Seagull Models AT 6 TEXAN User manual

TheAT-6 advanced trainer was one of the most widely used aircraft in history. Evolving from
the BC-1 basic combat trainer ordered in 1937, 15,495 Texans were built between 1938 and 1945.
The USAAF procured 10,057 AT-6’s, others went to the Navy as SNJ’s and to more than 30 Allied
nations. MostAAF fighter pilots trained inAT-6’s prior to graduation from flying school. Many of the
“Spitfire” and “Hurricane” pilots in the Battle of Britain trained in Canada in “Harvards,” the British
versionoftheAT-6. To comply with neutrality laws, U.S. built Harvards were flown north to the border
and were pushed across.
In 1948, Texans still in USAF service were redesignated as T-6’s when the AT, BT, and PT
aircraftdesignations were abandoned. Tomeetanurgentneedforcloseairsupportofgroundforces
in the Korean Conflict, T-6’s flew “mosquito missions” spotting enemy troops and guns and marking
them with smoke rockets for attack by fighter-bombers.
The new Seagull Models AT-6 Texan ARF is the perfect standoff scale 40 size sport ARF of
this classic design. Construction is of light ply and balsa built by expert craftsmen and covered in the
classic white, yellow and red color scheme, with a complete decal set. What really sets this AT-6
apart from others is it's prepainted fiberglass cowl, true to scale round fuselage and a completely
prefabricated and hand painted cockpit which includes two instrument panels and two pilots! All of
the hardware that you need can be found in the box also. Fuel tank, wheels, tail wheel assembly,
prebuilt pushrods and more. Even foam rubber to protect your receiver and battery pack is included.
We are sure that you'll agree this is the best built, and the best flying sport scaleAT-6ARF available
anywhere!
Madein Vietnam.
AT 6 - TEXAN
Specifications:
Wingspan-----------------------------------------62in------------------------158.5cm.
Wingarea--------------------------------626.5sq.in-------------------40.42sq.dm.
Approximateflyingweight-------------6.2-7.7lbs-----------------------2.8-3.5kg.
Length-------------------------------------------50.4in---------------------------128cm.
Recommendedenginesize-------.46-.52cu.in--------------------------2-stroke.
------- .72-.82 cu.in----------------------- 4-stroke.
ASSEMBLY MANUAL

AT 6 - TEXAN. 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
that most of the work has been done for you already.
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 helpthe newpilot onhis waytosuccessfulR/Cflight.Theywillalsobe able
to advise on any insurance and safety regulations that may apply.
ADDITIONAL ITEMS REQUIRED.
.46-.52 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
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 with pre-installed
aileron
(1) Left wing half with pre-installed
aileron
(1)Midle wing
Tail section assembly
(1) Vertical stabilizer with pre-
installedrudder
(1) Horizontal stabilizer with pre-
installed elevator halves
Some more parts.
HARDWAREPACK
COWLING
Landing gear.....

AT 6 - TEXAN. Instruction Manual.
3
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 AT6-TEXANismade
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. Donotlet these chemi-
calscomein contact with the colours
onthe coveringandthe plastic parts.

AT 6 - TEXAN. Instruction Manual.
4
There are 2 options for colour scheme of AT 6:
1. One is standard colours (White and yellow).
2. One isAustralia colour scheme (Yellow). WithAustralia colour scheme for AT 6, you should
use black pen (fuel proof) to draw the panel lines on the air plane as same as pictures below:
Pen.

AT 6 - TEXAN. Instruction Manual.
5
C/Aglue.

AT 6 - TEXAN. Instruction Manual.
6
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
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 control surfaces, including the
ailerons, elevators, and rudder, are
prehinged with hinges installed, but the
hinges are not glued in place. It is
imperativethatyou properly adhere the
hingesinplaceperthe steps that follow
usingahigh-qualitythinC/Aglue.
1) Carefully remove the aileron from one
of the wing panels. Note the position of the
hinges.
2)Remove each hinge from the wing panel
and aileron and place a T-pin in the center of
each hinge. Slide each hinge into the aileron
untiltheT-pin is snug against the aileron.This
will help ensure an equal amount of hinge is
oneithersideofthehingelinewhentheaileron
is mounted to the wing panel.
HINGING THE AILERONS.
Note:
The hinge is constructed of a special
material that allows the C/A to wick or
penetrateand distributethroughoutthe
hinge, securely bonding it to the wood
structureof the wing panel and aileron.
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 maintained between the wing panel
andaileron.
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.
C/Aglue.
C/Aglue.

