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ASSEMBLY MANUAL
AT-6 TEXAN _ CODE SEA 76. Instruction Manual.
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INTRODUCTION.
Thank you for choosing the AT-6 TEXAN ARTF by SEAGULL MODELS. The AT-6 TEXAN wasdesigned with the intermediate/advanced flyer in mind. It is a semi scale airplane which is easy tofly and quick to assemble. The airframe is conventionally built using balsa, plywood to make itstronger than the average ARTF , yet the design allows the aeroplane to be kept light. You will findthat most of the work has been done for you already.The motor mount has been fitted and the hingesare 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 thismanual thoroughly before starting assembly of your AT-6 TEXAN . Use the parts listing below toidentify all parts.
WARNING.
Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it iscapable of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE YOUASSUME ALL RISK & RESPONSIBILITY.
If you are inexperienced with basic R/C flight we strongly recommend you contact your R/C supplierand join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of trainingprocedures designed to help the new pilot on his way to successful R/C flight. They will also be ableto 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.� Silicone fuel line.
TOOLS & SUPPLIES NEEDED.
� Thick cyanoacrylate glue.� 30 minute epoxy.� 5 minute epoxy.� Hand or electric drill.� Assorted drill bits.� Modelling knife.� 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/ elevatorhalves.
� (1) Rudder halves.
Some more parts.
HARDWARE PACK
COWLINGLanding gear.....
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NOTE: To avoid scratching your new aero-plane we suggest that you cover yourworkbench with an old towel. Keep acouple of jars or bowls handy to holdthe small parts after you open thebags.
Please trial fit all parts. Make sure youhave the correct parts and that theyfit and are aligned properly beforegluing! This will ensure proper as-sembly as the AT-6 TEXAN is madefrom natural materials and minor ad-justments may have to be made. Thepaint and plastic parts used in this kitare fuel proof. However, they are nottolerant of many harsh chemicals in-cluding the following: paint thinner,cyano-acrylate glue accelerator, cy-anoacrylate glue de-bonder andacetone. Do not let these chemicalscome in contact with the colours onthe covering and the plastic parts.
The control surfaces, including theailerons, elevators, and rudder, areprehinged with hinges installed, butthe hinges are not glued in place. Itis imperative that you properlyadhere the hinges in place per thesteps that follow using a high-qualitythin C/A glue.
� 1) Carefully remove the aileron from oneof the wing panels. Note the position of thehinges.
� 2) Remove each hinge from the wing paneland aileron and place a T-pin in the center ofeach hinge. Slide each hinge into the aileronuntil the T-pin is snug against the aileron. Thiswill help ensure an equal amount of hinge ison either side of the hinge line when the aileronis mounted to the wing panel.
HINGING THE AILERONS.
Note:
Hinge.
T-pin.
� 3) Slide the aileron on the wing panel untilthere is only a slight gap. The hinge is nowcentered on the wing panel and aileron.Remove the T-pins and snug the aileronagainst the wing panel. A gap of 1/64” or lessshould be maintained between the wing paneland aileron.
� 4)Deflect the aileron and completelysaturate each hinge with thin C/A glue. Theailerons front surface should lightly contact thewing during this procedure. Ideally, when the
The hinge is constructed of a specialmaterial that allows the C/A to wickor penetrate and distributethroughout the hinge, securelybonding it to the wood structure ofthe wing panel and aileron.
hinges are glued in place, a 1/64” gap or lesswill be maintained throughout the lengh of theaileron 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 thesame tectniques used to hinge the ailerons.
HINGING THE RUDDER.
Glue the rudder hinges in place using thesame tectniques used to hinge the ailerons.
� 8) After both ailerons are securely hinged,firmly grasp the wing panel and aileron tomake sure the hinges are securely glued andcannot be pulled out. Do this by carefullyapplying medium pressure, trying to separatethe aileron from the wing panel. Use cautionnot to crush the wing structure.
� 7) Repeat this process with the other wingpanel, securely hinging the aileron in place.
� 6) Using C/A remover/debonder and apaper towel, remove any excess C/A glue thatmay have accumulated on the wing or in theaileron hinge area.
� 5) Turn the wing panel over and deflect theaileron in the opposite direction from theopposite side. Apply thin C/A glue to eachhinge, making sure that the C/A penetrates intoboth the aileron and wing panel.
Aileron control horn: See pictures below.
AILERON CONTROL HORN
Hinge.
C/A glue.
Work the aileron up and down severaltimes to “work in” the hinges andcheck for proper movement.
Note:
2 sets.
3x45mm.
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Install the elevator control horn using thesame method as with the aileron controlhorns.
ELEVATOR CONTROL HORN.
M3 LOCK NUT.
ALUMINUM WASHER.
ALUMINUM WASHER.
CONTRONL HORN M3 SCREW.
16mm.
Epoxy.
Wing
Wing
Rudder control horn:Using the same tectniques used aileron controlhorn. See picture below.
