AT-6 25e Texan ARF Assembly Manual Specifications Wingspan: Length: Wing Area: Weight w/ Battery: Weight w/o Battery: 54 in (1370mm) 39 in (990mm) 455 sq in (29.35 sq dm) 3.9–4.5 lb (1.8–2.0 kg) 3–3.25 oz (1.4–1.
Table of Contents Specifications....................................................................... 1 Introduction.......................................................................... 2 Using the Manual................................................................. 2 Contents of Kit/Parts Layout.................................................. 3 Required Radio Equipment.................................................... 3 Important Information About Motor Selection.........................
Contents of Kit/Parts Layout EFL4501 EFL4501C EFL4501L EFL4501R EFL4502 EFL4503 EFL4503D EFL4503L EFL4503R EFL4504 EFL4505 EFL4506 EFL4507 EFL4508 EFL4509 EFL4510 EFL4511 EFLA150 Wing Set Main Wing Left Wing Right Wing Fuselage Tail Set Rudder Left Stab Right Stab Landing Gear Cowling Canopy Pushrod Set Battery Hatch Wing Tube Stab Tube Air Inlet Scoop Set Pilot Figure Required Radio Equipment You will need a minimum 6-channel transmitter (for proper mixing and dual rate capabilities), crystals, micro rec
Important Information About Motor Selection We recommend the E-flite® Power 25 Brushless Outrunner, 870Kv (EFLM4025A) for sport performance. Outrunner Setup EFLM4025A Power 25 BL Outrunner, 870Kv EFLA1060 60-Amp Brushless ESC THP42003S2PPL 4200mAh 3-Cell 11.
Notes Regarding Servos and ESC Limited Warranty WARNING: Use of servos other than those we recommend may overload the BEC of the recommended Electronic Speed Control (ESC). We suggest the use of only the servos we recommend when utilizing the recommended ESC’s BEC, or the use of a separate BEC (like the UBEC) or receiver battery pack when using other servos. (a) This warranty is limited to the original Purchaser ("Purchaser") and is not transferable.
Damage Limits Questions, Assistance, and Repairs HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCT, WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT LIABILITY. Further, in no event shall the liability of Horizon exceed the individual price of the Product on which liability is asserted.
Non-Warranty Repairs Should your repair not be covered by warranty the repair will be completed and payment will be required without notification or estimate of the expense unless the expense exceeds 50% of the retail purchase cost. By submitting the item for repair you are agreeing to payment of the repair without notification. Repair estimates are available upon request. You must include this request with your repair. Non-warranty repair estimates will be billed a minimum of ½ hour of labor.
Stabilizer Installation 2. Use a drill and 5/64-inch (2mm) drill bit to drill through the hole in the bottom of the stabilizer and into the stabilizer tube. 3. Secure the tube using a 3mm x 10mm self-tapping screw and #1 Phillips screwdriver.
4. Slide the stabilizer and tube in position in the fuselage. Note the direction of the control horn and that it faces the bottom of the fuselage. Slide the remaining stabilizer onto the tube. With both stabilizer halves tight against the fuselage, use a drill and 5/64-inch (2mm) drill bit to drill through the hole in the stabilizer and into the stabilizer tube. E-flite AT-6 Texan ARF Assembly Manual 5.
m 6. Slide a clevis retainer onto a nylon clevis. Thread the clevis onto one of the 20 7/8-inch (530mm) pushrod wires. 8. Repeat Steps 6 and 7 for the remaining elevator pushrod installation m 7. Slide the pushrod wire into the opening in the fuselage that aligns with the stabilizer control horn. Snap the clevis onto the elevator control horn.
9. Slide a clevis retainer onto a nylon clevis. Thread the clevis onto the 21 3/4-inch (553mm) pushrod wire. Slide the pushrod wire into the opening in the fuselage that aligns with the stabilizer control horn. Snap the clevis onto the elevator control horn. E-flite AT-6 Texan ARF Assembly Manual 10. Slide the tail wheel onto the tail gear wire. Use a 1/16-inch wheel collar., setscrew and the included hex wrench to secure the wheel.
