing as indicated.
Removecovering.
Servos. Smallweight.
Thread.
C/Aglue.
Servotray.
Attach the string to the servo lead and
carefully thread it though the wing. Once you
havethreadthe leadthroughtthewing,remove
the string so it can use for the other servo
lead.Tapetheservoleadtothewingtoprevent
it from falling back into the wing.
Lower wing
bottom.
Thread.
Small weight.
Electric wire.
String.
Secure the servos with the screws pro-
vided with your radio system.

ULTIMATE. Instruction Manual.
6
1) Using a ruler & pen to draw a straight
line as below picture.
Repeat the procedure for orther wing
haft.
INSTALLING THE AILERON LINKAGE
(LOWER WING).
Lower wing panel
bottom.
Thread.
Electric wire.
Pull.
Plastic tape.
Aileronelectric.


2) Locate the nylon control horns,nylon
control horn backplates and two machine
screws.


3)Position theaileron horn on the bottom
side of aileron.
 4) Using a 1.5mm drill bit and the control
horns as a guide, drill the mounting holes
through the aileron halves.
Pen.
ControlHorn.
MountingScrews. Mounting Plate.
Grind.
2x20mm.
Lower wing bottom.
Ruler.
Wing. Aileron.

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M2lock nut.
Markpoint.
Cut.
3x30mm.
Repeat the procedure for the other
aileron servo.
Installing the turnbuckle for aileron linkage
of lower wing as same as pictures below.
Lowerwing bottom.
INSTALLING THE TURNBUCKLE
(LOWER WING).
Lower wing bottom.
7 mm
Cut.
Lower wing bottom.

ULTIMATE. Instruction Manual.
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PLASTIC STRAP INSTALLATION
LOWER WING.
Installing the plastic strap of lower wing for
wing strut as same as pictures below.
Slot.
Lower wing top.
B
A
Repeat the procedure for the other
wing haft.
Repeat the procedure as same as
lower wing. See pictures below.
PLASTIC STRAP INSTALLATION
UPPER WING.
Lower wing
bottom.
Repeat the procedure for the other
wing half.
ENGINE MOUNT.
See pictures below:
Mark and drill 4 holes for engine mount.
4x25mm.
Upper wing bottom.
Slot.
B
A
Grind.
Lower wing
bottom.
Upper wing bottom.
BA
Epoxy glue
(do not use C/A glue).
AB
B
A
Lower wing top. Epoxy glue
(do not use C/A glue).

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INSTALLING THE BATTERY
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 STOPPERASSEMBLY.
FUEL TANK.
2) Usinga modeling knife, cut onelength
ofsiliconfuel line. Connectoneend of theline
tothe weighted fuel pick up andthe otherend
to the nylon pick up tube.
3) Carefully bend the second nylon tube
up at a 45º angle. This tube is the vent tube.
Silicon tubing not inclued.
Battery.
Thread locker.
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 insidethe
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.
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.
Carefully use a lighter or heat gun to
permenently set the angle of the vent tube.
Vent tube. Fuel pick up tube.
Fuel fill tube.

ULTIMATE. Instruction Manual.
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Attach the silicone fuel and pressure pipes
tothetank. The lowerpipeis the ‘feed’andthe
uppertwo the ‘pressureand fill’.The fill pipeis
the next pipe.
Plastic tape.
Rubber band.
Fueltank.
 2) Follow diagram below for wheel pant
installation:
WheelCollar.
Axle.
Wheel. Nut.
Wheel Pant.
LandingGear.
Nut.
(2)Washer.
Fuel pick-up tube.
Fuel fill tube.
Vent tube.
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.
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.
1)Assembleand mounting thewheelpants
as shown in the following pictures.
WHEEL AND WHEEL PANTS.
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.

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(2)Wheel Collar.
Axle.
Wheel. Nut.
Nut.
(2)Washer.
Landinggear.
3) You have to trim each axle using a tool
cutting and cut-off wheel.
Caution when cutting the axles and wear
protective goggles.
46mm.
MOUNTING THE ENGINE.
1) Install the pushrod housing through the
predrilledholein the firewallandinto the servo
compartment. The pushrod housing should
protrude 1/4" out past the front of the firewall.
MakeaZ-Bend 1/4" fromone end oftheplain
wire pushrod.
1) The blind nuts for securing the landing
gearare already mountedinside the fuselage.
2) Usingthe hardware provided, mount the
main landing gear to the fuselage.
INSTALLING THE MAIN LANDINGGEAR.
4 X 20mm.
 4) 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.
5mm.
10mm.