AT 6 - TEXAN. Instruction Manual.
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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.
Note:Work the aileron up and down several
times to “work in” the hinges and check
for proper movement.
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 any excess C/Agluethat
may have accumulated on the wing or in the
aileronhingearea.
Repeat the procedure for the other wing
half.
INSTALLING THE MAIN GEAR WIRES
MAIN LANDING GEAR
INSTALLATION ( OPTION I ).
 1) Usingamodeling knife, remove the cov-
ering from over the two main gear mounting
slots located in the bottom of the wing. One
slot is located in each wing half.
 2) Insert the 90º bend of one main gear
wire into the predrilled hole in one mounting
slot.
 3) The landing gear wire is held in place
using two nylon landing gear straps and four
3mm x 12mm wood screws.
NOTE: The straps should be located equal
distance from the inside and outside ends of
the wire.
 4) Using the two landing gear straps as a
guide, mark the locations of the four 3mm x
12mm mounting screws onto the wing sur-
face.
 5) Remove the two straps and the gear
wire. Drill four 1mm pilot holes into the wing
for the wood screws.
Be careful not to drill through the top of
the wing!
3mm x 12mm.
Remove covering.

AT 6 - TEXAN. Instruction Manual.
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 6) Reinstall the gear wire and install the
straps using the four 3mm x 12mm wood
screws. Tighten the screws completely to
secure the gear wire in place.
INSTALLINGTHEMAIN GEAR WHEELS.
3mm x 12mm.
Repeat the procedure for the other wing
half.
2X8mm.
Plywood.
2X8mm.
Cut.
Sanding.

AT 6 - TEXAN. Instruction Manual.
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INSTALLINGRETRACTABLE
LANDING GEAR ( OPTION II ).
Remove covering.
Metalclevis.
Pushrod. M2 clock.
1mm screw bit.
Remove covering.
Electric wire
exit.
Metalconnector.
Servo for retractable only.
Servo arm.
Pre-intalledwithoutglue.
15 mm. 15 mm.
Trim and cut.

AT 6 - TEXAN. Instruction Manual.
10
3mm x 12mm.
C/Aglue.
Plastic gear cover.
Trim and
cut.

AT 6 - TEXAN. Instruction Manual.
11
WING ASSEMBLY.
NOTE:We highly recommend using 30
minute epoxy as it is stronger and
providesmoreworkingtime,allowing
thebuildertoproperlyaligntheparts.
Using fast cure epoxy when joining
the wing halves could result in the
gluedryingbeforethewinghalvesare
aligned properly which may result in
failure of the wing centre section
duringflight.
1)Locate theplywoodwing dihedralbrace.
Using a ruler, locate its centre and draw a
vertical line .
 2)Testfitthedihedralbraceintoeachwing
half. 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.
Centreline.
 3) Remove the brace when satisfied
withits fit in each wing half. Coat both sides of
one half of the dihedral brace with 30 minute
epoxy.Next,poursomeepoxyintothedihedral
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.
4) Carefully slide the two wing halves
together and firmly press them together,
allowing the excess epoxy to run out. There
shouldnotbeanygap in the wing halves. Use
rubbingalcohol and a paper tower to clean up
any excess epoxy.
5) Apply masking tape at the wing join to
hold the wing halves together securely.
Epoxy.
Maskingtape.

AT 6 - TEXAN. Instruction Manual.
12
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.
INSTALLING THE AILERON SERVOS.
Using a small weight (Weighted fuel pick-up
workswell)andthread, feedthestring through
the wing as indicated.
Servo.
Thread.
Small weight.
Wing bottom.
Small weight.
Thread.
Attacha servolead tothe aileronservo.Attach
thestring totheservoleadand carefullythread
it though the wing. Once you have thread the
leadthrought the wing, remove the string so it
canusefortheotherservolead.Tapethe servo
lead to the wing to prevent it from falling back
into the wing.
Electric wire.
1) Install the rubber grommets and brass
colletsontothe aileronservo. Testfitthe servo
into the aileron servo mount.
We recommended to use long ser-
vosarm for all servos without throttle
servo.
Thread.

