Seagull Models AT-6 TEXAN User manual

MadeinVietnam.
Specifications:
Wingspan-------------------------------------------------- 70.9in---------------------------------------180cm.
Wingarea---------------------------------------------------734.7sq.in---------------------------47.4sq.dm.
Approximateflyingweight------------------------------7.1-8.8lbs--------------------------3.6kg-4.2kg.
Length------------------------------------------------------ 46.1in----------------------------------------117cm.
Recommendedenginesize---------------------------.75cu.in-------------------------------------2-stroke.
-----------.91 cu.in-------------------------------- 4-stroke.
RecommendedR/C---------------------------------------------4channelswith6servos.
Flyingskilllevel----------------------------------------------------Advanced/Intermediate.
Kit features.
• Ready-made—minimalassembly&finishingrequired.
• Ready-covered—includingdecals,trim&covering.
• Factory-installedpushrod.
• Photo-illustrated step-by-step AssemblyManual.
MS:88
“Graphics and specfications may change without notice”.
ASSEMBLY MANUAL

AT-6 TEXAN _ CODE SEA88.Instruction Manual.
2
INTRODUCTION.
Thank you for choosing the AT-6 TEXAN ARTF by SEAGULL MODELS. The AT-6 TEXAN was
designedwiththeintermediate/advancedsportflyerinmind.Itisa semiscaleairplane whichiseasy
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
thatmostoftheworkhasbeendoneforyoualready.Themotormounthasbeenfittedandthehinges
are pre-installed . Flying the AT-6 TEXAN 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 AT-6 TEXAN . 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.
IfyouareinexperiencedwithbasicR/CflightwestronglyrecommendyoucontactyourR/Csupplier
and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training
proceduresdesignedto helpthenewpilot onhiswayto successfulR/Cflight.They willalsobeable
to advise on any insurance and safety regulations that may apply.
ADDITIONAL ITEMS REQUIRED.
.75 cu.in 2-stroke engine.
.91cu.in 4-stroke engine.
4channels with 6servos.
Computer radio with nine servos.
Glow plug to suit engine.
Propeller to suit engine.
Protective foam rubber for radio
system.
Siliconefuelline.
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/ aileron.
(1)Midle wing.
Tail section assembly
 (1) Horizontal stabilizer/ elevator
halves.
(1) Rudder halves.
Some more parts.
HARDWAREPACK
COWLING
Landing gear.....

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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-
semblyasthe AT-6TEXANismade
from natural materials and minor ad-
justmentsmayhavetobemade.The
paintandplastic parts usedin this kit
are fuel proof. However, they are not
tolerant of many harsh chemicals in-
cluding the following: paint thinner,
cyano-acrylate glue accelerator, cy-
anoacrylate glue de-bonder and
acetone. Do not let these chemicals
come in contact with the colours on
the covering and the plastic parts.
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.
1) Carefully remove the aileron from one
of the wing panels. Note the position of the
hinges.
2)Remove eachhingefrom thewing panel
and aileron and place a T-pin in the center of
each hinge. Slide each hinge into the aileron
untilthe T-pinis snugagainstthe aileron.This
will help ensure an equal amount of hinge is
oneitherside ofthehingelinewhen theaileron
is mounted to the wing panel.
HINGING THE AILERONS.
Note:
Hinge.
T-pin.
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 maintainedbetween thewing panel
andaileron.
4)Deflect the aileron and completely
saturate each hinge with thin C/A glue. The
aileronsfront surfaceshouldlightly contactthe
wing during this procedure. Ideally, when the
Thehinge is constructedofa 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.
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.
Hinge.

AT-6 TEXAN _ CODE SEA88.Instruction Manual.
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HINGING THE ELEVATORS.
Glue the elevator hinges in place using the
same tectniques used to hinge the ailerons.
HINGING THE RUDDER.
Glue the rudder hinges in place using the
same tectniques used to hinge the ailerons.
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.
6) Using C/A remover/debonder and a
papertowel, removeany excessC/A gluethat
may have accumulated on the wing or in the
aileronhinge area.
5) Turn the wing panel over and deflect the
aileron in the opposite direction from the
opposite side. Apply thin C/A glue to each
hinge,makingsurethat theC/Apenetratesinto
both the aileron and wing panel.
Aileron control horn: See pictures below.
AILERON CONTROLHORN
Hinge.
C/Aglue.
Worktheaileron up and downseveral
times to “work in” the hinges and
check for proper movement.
Note:
2 sets.
3x40mm.