Motor Installation Required Parts Fuselage Motor w/mount and accessories #4 washer (4) Cowling Dummy radial engine Radiator scoop (red) Propeller 4-40 x 1/2-inch socket head screw (4) 4-40 x 1/4-inch socket head screw (4) Required Tools and Adhesives Rotary tool w/sanding drum Hobby knife Card stock Felt-tipped pen Drill bit: 1/8-inch (3mm) Medium CA 2. Attach the motor to the firewall using four 4-40 x 1/2-inch socket head screws, four #4 washers and a 3/32-inch ball driver.
3. Use a hobby knife and rotary tool to remove the area in the center of the dummy radial engine. 5. Use 6-minute epoxy to glue the dummy radial engine inside the cowling. 4. Use a hobby knife to remove the area between each of the cylinders to allow cooling air to pass through the cowling and over the motor. 6. Cut four strips of card stock. Make a 1/8-inch (3mm) hole in the end of each strip. Align the hole with the blind nut and use low-tack tape to hold the card stock to the fuselage.
7. Slide the cowling onto the fuselage. The card stock will be on the outside of the cowling. 8. Slide the propeller and adapter onto the motor shaft. Position the cowling so it will not be rubbing on the propeller when the motor is running. Tape the cowling in position on the fuselage. 9. Use a felt-tipped pen to transfer the locations for the 4-40 socket head screws onto the outside of the cowling.
10. Use a pin drill and 1/8-inch (3mm) drill bit to drill the four holes in the cowling for the mounting screws. 11 Slide the cowling back onto the fuselage and secure it using four 4-40 x 1/4-inch socket head screws and a 3/32-inch ball driver. Make sure to use threadlock on the screws to prevent them from vibrating loose. E-flite AT-6 Texan ARF Assembly Manual 12. Use medium CA to glue the radiator scoop to the side of the fuselage behind the cowling.
Main Radio Installation Required Parts Fuselage Servo w/hardware (3) Hook and loop material Receiver Pushrod connector (3) 2. Prepare the rudder and elevator servos for installation by removing any unnecessary arms from the servo horns as shown using side cutters. Install any grommets and brass eyelets at this time as well. Required Tools and Adhesives Thin CA Felt-tipped pen Side cutters Pliers Pin drill Phillips screwdriver: #1 Drill bit: 1/16-inch (1.
mm4. Use a pin drill and 1/16-inch (1.5mm) drill bit to drill the four holes for the servo mounting screws. mm6. Mount the servo using the screws provided with the servo and a #1 Phillips screwdriver. mm5. Apply a few drops of thin CA to each of the holes drilled in the previous step to harden the surrounding wood. E-flite AT-6 Texan ARF Assembly Manual 7. Repeat Steps 3 through 6 to install the remaining elevator servo and rudder servo.
8. Use hook and loop tape to install the receiver in the fuselage following the manufacturer's instructions. A tube has been installed inside the fuselage to route the antenna wire. Do not cut the receiver wire if it extends excessively outside the fuselage as this will greatly reduce the range of your radio system. mm9. Physically center the rudder. Use a felt-tipped pen to mark the rudder pushrod where it crosses the outer hole of the rudder servo arm. mm10.
mm11. Use a 5/64-inch (2mm) drill bit to enlarge the outer hole in the rudder servo arm. Use a #2 Phillips screwdriver to remove screw and the arm from the servo. mm13. Slide the pushrod back into the pushrod tube and thread the clevis back onto the pushrod. With the radio on and the rudder stick and trim centered, secure the servo arm to the servo. Center the rudder by threading the clevis in or out as necessary. mm12.
Aileron Servo Installation Required Parts Outer wing panels (right and left) 3mm x 10mm self-tapping screw (8) 2 1/2-inch (64mm) pushrod wire Pushrod connector (2) 6-inch (152mm) servo extension (2) Servo mounting block 3/4 x 3/8 x 3/8-inch (19 x 9.5 Required Tools and Adhesives Drill 6-minute epoxy Phillips screwdriver: #1 Side cutters Thin CA Servo w/hardware (2) Clevis retainer (2) Clevis (2) m 3. Position the aileron servo on the servo cover so the arm is centered lengthwise in the cutout.
