Seagull Models AT-6 TEXAN User manual

MadeinVietnam.
Specifications:
Wingspan----------------------------------------------------82.8in-------------------------------------210.3cm.
Wingarea-----------------------------------------------------1002.9sq.in-----------------------------64.7sq.dm.
Approximateflyingweight------------------------------11-12.8lbs----------------------------5kg-5.8kg.
Length--------------------------------------------------------53.9in--------------------------------------136.8cm.
Recommendedenginesize----------------------------1.2cu.in-----------------------------------2-stroke.
RecommendedR/C----------------------------------4channelswith7digitalservos.
Flyingskilllevel-------------------------------------------Advanced/Intermediate.
Kit features.
• Ready-made—minimalassembly&finishingrequired.
• Ready-covered—includingdecals,trim&covering.
• Factory-installedpushrod.
• Photo-illustrated step-by-step AssemblyManual.
MS:76
“Graphics and specfications may change without notice”.
ASSEMBLY MANUAL

AT-6 TEXAN _ CODE SEA 76.Instruction Manual.
2
INTRODUCTION.
Thank you for choosing the AT-6 TEXAN ARTF by SEAGULL MODELS. The AT-6 TEXAN was
designed with the intermediate/advanced 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
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 helpthenew pilotonhiswayto successfulR/Cflight. Theywillalsobeable
to advise on any insurance and safety regulations that may apply.
ADDITIONAL ITEMS REQUIRED.
1.20 2-stroke engine.
Computer radio with 7 digital 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 each hingefrom thewing panel
and aileron and place a T-pin in the center of
each hinge. Slide each hinge into the aileron
untiltheT-pinis snugagainstthe aileron.This
will help ensure an equal amount of hinge is
oneithersideof thehingeline whentheaileron
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.Agap of 1/64” or less
shouldbe maintainedbetweenthe wingpanel
andaileron.
4)Deflect the aileron and completely
saturate each hinge with thin C/A glue. The
aileronsfront surfaceshouldlightlycontactthe
wing during this procedure. Ideally, when the
Thehinge is 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.
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 SEA 76.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/Agluethat
may have accumulated on the wing or in the
aileronhingearea.
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/Apenetrates into
both the aileron and wing panel.
Aileron control horn: See pictures below.
AILERON CONTROLHORN
Hinge.
C/Aglue.
Worktheaileron up anddown several
times to “work in” the hinges and
check for proper movement.
Note:
2 sets.
3x45mm.

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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.
CONTRONLHORN
M3 SCREW.
16mm.
Epoxy.
Wing
Wing
Rudder control horn:
Usingthesame tectniquesusedaileroncontrol
horn. See picture below.
16mm.
Epoxy.
Horizontal
Stabilizer.
AluminumWasher.
CONTRONL HORN M3
M3LOCKNUT.
Epoxy.
AluminumWasher.
Epoxy.
CONTRONLHORN
M3 SCREW.
ALUMINUMWASHER.
ALUMINUMWASHER.
M3LOCKNUT.
EPOXY.
RUDDER CONTROL HORN.
Rudder control horn.
Rudder.
Fuselage.
2 sets.
3x50mm.
1 sets.
3x50mm.
Elevator.
Horizontal
Stabillizer.
Elevator.

AT-6 TEXAN _ CODE SEA 76.Instruction Manual.
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Rudder control horn.
Remove covering.
M3 x 15mm.
1.5mm.
M3 x 10mm. M3 x 15mm.
Wheelcollar.
Wheel.
Landinggear.
Axle.
20mm.
Epoxy.
Fuselage.Rudder.
66mm.
30mm.
M3 x 4mm.
INSTALLING LANDING GEAR.

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M3 x 10mm.
Remove covering.
M3 x 10mm. M3 x 15mm.
Airtube.
Airtube.
2mm.
Wheel.
WheelFairing.
M3x10mm.
INSTALLING THEAIR RETRACT LANDING
GEAR (PARTS NOT INCLUDED).

AT-6 TEXAN _ CODE SEA 76.Instruction Manual.
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WING ASSEMBLY.
Epoxy.
This side
only.
M3x15mm.
4.5-5mm Diameter Screw.
4.5-5mm Diameter Screw.
Wheelcollar.
Wheel.
Landinggear.
Axle.
WheelFairing.
Wheel.
M4 x 12mm.

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Small weight.
Servos. Thread.
INSTALLING THE AILERON SERVOS.
M3 x 60mm.
M3 x 60mm. This panel
Remove able.
This panel
Remove able.
Aileron
Servo. Aileron
Servo.
Servo electric wire.
String.
Small weight.
Wing rib.
Wing.
Small weight.
String.
Attach the string to the servo lead and carefully thread it through the wing.
Small weight.
String.