16mm.
Epoxy.
HorizontalStabilizer.
Aluminum Washer.
CONTRONL HORN M3
M3 LOCK NUT.
Epoxy.
Aluminum Washer.
Epoxy.
CONTRONL HORN M3 SCREW.
ALUMINUM WASHER.
ALUMINUM WASHER.
M3 LOCK NUT.
EPOXY.
RUDDER CONTROL HORN.
Rudder control horn.
Rudder.Fuselage.
2 sets.
3x50mm.
1 sets.
3x50mm.
Elevator.HorizontalStabillizer.
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.
Wheel collar.
Wheel.
Landing gear.
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.
Air tube.
Air tube.
2mm.
Wheel.
Wheel Fairing.
M3x10mm.
INSTALLING THE AIR RETRACT LANDINGGEAR (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.
Wheel collar.
Wheel.
Landing gear.
Axle.
Wheel Fairing.Wheel.
M4 x 12mm.
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Small weight.
Servos.Thread.
INSTALLING THE AILERON SERVOS.
M3 x 60mm.
M3 x 60mm. This panelRemove able.
This panelRemove 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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M2 lock nut.
Wing.
Aileron.
� 2) Using a modeling knife, cut one lengthof silicon fuel line. Connect one end of the lineto the weighted fuel pick up and the other endto the nylon pick up tube.(The silicon tube isnot included).
Repeat the procedure for the other winghalf.
� 1) Using a modeling knife, carefully cutoff the rear portion of one of the 3 nylon tubesleaving 1/2” protruding from the rear of thestopper. This will be the fuel pick up tube.
INSTALLING THE STOPPER ASSEMBLY.
�3) Carefully bend the second nylon tube upat a 45º angle. This tube is the vent tube.
Aileron.
Wing.
Wing. Aileron.
M2 lock nut.M2 clevis.
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 fromthe rear of the tank and move freely inside thetank. The top of the vent tube should rest justbelow the top of the tank. It should not touchthe top of the tank.
When the stopper assembly is in-stalled in the tank, the top of the vent tubeshould rest just below the top surface ofthe tank. It should not touch the top of thetank.
Fuel Fill Tube.
Vent tube. Fuel Pick upTube.
� 5) Test fit the stopper assembly into thetank. It may be necessary to remove some ofthe flashing around the tank opening using amodeling knife. If flashing is present, makesure none falls into the tank.
� 4) Carefully heat the vent tube using aheat gun or lighter to permanently set theangle of the tube.
� 7) When satisfied with the alignment ofthe stopper assembly tighten the 3mm x 20mmmachine screw until the rubber stopper ex-pands and seals the tank opening. Do notovertighten the assembly as this could causethe tank to split.
Fuel pick-up tube.
vent tube.
Fuel fill tube.
Slide the tank into the fuselage from inside sothat the neck is at the top of the fuselage andit locates through the engine bulkhead. Gentlysecure it to the top horizontal former with acable tie.
Attach the silicone fuel and pressure pipesto the tank. The lower pipe is the ‘feed’ and theupper two the ‘pressure and fill’. The fill pipeis the next pipe.
You should mark which tube is thevent and which is the fuel pickup when youattach fuel tubing to the tubes in thestopper. Once the tank is installed insidethe fuselage, it may be difficult to determinewhich is which.
Blow through one of the lines to en-sure the fuel lines have not become kinkedinside the fuel tank compartment. Airshould flow through easily.
C/A glue attached.
Balsa block.
Fuel tank.
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INSTALLING THE FUSELAGE SERVOS.
Elevator. Elevator.
Rudder.
Rudder.
Elevator.
Switch.
Throttle Servo.
� 2) Using a 3/32” drill bit, drill a hole throughthe side of the fuselage, opposite the muffler,even with the switch.� 3) Make a push-pull lever out of scrap wire.Attach the wire to the switch lever and routethe wire out the side of the fuselage, throughthe hole you drilled.
Some switches come with a holedrilled through the switch tab for this verypurpose. If your switch does not, removethe switch and drill a 3/32” hole throughthe middle of the switch tab.
INSTALLING THE SWITCH.
� 1) Install the switch into the precut hole inthe servo tray, in the fuselage, from the bot-tom. Use the two screws provided with theswitch to secure it in place. Drill two 3/32”holes through the tray for the screws to passthrough.
3/ 32” Hole.
Switch.
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INSTALLING THE HORIZONTAL STABILIZER.
M3 x 25mm.
M3 x 25mm.
Hinge slot.Hinge slot.
Remove the covering.
Fill epoxy.
Remove the covering.
Hinge slot.
AT-6 TEXAN _ CODE SEA 76. Instruction Manual.
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Hinge. Covering strip.
C/A glue.
Epoxy.
Epoxy.
Fill epoxy.
Masking tape.
3 x 70mm.
90º
VerticalStabilizer.Horizontal
Stabilizer.
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M2 Lock nut.M2 clevis.