AT 6 - TEXAN. Instruction Manual.
13
2) Install the aileron servo mount into the
wing, with the output shaft towards the lead-
ing edge of the wing.
Repeat the procedure for the other wing
half.
 2) Locate the nylon control horns,nylon
control horn backplates and two machine
screws.
AILERON LINKAGE.
INSTALLINGTHEAILERON LINKAGE.
1) Using a ruler & pen to draw a straight
line as below picture.
 3) Position the aileron horn on the bottom
side of aileron. The clevis attachment holes
should be positioned over the hinge line.
 4) Using a 1.5mm drill bit and the control
horns as a guide, drill the mounting holes
through the aileron halves.
 6)Threadonenylon adjustablecontrolhorn
on to each aileron control rod. Thread the
horns on until they are flush with the ends of
the control rods.

5)Mount the control horns by inserting the
bolts through the control horn bases and
aileron halves, then into the mounting
backplates. Do not overtighten the nuts or the
backplates may crush the wood.
Straight line.
Pen.
Plastic tape.
(2) 2mm x 20mm.
ControlHorn.
MountingScrews. MountingPlate.
2 X 20 mm.

AT 6 - TEXAN. Instruction Manual.
14
FUEL TANK.
INSTALLING THE STOPPERASSEMBLY.
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. Connect one endofthe line to
the weighted fuel pickup and the other end to
the nylon pickup tube.
Snapkeepper.
INSTALLING THE ENGINE MOUNT.
See pictures below:
M2 lock nut. Snapkeepper.
Markpoint.
Pen.
Cut.
Repeat the procedure for the other wing
half.
4mmX20mm.

AT 6 - TEXAN. Instruction Manual.
15
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.
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 pickup should rest away from the
rearofthetankandmovefreelyinsidethe tank.
Thetop 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 3mm 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.
Slide the tank into the fuselage from inside so
that the neck is at the top of the fuselage and
itlocates through the engine bulkhead.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 the fuselage, it may be
difficult to determine which is which.
Attach the silicone fuel and pressure pipes to
the tank. The lower pipe is the ‘feed’ and the
upper two the ‘pressure and fill’. The fill pipe
is the next pipe.
Vent tube.
Fuelfilltube.
Fuel pickup tube. Fueltank.
3) Carefully bend the second nylon tube up
at a 45º angle. This tube is the vent tube.

AT 6 - TEXAN. Instruction Manual.
16
Blow through one of the lines to ensure
thefuel lines have not become kinked in-
sidethefuel tankcompartment. Airshouldflow
througheasily.
MOUNTING THE ENGINE.
PARTS REQUIRED
Vent tube.
Fuelfill
tube.
Fuelpickup
tube.
Hard wood block.
3mm X 30mm.
2.5mm.
3 X 30 mm.
 1) Install the pushrod housing through the
predrilledhole in thefirewalland intotheservo
compartment. The pushrod housing should
protrude 1/4" out past the front of the firewall.
Make a Z-Bend 1/4" from one end of the plain
wire pushrod.
 2) Place your engine onto the engine
mount. Adjust the engine is centered of the
edges of the engine case.
 4) Remove the engine. Using an drill bit,
drill the mounting holes through the engine
mount at the four locations marked.
 5) Bolt the engine to the engine mount
using the four machine screws. Double
cheek that all the screws are tight before
proceeding.
 6). Attach the Z-Bend in the pushrod wire
to the throttle arm on the carburetor. You will
need to remove the throttle arm from the car-
buretor to be able to attach the Z-bend. When
complete, reattach the throttle arm to the car-
buretor.
 3) When you are satisfied with the align-
ment, mark the locations of the engine
mounting.
110 mm.

AT 6 - TEXAN. Instruction Manual.
17
 3) Install the muffler and muffler extension
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 3mmx12mm screws.
1)Slidethe fiberglass cowloverthe engine
and line up the back edge of the cowl with the
marks you made on the fuselage.
 2) While keeping the back edge of the
cowl flush with the marks, align the front of
thecowlwiththe crankshaftof theengine. 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.
Because of the size of the cowl, it may
benecessarytouseaneedlevalveextension
forthe high speedneedle valve. Make thisout
of sufficient length 1.5mm wire and install it
into the end of the needle valve. Secure the
wireinplacebytighteningtheset screw in the
side of the needle valve.
COWLING.
Trim and cut.
Trim and cut.
Pushrod wire.