ULTIMATE. Instruction Manual.
12
Pushrod wire. 4x30mm.
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.
 6) Attach the Z-Bendinthe pushrodwireto
the throttle arm on the carburetor.
 5) Bolttheengineto theenginemountusing
the four machine screws. Double check that
all the screws are tight before proceeding.
2mm.
3x25mm.
Because of the size of the cowl, it may be
necessaryto use a needle valveextension for
thehigh speed needle valve. Make thisout of
sufficient length 1.5mm wire and install it into
the end of the needle valve. Secure the wire
inplace bytightening the set screw in the side
ofthe needle valve.
3x10mm.
Trim and cut.
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.Usethespinnerbackplateasa guide.
Hold the cowl firmly in place using pieces of
masking tape.
115mm.
COWLING.
1) Slide the fiberglass cowl over the en-
gineandline up thebackedge of thecowlwith
themarks youmade on thefuselage thentrim
and cut.
 2) Place your engine onto the engine
mount. Adjust the engine is centered of the
edges of the engine case.

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3) Installthemufflerandmufflerextension
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 3x10mm screws (4).
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.
Install the spinner backplate, propeller and
spinner cone.
INSTALLING THE SPINNER.
3 x 10mm.
1.5mm wire
(needlevalve).
INSTALLING THE FUSELAGE SERVO.
Throttle servo. Rudder
servo.
Elevator
servo.
Elevator
servo.
INSTALLING THE SWITCH.
Installthe switch intothe precut holein the
side in the fuselage.
Switch.
Remove covering. Switch Possition.

ULTIMATE. Instruction Manual.
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Removecovering.
 3) Secure the servos with the screws pro-
vided with your radio system.
 4) Install the pushrod throttle.
Throttle.
2)Usinga modeling knife, carefullyremove
thecoveringat mountingslotof horizontal sta-
bilizer ( both side of fuselage).
Center line.
HORIZONTALSTABILIZER.
1) Using a ruler and a pen, locate the
centerlineof thehorizontalstabilizer,atthetrail-
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
thismark downthe back of the trailing edge 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.
 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.
 5) Remove the stabilizer. Using thelines
youjust drewas a guide, carefully removethe
covering from between them using a model-
ingknife.
Pen.
2) Installthe rubbergrommets and brass
colletsonto the throttleservo. Testfit theservo
into the throttle servo mount.
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 adjustable servo connector in
the servo arm.
THROTTLESERVOARM INSTALLATION.
Removecovering.
Servoarm.
Adjustableservo
connector.
Threadlocker glue.

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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
topand bottom ofthe stabilizermounting area
and to the stabilizer mounting platform sides
in the fuselage. Slide the stabilizer in place
and realign. Double check all of your mea-
surementsoncemore before theepoxy cures.
Holdthestabilizerin place withT-pinsormask-
ing tape and remove any excess epoxy using
a paper towel and rubbing alcohol.
 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.
When cutting through the coveringto re-
moveit, cut with only enoughpressure to only
cut through the covering itself. Cutting into
the balsa structure may weaken it.
VERTICAL STABILIZER INSTALLATION.
 8) 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.
Remove covering.
Covered wood
filler piece. 3)Whileholding thevertical 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.
2) Slidethe vertical stabilizer into theslot
in the top of the fuselage. The rear edge of
thestabilizer shouldbe flushwiththerearedge
of the fuselage and the lower rudder hinge
should engage the precut hinge slot in the
lowerfuselage. The bottomedge of the stabi-
lizer should also be firmly pushed against the
top of the horizontal stabilizer.
Hingeslot.
1) Using a modeling knife, remove the
covering from over the precut hinge slot cut
intothelowerrearportionofthe fuselage. This
slot accepts the lower rudder hinge.
Hinge.