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.
Elevator 2.
Elevator 2.
Elevator 1.
Rudder.
16 mm.
Servo arm.
Rudder.
Throttle.
Elevator 1.
AT-6 TEXAN _ CODE SEA 76. Instruction Manual.
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Machine Screw 4 x 30mm.
Pushrod wire.
Throttle Servo.
THROTTLE SERVO ARM INSTALLATION.
Install adjustable servo connector in the servoarm .
Adjustable Servo connector.
Servo arm.
Loctite secure.
1 PCS.
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.
Optional part 2.
C/A glue.
Machine Screw M3 x10mm.
Optional part 1.
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M3x30mm.
MOUNTING THE TAIL WHEEL.
See picture below.
M3x25 mm.
Aluminum tail landing gear.
M3 x 30mm.
22mm.
100 mm. 200 mm.
INSTALLATION PILOT.
Tail landing gear.
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 theswitch lead into the receiver. Plug the batterypack lead into the switch also.� 2) Wrap the receiver and battery pack inthe protective foam rubber to protect themfrom vibration.
� 3) Route the antenna in the antenna tubeinside the fuselage and secure it to the bot-tom of fuselage using a plastic tape.
INSTALLING THE RECEIVER.
C/A glue.
Air tank.
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Antenna.
ATTACHMENT WING-FUSELAGE.
Bolt the to fuselage.See pictures below.
Receiver.
M3 x 10mm.
Wing bolt.
C/A glue.
� 2) Turn on the radio system, and with thetrim tabs on the transmitter in neutral, centerthe control surfaces by making adjustmentsto the clevises or adjustable servo connectors.The servo arms should be centered also.
CONTROL THROWS.
� 1) We highly recommend setting up theAT-6 TEXAN using the control throws listedat right. We have listed control throws for bothLow Rate (initial test flying/sport flying) andHigh Rate (aerobatic flying).
130mm.
BALANCING.
� 1) It is critical that your airplane be bal-anced correctly. Improper balance will causeyour plane to lose control and crash. The cen-ter of gravity is shown in picture below.
� 2) If the nose of the plane falls, the planeis nose heavy. To correct this first move thebattery pack further back in the fuselage. Ifthis is not possible or does not correct it, sticksmall amounts of lead weight on the fuselagesides under the horizontal stabilizer. If the tailof the plane falls, the plane is tail heavy.
To correct this, move the battery and receiverforward orif this is not possible, stick weightonto the firewall or use a brass heavy hub spin-ner hub. When balanced correctly, the airplaneshould sit level or slightly nose down when youlift it up with your fingers.
CG.
AT-6 TEXAN _ CODE SEA 76. Instruction Manual.
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� C) Check the rudder. Looking frombehind the airplane, move the rudder stick tothe right. The rudder should move to the right.If it does not, flip the servo reversing switch onyour transmitter to change the direction.
� E) From behind the airplane, look atthe aileron on the right wing half. Move theaileron stick to the right. The right aileronshould move up and the other aileron shouldmove down. If it does not, flip the servo re-versing switch on your transmitter to changethe direction.
� A) Plug in your radio system per themanufacturer's instructions and turn every-thing on.
� B) Check the elevator first. Pull backon the elevator stick. The elevator halvesshould move up. If it they do not, flip the servoreversing switch on your transmitter to changethe direction.
Check the operation and direction of theelevator, rudder, ailerons and throttle.
FLIGHT PREPARATION.
AEROBATIC FLYING
INITIAL FLYING
� 4) By moving the position of the adjust-able control horn out from the control surface,you will decrease the amount of throw of thatcontrol surface. Moving the adjustable con-trol horn toward the control surface will in-crease the amount of throw.
� 3) When the elevator, rudder and aileroncontrol surfaces are centered, use a ruler andcheck the amount of the control throw in eachsurface. The control throws should bemeasured at the widest point of each sur-face!
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� 3) Double check the balance of the air-plane. Do this with the fuel tank empty.
� 4) Check the control surfaces. All shouldmove in the correct direction and not bind inany way.
� 5) If your radio transmitter is equippedwith dual rate switches double check that theyare on the low rate setting for your first fewflights.
� 2) Check every bolt and every glue jointin the AT-6 TEXAN to ensure that everythingis tight and well bonded.
� 1) Completely charge your transmitterand receiver batteries before your first day offlying.
PREFLIGHT CHECK.
� D) Check the throttle. Moving thethrottle stick forward should open the carbu-retor barrel. If it does not, flip the servo re-versing switch on your transmitter to changethe direction.
� 7) Check the receiver antenna. It shouldbe fully extended and not coiled up inside thefuselage.
� 6) Check to ensure the control surfacesare moving the proper amount for both lowand high rate settings.
� 8) Properly balance the propeller. An outof balance propeller will cause excessive vi-bration which could lead to engine and/or air-frame failure.
We wish you many safe and enjoy-able flights with your AT-6 TEXAN.