AT-6 TEXAN _ CODE SEA 76.Instruction Manual.
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M2locknut.
Wing.
Aileron.
2) Usinga modeling knife,cut onelength
ofsilicon fuelline. Connect oneend ofthe line
tothe weighted fuelpick up andthe other end
to the nylon pick up tube.(The silicon tube is
not included).
Repeat the procedure for the other wing
half.
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.
Aileron.
Wing.
Wing.Aileron.
M2 lock nut.
M2clevis.
110 mm.
75mm.
Aileron.
Wing.
INSTALLATION THE PUSHROD .

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 6) With the stopper assembly in place,
the weighted pickup should rest away from
therearof the tankandmove 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.
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.
FuelFillTube.
Venttube. Fuel Pick up
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.
4) Carefully heat the vent tube using a
heat gun or lighter to permanently set the
angle of the tube.
 7) When satisfied with the alignment of
thestopperassembly tightenthe3mmx20mm
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.
Fuelpick-uptube.
venttube.
Fuelfilltube.
Slide the tankinto thefuselage frominsideso
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.
Attach the silicone fuel and pressure pipes
tothe tank.The lowerpipe isthe ‘feed’and the
upper two the ‘pressure and fill’. The fill pipe
is the next pipe.
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 maybedifficult to determine
which is which.
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.
Balsa block.
Fueltank.

AT-6 TEXAN _ CODE SEA 76.Instruction Manual.
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INSTALLING THE FUSELAGE SERVOS.
Elevator. Elevator.
Rudder.
Rudder.
Elevator.
Switch.
ThrottleServo.
 2)Using a 3/32”drill bit,drill a holethrough
the side of the fuselage, opposite the muffler,
even with the switch.
 3)Make apush-pull leverout ofscrapwire.
Attach the wire to the switch lever and route
the wire out the side of the fuselage, through
theholeyou drilled.
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.
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.
3/32” Hole.
Switch.

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INSTALLINGTHE HORIZONTALSTABILIZER.
M3 x 25mm.
M3 x 25mm.
Hingeslot.
Hingeslot.
Remove the covering.
Fillepoxy.
Remove the covering.
Hingeslot.

AT-6 TEXAN _ CODE SEA 76.Instruction Manual.
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Hinge. Covering strip.
C/Aglue.
Epoxy.
Epoxy.
Fillepoxy.
Maskingtape.
3 x 70mm.
90º
Vertical
Stabilizer.
Horizontal
Stabilizer.

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M2 Lock nut.
M2clevis.
Attach to servo arm in fuselage. Attach to elevator - rudder control horn.
Elevator and rudder pushrods assembly follow pictures below.
Elevator control horn.
Rudder control horn.
ELEVATOR - RUDDER PUSHROD INSTALLATION.
Elevator2.
Elevator2.
Elevator1.
Rudder.
16 mm.
Servo arm.
Rudder.
Throttle.
Elevator1.

AT-6 TEXAN _ CODE SEA 76.Instruction Manual.
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Machine Screw 4 x 30mm.
Pushrod wire.
ThrottleServo.
THROTTLE SERVO ARM INSTALLATION.
Installadjustableservoconnectorinthe servo
arm .
AdjustableServo
connector.
Servoarm.
Loctite secure.
1PCS.
Rudder pushrod.
Elevator pushrod.
Elevator pushrod.
Rudder pushrod.
MOUNTING THE ENGINE.
155 mm.
4.2 mm diameter.

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INSTALLING THE BATTERY
Battery.
Tie wrap.
Trim and cut.
COWLING.
Silicon
glue.
Cowling.
Dummy
Engine.
Dummy
Engine.
Dummy
Engine.
Cowl.
Trim and cut.
Machine Screw M3 x 10mm.
Trim and cut.

AT-6 TEXAN _ CODE SEA 76.Instruction Manual.
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Removing the covering.
Epoxy.
Optionalpart2.
C/Aglue.
Machine Screw M3 x10mm.
Optionalpart1.

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M3x30mm.
MOUNTING THE TAIL WHEEL.
Seepicturebelow.
M3x25 mm.
Aluminum tail
landing gear.
M3 x 30mm.
22mm.
100 mm. 200 mm.
INSTALLATION PILOT.
Tail landinggear.
Spring.
M2 x 6mm.

AT-6 TEXAN _ CODE SEA 76.Instruction Manual.
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M2 x 6mm.
 1) Plug the seven 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.
3) Routethe antennain the antennatube
inside the fuselage and secure it to the bot-
tom of fuselage using a plastic tape.
INSTALLING THE RECEIVER.
C/Aglue.
Air tank.