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Install the elevator control horn using the
same method as with the aileron control
horns.
ELEVATOR CONTROL HORN.
M3LOCKNUT.
ALUMINUMWASHER.
ALUMINUMWASHER.
CONTRONL HORN
M3 SCREW.
16mm.
Epoxy.
Wing
Wing
Rudder control horn:
Usingthesame tectniquesused aileroncontrol
horn. See picture below.
RUDDER CONTROL HORN.
16mm.
Epoxy.
Elevatorcontrol horn.
Horizontal
Stabilizer.
AluminumWasher.
CONTRONL HORN M3
M3LOCKNUT.
Epoxy.
AluminumWasher.
Epoxy.
2 sets.
3x35mm.
1 sets.
3x35mm.
CONTRONL HORN
M3SCREW.
ALUMINUMWASHER.
ALUMINUMWASHER.
M3LOCK NUT.
EPOXY.

AT-6 TEXAN _ CODE SEA88.Instruction Manual.
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Servo arm.
loctile
secure.
Adjustableservo
connector.
25mm.
Servo for retractable only.
Metalconnector.
Servo arm.
25mm.
SERVO GEAR INSTALLATION.
Remove covering.
Rudder control horn.
Remove covering.
Electric wire.
Wing bottom.
PUSHROD INSTALLATION.
EPOXY.
Fuselage.
20mm.
Rudder.
3 x 25mm.

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Pushrod.
Open Position
Metalclevis.
M2lock.
175mm.
Landinggear.
Wheel. Wheel collar.
155mm.
Servo arm.

AT-6 TEXAN _ CODE SEA88.Instruction Manual.
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Repeat procedure for other landing
gear.
3 x 25mm.
Close Position
Servo arm.
12 mm.
C/Aglue.
C/Aglue.

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WING ASSEMBLY.
NOTE: We highly recommend using 30
minute epoxy as it is stronger and provides
more working time, allowing the builder to
properlyaligntheparts. Usingfast cureepoxy
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.
Epoxy.
INSTALLING THE WHEEL FAIRING.
Wheel Fairing.
Epoxy.
2) Removethebracewhensatisfiedwithits
fit ineach wing half. Coat the dihedral brace
with30 minute epoxy.Next, poursomeepoxy
into the dihedral box in one wing panel. Make
sure you cover the top and bottom as well as
the sides of the dihedral brace.Use enough
epoxy to fill any gaps.
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.
cut
Fillepoxy

AT-6 TEXAN _ CODE SEA88.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.
INSTALLING THE AILERON SERVOS.
Small weight.
Servos. Thread.
Aileron
Servo. Aileron
Servo.
Servo electric wire.
Small weight.
String.
String.
Small weight.
String.
Attach the string to the servo lead and carefully thread it through the wing.
Wing rib. Wing rib.
Wing.
Small weight.
Epoxy Epoxy
Epoxy
Epoxy

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ElectricAileron
servo wire.
Aileron.
Wing.
Wing.Aileron.
INSTALLATION THE PUSHROD.
M2 lock nut.
M2clevis.
95 mm.
Aileron.
wing.
60mm.
Mark and drill 4 holes for engine mount.
Insert 4 blind nuts to firewall.
Repeat the procedure for the other wing
half.
See pictures below.Make yourself the
template of your engine on paper.
ENGINE MOUNT INSTALLATION.
4x30mm.
M2locknut.
Wing.
Aileron. Thread locker glue.

AT-6 TEXAN _ CODE SEA88.Instruction Manual.
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3) Carefully bend the second nylon tube up
at a 45º angle. This tube is the vent tube.
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
siliconfuel line. Connectone endof theline to
theweighted fuelpickup and theother endto
the nylon pick up tube.
4) Carefully heat the vent tube using a
heat gun or lighter to permanently set the
angle of the tube.
 5) 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.
FuelFill Tube.
Venttube. Fuel Pick up
Tube.
 6) With the stopper assembly in place,
the weighted pickup should rest away from
therearof the tankand move freelyinsidethe
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.
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.
 7) When satisfied with the alignment of
thestopperassembly tightenthe 3mmx20mm
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.
Attach the silicone fuel and pressure pipes
tothe tank.The lowerpipeisthe‘feed’ andthe
upper two the ‘pressure and fill’. The fill pipe
is the next pipe.