m 5. Position the servo between the servo mounting block. Use a pencil to mark the locations for the servo mounting screws on the blocks. The servo should not touch the cover to prevent it from absorbing vibrations from the airframe. You may have to notch the servo block to allow access for the servo wire. m 6. Use a drill and 1/16-inch (1.5mm) drill bit to drill the holes for the servo mounting screws. E-flite AT-6 Texan ARF Assembly Manual m 7.
m 9. Route the lead from the servo to the opening for the flap servo. Use four 3mm x 10mm self-tapping screws and #1 Phillips screwdriver to secure the servo cover to the wing. m 11. Attach the clevis to the control horn of the aileron. Center the aileron and aileron servo and use a felt-tipped pen to mark where the pushrod crosses the outer hole of the servo horn. m 10. Slide a clevis retainer onto a nylon clevis. Thread the clevis onto one of the 2 1/2-inch (64mm) pushrod wires.
m 12. Use pliers to bend the pushrod 90 degrees at the mark. Use a pushrod connector to secure the pushrod wire to the servo arm. Use side cutters to remove any excess wire. m 13. Secure a 6-inch (152mm) servo extension to the aileron servo lead and route it out the end of the wing panel. E-flite AT-6 Texan ARF Assembly Manual 14. Repeat Steps 3 through 14 for the remaining aileron servo installation.
Flap Servo Installation Outer wing panels (right and left) 3mm x 10mm self-tapping screw (8) 2 7/8-inch (73mm) pushrod wire Pushrod connector (2) Servo mounting block 3/4 x 3/8 x 3/8-inch (19 x 9.5 Servo w/hardware (2) Clevis retainer (2) Clevis (2) x 9.5mm) (4) 2. Prepare the flap servos for installation by removing any unnecessary arms from the servo horns as shown.
m 3. Using a ruler, mark the servo cover as shown using a pencil. m 4. Position the servo so the arm is centered at the intersection of the lines drawn in the previous step. Use a pencil to mark the cover for the servo mounting blocks. E-flite AT-6 Texan ARF Assembly Manual m 5. Use 6-minute epoxy to glue the servo mounting block to the servo cover as shown. Allow the epoxy to fully cure before proceeding.
m 6. Position the servo between the servo mounting blocks. Use a pencil to mark the locations for the servo mounting screws on the blocks. The servo should not touch the cover to prevent it from absorbing vibrations from the airframe. Use a drill and 1/16-inch (1.5mm) drill bit to drill the holes for the servo mounting screws. Apply a few drops of thin CA to each of the holes to harden the surrounding wood.
m 10. Position the flap servo partially in the wing. Connect the clevis to the flap control horn. Plug the flap servo into the receiver and power up the radio system. m 12. Route the servo lead for the flap to the end of the wing panel. Use four 3mm x 10mm self-tapping screws and a #1 Phillips screwdriver to secure the flap servo cover to the wing. Note: Do not place or secure the flap servo cover in position before turning on the radio and checking the operation of the flap.
Fixed Landing Gear Installation Required Parts Wing center section Landing gear (right and left) 1/8-inch wheel collar (4) 3mm x 4mm machine screw (2) 3mm x 10mm self-tapping screw (8) Required Tools and Adhesives Drill Thin CA Phillips screwdriver: #1, #2 Threadlock m 2. Use a drill and 5/64-inch (2mm) drill bit to drill the four holes for the mounting screws. Use care not to accidentally drill through the top of the wing.
m 4. Use a #2 Phillips screwdriver and four 3mm x 10mm self-tapping screws to secure the gear in the wing center section. m 6. Slide one of the wheel collars on the landing gear wire. m 5. Use a file to create a flat on the bottom of the landing gear wire. This provides a place to tighten the screws for the wheel collars, making them more secure on the wire.
m 7. Slide the wheel onto the landing gear wire, then a final wheel collar. Use a 3mm x 4mm machine screw and #1 Phillips screwdriver to secure the wheel collar. Use threadlock on the screw to prevent it from vibrating loose.
2. Remove the servo and drill the four locations for the servo mounting screws with a drill and 1/16-inch (1.5mm) drill bit. 4. Remove the servo horn from the servo. Use a #1 Phillips screwdriver to install the screws provided with the retract servo to secure it in the wing center section. 3. Apply a few drops of thin CA to each hole to harden the surrounding wood. 5. Using a hobby knife, cut a cross in the covering over the opening for the wheel.
