Sundowner 36 ARF Assembly Manual
Notice Table of Contents Intro...................................................................................2 Product Support................................................................2 Specifications.....................................................................2 Included Parts Listing........................................................3 Contents of Kit and Parts Listing.......................................4 Safety Precautions and Warnings......................................
Included Parts Listing 3mm washer Packaged individually Large Bags Fuselage with canopy hatch Left wing with aileron Right wing with aileron Tail set Landing gear Wheel pants (right and left) Cowl Carbon wing tube Spinner Landing gear cover plate Fuselage Main wheel, 2-inch (51mm) Nylon clevis Pushrod connector (with 3mm x 4mm machine screw) 1.5mm knurled nut 1.5mm washer Tail gear wire with wheel collar and setscrew Tail wheel bracket Tail wheel, 1-inch (25mm) Wheel collar with setscrew, 1.
2 Safety Precautions and Warnings 1 6 8 4 Read and follow all instructions and safety precautions before use. Improper use can result in fire, serious injury and damage to property. Age Recommendation: Not for children under 14 years. This is not a toy. Components 5 7 Use only with compatible components. Should any compatibility questions exist please refer to the product instructions, the component instructions or contact Horizon Hobby, Inc. Flight Fly only in open areas to ensure safety.
Safe Operating Recommendations UltraCote® Covering Colors • I nspect your model before every flight to make certain it is airworthy. • Be aware of any other radio frequency user who may present an interference problem. White True Red Black Silver • lways be courteous and respectful of other users of A your selected flight area. Recommended Setup–2-Stroke Glow • hoose an area clear of obstacles and large enough to C safely accommodate your flying activity. Evolution® .
Required Tools Ball driver: 2.5mm Card stock Drill Epoxy brush Felt-tipped pen Flat file Hobby scissors Hobby knife with #11 blade Low-tack tape Measuring cup Medium grit sandpaper Mixing cup Mixing stick Nut driver: 5.5mm, 7mm Open end wrench: 10mm Paper towels Pencil Phillips screwdriver: #1, #2 Pin vise Razor saw Rotary tool Rubbing alcohol Ruler Sanding drum Side cutter Square String Tapered reamer T-pins Hook and loop tape Hook and loop strap Drill bit: 1/16-inch (1.5mm), 5/64-inch (2mm), 7/64-inch (2.
5. Slide the tube and wing panel into position on the fuselage. The wing will fit tight against the fuselage when installed. 6. Slide the remaining wing panel into position against the fuselage. 8. Measure from each wing tip to each stabilizer tip. Position the stabilizer so both measurements are equal as shown. A A A=A Important: The stabilizer must be aligned to the wing as shown in the following steps.
10. Once the alignment has been set, use a felt-tipped pen to mark the outline of the fuselage on the stabilizer. This will allow easy repositioning as it will be removed in the following step. 11. Remove the stabilizer from the fuselage. Note the direction of the top and bottom of the stabilizer indicated by the tape placed on it back in step 1. Slide the elevator into the slot, noting the top and bottom to match that of the stabilizer that was just removed. 12.
17. Place the hinges in the elevator. 18. Carefully position the elevator so the hinges are inserted into the stabilizer. Make sure that all the hinges get installed, and that none get folded over accidentally. The elevator will fit tightly against the stabilizer as shown. Use the T-pins as handles to help in positioning the hinges. 19. Remove the T-pins from the hinges. Make sure the elevator is pressed tightly against the stabilizer to eliminate any hinge gap.
Rudder, Fin and Tail Wheel Installation 2. Test fit the fin at the rear of the fuselage. Slide the fin Required Parts Fuselage Aluminum tail wheel bracket Tail gear wire Fin with rudder and hinges Tail wheel, 1-inch (25mm) 2mm x 8mm self-tapping screw (2) Wheel collar with setscrew, 1.5mm Required Tools and Adhesives Ruler Hex wrench: 1.
6. Use a square to check that the fin is square to the stabilizer. There will be a slight amount of play to correct for any alignment issues. 8. Use a pin vise and 1/16-inch (1.5mm) drill bit to drill a 11. Remove the tail gear wire from the rudder. Use hole that is 1/2-inch (13mm) deep 7/8-inch (22mm) from the medium grit sandpaper to roughen the tail gear wire where it bottom of the rudder. contacts the rudder. 7. Use low-tack tape to hold the fin in position until the 9.
13. Mix a small amount of 15-minute epoxy. Apply the epoxy to the notch in the rudder and the tail gear wire where it fits in the rudder. Insert the wire and use low-tack tape to hold the wire in position until the epoxy cures. Remove any excess epoxy using rubbing alcohol and a paper towel. 15. Place a T-pin in the center of the three hinges removed in step 1. This will center the hinges evenly in the rudder and fin. 18. Remove the T-pins from the hinges.
20. Once the CA has cured, gently pull on the rudder and 22. Use a piece of low-tack tape to tape the tail wheel 24. Remove the tape and swing the bracket to the side. bracket to the bottom of the fuselage. Make sure the mounting Thread a 2mm x 8mm self-tapping screw into each hole holes in the bracket are aligned with the fuselage centerline. to cut threads in the surrounding wood using a #1 Phillips screwdriver. Remove the screw before proceeding to the next step. 21.
26. Secure the tail wheel bracket to the fuselage using two 2mm x 8mm sheet metal screws and a #1 Phillips screwdriver. Note: Always use threadlock on metal-to-metal fasteners to prevent them from vibrating loose. 27. Use a 1.5mm hex wrench to loosen the setscrew in the wheel collar. Slide the wheel collar against the tail wheel bracket and tighten the setscrew to secure its location. Note: Always use threadlock on metal-to-metal fasteners to prevent them from vibrating loose. 28.