ULTIMATE. Instruction Manual.
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5) Slide the vertical stabilizer back in
place. Using a triangle, check to ensure that
thevertical stabilizer is aligned 90ºto thehori-
zontal stabilizer.
90º Vertical
Stabilizer.
Horizontal
Stabilizer.
6) When you are sure that everything is
alignedcorrectly, mixupagenerousamountof
30MinuteEpoxy. Applyathinlayertothemount-
ingslotinthetopofthefuselageandtothesides
and bottom of the vertical stabilizer mounting
area. Applyepoxy tothebottomand top edges
of the filler block and to the lower hinge also.
When cutting through the covering to re-
moveit, cut with only enoughpressure to only
cut through the covering itself. Cutting into
the balsa structure may weaken it.
4) Remove the stabilizer. Using a mod-
eling knife, remove the covering from below
the lines you drew. Also remove the covering
from the bottom edge of the stabilizer and the
bottomandtopedges of thefillerblock. Leave
the covering in place on the sides of the filler
block.
Remove
covering.
Set the stabilizer in place and realign. Double
checkallofyour measurements once more be-
foretheepoxycures.Holdthestabilizerinplace
with T-pins or masking tape and remove any
excess epoxyusing a paper toweland rubbing
alcohol. Allow the epoxy to fully cure before
proceeding.
CONTROL HORN INSTALLATION.
 1) Locate the two nylon control horns,
two nylon control horn backplates and four
machine screws.
 2) Position the elevator horn on the both
sideof elevator.The clevis attach-mentholes
should be positioned over the hinge line.
 3) Install the elevator control horn using
the same method as with the aileron control
horns.
Pen.
C/Aglue. Rudder.
2x20mm.

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ControlHorn.
MountingScrews. Mounting Plate.
 4)Install the rudder control horn using the
same method as with the elevator control
horns.
1) Thread one clevis and M2 lock nut on
toeachelevator control rod. Threadthehorns
onuntilthey areflushwith the endsof the con-
trol rods.
ELEVATOR - RUDDER PUSHROD
INSTALLATION.
Right side.
Elevator control horn.
Left side.
Rudder control horn.
Elevator control horn.
Elevatorpushrod.
Controlhorn.
Clevis.
Rudderpushrod.
Throttle.
Rudder.
Elevator.
Elevator.
2) Elevator pushrods assembly follow
pictures below.
 3) Secure the tail wheel bracket in place
using two 2x20mm wood screws. Be careful
not to overtighten the screws.
 2) Using a pen, mark the locations of the
two mounting screws. Remove the tail wheel
bracket and drill 1mm pilot holes at the loca-
tions marked.
MOUNTINGTHETAILWHEELBRACKET.
 1) Set the tail wheel assembly in placeon
the plywood plate. The pivot point of the tail
wheel wire should be even with the rudder
hingelineand thetailwheel bracket shouldbe
centered on the plywood plate.
Fin. Elevator.

ULTIMATE. Instruction Manual.
18
MOUNTING THE CONTROL CLASP.
See pictures below:
2x20mm.
2 screws.
Controlclasp.
1) Plug the six servo leads and the switch
leadinto thereceiver.Plugthebatterypacklead
into the switch also.
2) Wrap the receiver and battery pack in
the protective foam rubber to protect them
from vibration.
 3) Route theantenna in the antennatube
inside the fuselage and secure it to the bot-
tom of fuselage using a plastic tape.
INSTALLING RECEIVER.
 1) Remove the covering in the top of the
fuselage for the cabane struts.
 2) Slide the cabane into position.
CABANE STRUT INSTALLATION.
 3) Secure the cabane into position using 4
socket head bolts ( Type B).
(B) 3x10mm(4pcs).
Tiewrap.
Receiver.
Antenna.
This part will remove
away when the cabane locate
in correct the possition.
Factory Pre-Assembled
The cabane.

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THE CENTER RIB INSTALLATION.
B(2) 3x10cm.
Rib center
C
B
See pictures below:
ATTACHMENT WING.
(D) Lower wing tube:36.3cm.
(E) Upper wing tube: 24.5cm.
(D)
2 sets.
E
Lower wing.
Upperwing.
Wing bolts.

ULTIMATE. Instruction Manual.
20
Place on strut into position. Make sure the
curveson thestrutfollowtheairfoilof thewings.
2
1
Parts requirement. See pictures below:
INSTALLING THE AILERON LINKAGE
(UPPER-LOWER MAIN WING).
3
4
AIRFOIL STRUT INSTALLATION.
3
2x20mm.
1.8x180mm.
M2 lock nut.
M2clevis.
Lower wing top.
Drill hole1.5mm.
4
Upper wing bottom.
3