6. Remove the covering to expose the entire opening for the retract. Hint: Trim the covering about 1/16-inch (1.5mm) from the inside edge of the opening and use a covering iron to seal the covering into the opening for a super clean retract installation. 32 m 7. Position the main gear on the rails of the wing center section. Use a pencil to transfer the locations for the four mounting screws through the gear and onto the rails. m 8.
m 9. Apply a few drops of thin CA to each of the holes to harden the surrounding wood. m 11. Slide a clevis retainer onto a nylon clevis. Thread the clevis onto one of the retract pushrod wires. m 12. Attach the clevis to the actuator arm of the retract. m 10. Use a #1 Phillips screwdriver and the four selftapping screws included with the retracts to secure the gear in the wing center section. E-flite AT-6 Texan ARF Assembly Manual 13. Repeat Steps 7 through 12 for the remaining retract.
34 14. Check that both linkages are an equal distance from the output of the retract servo. Adjust the linkages as necessary. 15. Install a servo arm that aligns with the position of the linkages when installed. Secure the horn using the screw from the servo. The position of the linkages will be finetuned in the following step. Secure the wires using two 1/16-inch wheel collars to the top of the servo pushrods to work as keepers. Servo travel is important when installing retracts. m 16.
m 17. Use a file to create a flat on the bottom of the landing gear wire. This provides a place to tighten the screws for the wheel collars, making them more secure on the wire. E-flite AT-6 Texan ARF Assembly Manual m 18. Slide one of the wheel collars on the landing gear wire. Slide the wheel onto the landing gear wire, then another wheel collar.
m 19. Slide the collar on the backside of the wheel up against the wheel and tighten the 3mm x 4mm machine screw in the wheel collar with a #1 Phillips screwdriver. Use threadlock prevent the screw from vibrating loose. m 20. Check that the wheel is centered in the wheel well. Either bend the strut or change the position of the strut in the retract mechanism until the wheel is centered in the wheel well. 36 21. Repeat Steps 17 through 20 to install the remaining wheel.
Power System Installation Required Parts Fuselage Hook and loop tape 2. Remove the battery hatch by pushing it forward and lifting it upwards at the rear next to the canopy. Hook and loop strap 1. Make the connections between the motor and speed control. Secure the speed control inside the fuselage using hook and loop tape. Note: The photo shows the older E-flite 40-amp speed control unit. All of our prototypes used the new E-flite 60 and 40-amp Switching BEC ESC's.
3. Use a hook and loop strap to secure the battery inside the fuselage. Use hook and loop tape between the battery and fuselage to prevent the battery from moving forward or rearward in flight. The battery will need to be installed as far forward as you can install it to help get the CG correct. Important Information About Your Propeller It is also very important to check to be sure the propeller is balanced before installing onto the shaft.
Wing Installation Required Parts Wing panel (left and right) Wing center section Wing tube (2) 1/4-20 x 2-inch nylon bolt (2) Y-harness (2) 3-inch (76mm) servo extension (3) 4-40 x 3/4-inch socket head screw (2) Required Tools and Adhesives Ball driver: 3/32-inch Flat blade screwdriver 2. Slide one of the wing tubes into the wing center section that corresponds to the wing panel from Step 1. Threadlock 1. Secure a Y-harness to both the flap and aileron extensions in one wing panel.
4. Carefully use the string to pull the Y-harnesses through the center section and out the opening in the center of the center section. 5. Slide the wing panel onto the wing tube. Guide the servo leads into the center section while sliding the wing panel in position. 40 6. While sliding the panel on, make sure to align the tab in the center section into the outer panel. Also use care when sliding the pin on the center flap with the appropriate hole in the outer flap as not to damage the pin.
8. Untie the string from the plug ends of the Y-harness and tie it around the ends that will lead to the remaining wing panel. E-flite AT-6 Texan ARF Assembly Manual 9. Carefully pull the ends from the Y-harness to the outer edge of the center section. 10. Secure the leads from the remaining wing panel to the Y-harness. Repeat Steps 2, 5, 6 and 7 to secure the wing panel.