AT 6 - TEXAN. Instruction Manual.
18
Installthespinnerbackplate,propellerand
spinner cone. The spinner cone is held in
place using two 3mm x 12mm wood screws.
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 AIR SCOOP.
1) Using a modeling knife carefully cut out
theplasticair scoop along the outside edge of
the molded radius. Leave about a 3/32” rim
around the perimeter to use as a gluing sur-
face.
2)Using 220 grit sandpaper with a sanding
block, carefully sand the edges of the scoop
smooth. Also lightly sand the gluing surface
of the scoop to roughen the plastic.
AirScoop
3/32”
Rim Remove
Forward
Portion
3)The scoop is located on the left side of
the fuselage. The front of the scoop should
be up against the rear edge of the cowl and
the bottom edge of the scoop should be even
with the cowl mounting screw.
4)Glue the scoop in place on the fuselage
side using Kwik Bond Thick C/A. Hold the
scoop securely until the glue cures.
INSTALLING THE SPINNER.
1.5mm wire
(needlevalve).
3mmX12mm.

AT 6 - TEXAN. Instruction Manual.
19
3/32” Hole.
 4 ) Install the rubber grommets and brass
collets onto the elevator, rudder and throttle
servos. Test fit theservosintothe preinstalled
servo tray. Because the size of servos dif-
fer, you may need to adjust the size of the
precut openings in the tray.
 5) Position the servos into the servo tray
with the output shafts orientated as shown
below. Drill 1/16” pilot holes through the tray
for each of the mounting screws.
Some switches come with a hole drilled
through the switch tab for this very pur-
pose. If your switch does not, remove the
switchand drilla3/32” holethroughthe middle
of the switch tab.
 2) Using a 3/32” drillbit,drillaholethrough
the side of the fuselage, opposite the muffler,
even with the switch.
 3)Make a push-pull leveroutof scrap wire.
Attach the wire to the switch lever and route
the wire out the side of the fuselage, through
thehole you drilled.
INSTALLING THE FUSELAGE SERVOS.
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.
1) Carefully remove the elevator from one
of the horizontal stabilizer panels. Note the
position of the hinges.
2) Remove each hinge from the horizontal
stabilizerpaneland elevator and place aT-pin
in the center of each hinge. Slide each hinge
intotheelevatoruntiltheT-pin is snug against
the elevator. This will help ensure an equal
amount of hinge is on either side of the hinge
line when the elevator is mounted to the
horizontal stabilizer panel.
Elevator.
Rudder.
Elevator.
Switch. Throttle.
HINGING THE ELEVATORS.
3) Slide the elevator on the horizontal
stabilizer panel until there is only a slight gap.
The hinge is now centered on the horizontal
stabilizer panel and elevator. Remove the T-
pins and snug the elevator against the
horizontal stabilizer panel. A gap of 1/64” or
less should be maintained between the
horizontal stabilizer panel and elevator.

AT 6 - TEXAN. Instruction Manual.
20
3) Slidethe stabilizerinto placein thepre-
cut slot in the rear of the fuselage. The stabi-
lizer should be pushed firmly against the front
of the slot.
Remove covering.
4)Deflect the elevator and completely
saturate each hinge with thin C/A glue. The
elevators front surface should lightly contact
thehorizontal stabilizer during this procedure.
Ideally, when the hinges are glued in place, a
1/64”gaporless willbe maintainedthroughout
the lengh of the elevator to the horizontal
stabilizer panel hinge line.
The hinge is constructed of a special
material that allows the C/A to wick or
penetrateand distributethroughoutthe
hinge, securely bonding it to the wood
structure of the horizontal stabilizer
paneland elevator.
C/Aglue.
6) Using C/A remover/debonder and a
papertowel, remove any excess C/Agluethat
may have accumulated on the horizontal
stabilizer or in the elevator hinge area.
8)Afterboth elevators are securely hinged,
firmlygrasp the horizontal stabilizer panel and
elevatortomakesure the hinges are securely
glued and cannot be pulled out. Do this by
carefully applying medium pressure, trying to
separate the elevator from the horizontal
stabilizer panel. Use caution not to crush the
horizontal stabilizer structure.
7) Repeat this process with the other
horizontalstabilizerpanel, securelyhinging the
elevator in place.
5) Turn the horizontal stabilizer panel over
and deflect the elevator in the opposite
directionfrom the opposite side.Apply thin CA
glue to each hinge, making sure that the C/A
penetratesintoboththeelevatorand horizontal
stabilizer panel.
C/Aglue.
1) Using a ruler and a pen, locate the
centerlineofthehorizontalstabilizer,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
thismarkdownthebackofthe trailing edge of
the stabilizer.
2) Using a modeling knife, carefully re-
movethe covering atmountingslot of horizon-
tal stabilizer ( both side of fuselage).
HORIZONTAL STABILIZER.
Note:
Center line.