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Fuelpick-up tube.
venttube.
Fuelfill tube.
Slide thetankinto thefuselage frominside so
that the neck is at the top of the fuselage and
itlocates throughthe enginebulkhead. Gently
secure it to the top horizontal former with a
cable tie.
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 the tank is installed inside
thefuselage, it may bedifficultto determine
which is which.
Plastic band.
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.
C/Aglueattached.
Fueltank.
INSTALLING THE FUSELAGE SERVOS.
Rudder.
Elevator.
Throttle servo.
Elevator servo.
Rudder servo.
Balsa block.

AT-6 TEXAN _ CODE SEA88.Instruction Manual.
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INSTALLING THE HORIZONTALSTABILIZER.
When cutting through the covering to re-
move it, cut with only enough pressure
toonlycut throughthecovering itself. Cutting
into the balsa structure may weaken it.
Draw center line.
pen.
M3 x 10mm.
M3 x 10mm.
 2)Using a3/32”drill bit,drill ahole through
the side of the fuselage, opposite the muffler,
even with the switch.
 3)Make apush-pull leverout ofscrap wire.
Attach the wire to the switch lever and route
the wire out the side of the fuselage, through
theholeyou drilled.
INSTALLING THE SWITCH.
 1) Install the switch into the precut hole in
the servo tray, in the fuselage, from the bot-
tom. Use the two screws provided with the
switch to secure it in place. Drill two 3/32”
holes through the tray for the screws to pass
through.
Some switches come with a hole
drilled through the switch tab for this very
purpose. If your switch does not, remove
the switch and drill a 3/32” hole through
the middle of the switch tab.
3/32”Hole.
Switch.
Remove covering.

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Epoxy.
Remove covering.
Epoxy
Hingeslot.
INSTALLING THE VERTICALSTABILIZER.
Epoxy.
Pen.
Remove covering.

AT-6 TEXAN _ CODE SEA88.Instruction Manual.
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C/Aglue.
Hinge.
90º
Vertical
Stabilizer.
Horizontal
Stabilizer.
Putthe verticalstabilizer intothein thetop
of the horizontal fin. The bottom edge of the
stabilizershould alsobe firmlypushed against
the top of the horizontal stabilizer.
Epoxy.
Elevator and rudder pushrods assembly follow pictures below.
M2 Lock nut.M2clevis.
Attach to servo arm in fuselage. Attach to elevator - rudder control horn.
Elevator control horn.
Rudder control horn.
ELEVATOR - RUDDER PUSHROD
INSTALLATION.
When cutting through the covering to re-
move it, cut with only enough pressure
toonlycut throughthecovering itself. Cutting
into the balsa structure may weaken it.

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Elevator pushrod.
Rudder pushrod.
Elevator.
Elevator.
16 mm.
Servo arm.
Elevator.
Elevator.
Rudder.
Rudder pushrod.
Elevator pushrod.
Rudder pushrod.
16 mm.
Servo arm.
Rudder.

AT-6 TEXAN _ CODE SEA88.Instruction Manual.
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INSTALLING THE BATTERY
Trim and cut.
COWLING.
Machine Screw 4x30mm.
MOUNTING THE ENGINE.
140mm.
Diameter =4.2mm.
Pushrod wire.
Battery.
Dummy
Engine.
Dummy
Engine.
Cowling.
Tie wrap.
Throttle servo.

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Trim and cut.
Silicon
glue.
Cowling.
Dummy
Engine.
Machine Screw 3 x 10mm.
3 x 10mm.
Trim and cut.
C/Aglue.
Oilcooling.
Remove the covering.

AT-6 TEXAN _ CODE SEA88.Instruction Manual.
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3x30mm.
MOUNTING THE TAIL WHEEL.
Seepicturebelow.
3 x 30mm.
C/Aglue.
Oilcooling.
3x25 mm.
Aluminum tail
landing gear.
3x25mm.