11. Add (3) three inch extensions to the aileron, flap, and retract ports of the receiver. Plug the Y-harnesses and retract servo leads into the three inch long extensions. Basic Cockpit and Accessories Required Parts Assembled airframe Pilot figure Landing gear fairing (2) Required Tools and Adhesives Medium CA Felt-tipped pen Side cutters 42 Canopy Radiator scoop (grey) RC-56 canopy glue Tie wrap (4) Low-tack tape 1. Use medium CA to glue the pilot figure in the fuselage as shown. 12.
2. Use RC-56 canopy glue to attach the canopy to the fuselage. Use low-tack tape to hold the canopy in position until the glue fully cures. Note that the front of the canopy has a black strip that aligns with the antiglare panel on the front of the fuselage. 3. Position the radiator scoop on the bottom of the wing center section. A felt-tipped pen can be used to color in the scoop to give that open look.
5. Use the following to paint the dummy radial engine. Optional Scale Cockpit Installation Required Parts (Included with kit) Assembled airframe Canopy Pilot figure (Available separately) Cockpit Kit (EFL4512) Pilot Figure (EFLA150) Required Tools and Adhesives Medium CA Hobby knife Sandpaper RC-56 canopy glue Low-tack tape Testors Model Master Paints Note: The cockpit kit comes prepainted from our vendor.
Floor: Gun Ship Gray 1. Remove covering over the cockpit area and sand the base until smooth. Instrument hood: Flat Black Roll over support structure: Flat Black for the main support rods and leather for the top cushion. Seat backs: Olive Drab for the seat bars and leather for the inside seat area. Note: You may want to tape off the fuselage around the cockpit opening for the next few steps to help protect the fuselage during the floor installation. E-flite AT-6 Texan ARF Assembly Manual 2.
46 3. Glue the aft structure in place using Medium CA. You will want to make sure the canopy will fit on over the aft structure once in place and not cause any height issues. 4. Glue the two seat backs in place using Medium CA. The seat backs should rest on the floor. 5. Glue the aft instrument hood in place using Medium CA. You will want to place the aft instrument decal from your kit on the panel at this time. Place the front instrument panel decal in place at this time.
6. Glue the two pilots in place using Medium CA. They should be placed all the way back, almost against the seat backs. 7. Use RC-56 canopy glue to attach the canopy to the fuselage. Use low-tack tape to hold the canopy in position until the glue fully cures. Note that the front of the canopy has a black strip that aligns with the antiglare panel on the front of the fuselage.
Control Throws 1 . Turn on the transmitter and receiver of your AT-6. Check the movement of the rudder using the transmitter. When the stick is moved right, the rudder should also move right. Reverse the direction of the servo at the transmitter if necessary. Once all the control throws have been set, make sure to slide the clevis retainers over the clevises to prevent them from opening accidentally. 2 . Check the movement of the elevator with the radio system.
Center of Gravity An important part of preparing the aircraft for flight is properly balancing the model. Caution: Do not inadvertently skip this step! The recommended Center of Gravity (CG) location for the AT-6 Texan ARF is 4 1/8– 4 1/4-inch (105–108mm) back from the leading edge of the wing wheel fairing. Please balance your model upside down with the battery installed. Gear placement of up or down does not matter.
Flying Your AT-6 Texan ARF Ensure you have set the model up correctly and have the CG where it is stated in the instructions. Taxi into the wind and set the throttle trim to where the motor idles with the prop spinning. You will need about 200 feet to take off so ensure you have plenty of room. We like to fly at the local club field instead of at a park with the AT-6. It is a substantially larger model than a park flyer and has much more mass. Do not use flaps for your first takeoff.
2007 Official AMA National Model Aircraft Safety Code GENERAL 1) I will not fly my model aircraft in sanctioned events, air shows or model flying demonstrations until it has been proven to be airworthy by having been previously, successfully flight tested. 2) I will not fly my model higher than approximately 400 feet within 3 miles of an airport without notifying the airport operator. I will give right-of-way and avoid flying in the proximity of full-scale aircraft.
11067 © 2007 Horizon Hobby, Inc. 4105 Fieldstone Road Champaign, Illinois 61822 (877) 504-0233 horizonhobby.com E-fliteRC.