2. Prepare the rudder control horn by threading the control horn fitting on the control horn so the top of the fitting measures 3/4-inch (19mm) from the base of the horn. It may be necessary to hold the screw using a #1 Phillips screwdriver while installing the fitting. 4. Test fit the elevator servo in the opening in the lefthand side of the fuselage. Make sure the output of the servo faces to the rear of the fuselage.
8. Secure the elevator servo in the fuselage using the screws provided with the servo and a #1 Phillips screwdriver. Make sure the output of the servo faces to the rear when installed in the fuselage. Route the servo lead through the servo tray in the location shown in the photo. 9. Prepare the servo horn by enlarging the hole in the arm that is 3/8-inch (9.5mm) from the center of the servo horn using a pin vise and 5/64-inch (2mm) drill bit.
14. Use a pin vise and 5/64-inch (2mm) drill bit to drill the three holes for the control horn mounting screws. Apply 2–3 drops of thin CA in each hole to harden the surrounding wood. 16. With the elevator servo centered, thread the nylon clevis on the pushrod wire. When the clevis is attached, the control surface must be centered as shown. 17. Install rudder servo and the 217/8-inch (555mm) rudder pushrod following steps 3 through 15. Use the rudder control horn prepared in step 2.
Main Landing Gear Installation Note: Always use threadlock on metal-to-metal fasteners to prevent them from vibrating loose.
6. Slide a 4mm washer on the axle as shown. 7. Place a drop of light machine oil on the axle so the wheel can rotate easily. Slide the wheel on the axle, then secure it with a 4mm wheel collar. Install the collar so it is flush with the end of the axle. Tighten the setscrew on the flat made in the previous step using a 1.5mm hex wrench. 8. Insert the wheel assembly into one of the wheel pants. The threaded portion of the axle will fit into the notch of the wheel pant.
Hinging the Aileron Required Parts Wing panel with aileron and hinges (right and left) 3. Place a T-pin in the center of the four hinges removed in step 6. This will center the hinges evenly in the rudder and fin. 6. Remove the T-pins from the hinges. Make sure the aileron is pressed tightly against the wing panel to eliminate any hinge gap. Check that the ends of the aileron have an equal gap and are centered in the opening for the aileron in the wing panel.
8. Once the CA has cured, gently pull on the wing and aileron to make sure the hinges are glued securely. If any hinges are loose, apply more CA and check them again. 9. Flex the aileron through its range of motion a number of times to break in the hinges. This will reduce the load on the servo for those first flights.
4. Use a hobby knife and #11 blade to remove the covering to expose the slot for the servo horn and mounting screw locations in the servo cover. 5. Use a hobby knife with a #11 blade to trim the covering 1/16-inch (1.5mm) inside the opening for the aileron servo in the wing. Use a trim seal tool to iron the covering down around the edges for a finished opening. 22 6. Repeat steps 4 and 5 to prepare the remaining aileron servo cover and hinge the remaining aileron. 7.
10. Sand the 5/16 x 5/16 (8mm x 8mm) end of the 12. Test fit the servo cover in the opening in the wing. hardwood block. This will be the end glued to the plate in the It may be necessary to notch the cover support rail to clear the hardwood block. Use a rotary tool and sanding drum to following step. Prepare two blocks at this time. carefully notch the rail, being careful not to sand the wing sheeting or remove too much material from the rail. 14.
16. Apply 2–3 drops of thin CA in each hole drilled. Also saturate the front and rear of the block using thin CA to harden the block. This will help keep the block from splitting when the servo mounting screws are installed. 18. Fit the aileron servo and cover to the wing. Use a pencil to transfer the four positions for the servo cover mounting screws onto the cover rails. 20.
22. Secure a 6-inch (152mm) servo extension to the servo lead using string or a commercially available connector. 24. Secure the servo cover and servo to the wing using a #1 Phillips screwdriver and four 2mm x 8mm selftapping screws.
2. Center the control horn on the mark made in the previous step. The holes in the control horn will align with the hinge line. Use a felt-tipped pen to mark the locations for the two mounting screws on the aileron. 4. Use two 2mm x 12mm machine screws and the control horn backplate to secure the control horn to the aileron. Use a #1 Phillips screwdriver to tighten the screws. Be careful not to crush the underlying wood when installing the control horn. 6.
Engine Installation Required Parts Fuselage assembly Engine mount (right and left) 3mm blind nut (4) 3mm locknut (4) 3mm lock washer (4) 3mm washer (12) Engine Plywood engine mount template 3mm x 20mm socket head screw (4) 3mm x 25mm socket head screw (4) Required Tools and Adhesives Drill Hobby knife with #11 blade Pencil Tapered reamer Side cutter Thin CA Hex wrench: 2.5mm Nut driver: 5.5mm Ruler Medium CA Drill bit: 1/8-inch (3mm), 3/16-inch (5mm) 2.
Hint: Use a drop of medium CA to attach the blind nut to your finger so it can be installed easily. Make sure it is not glued too well as it may become difficult to break free. 8. Prepare four 3mm x 20mm socket head screws by sliding a 3mm lock washer and 3mm washer on each screw. 11. Position the engine so the face of the drive washer is 315/16-inch (100mm) forward of the firewall. Make sure to measure from the firewall where the mount is located, not the edges of the engine box. 6.
Hint: Use a drill press to drill the holes for the engine mounting bolts so they are nice and straight in the mount. Throttle Servo and Linkage Installation 14. Use four 3mm x 25mm socket head bolts, eight 3mm Required Parts washers and the four 3mm lock nuts to secure the engine to the mounting rails. Use a 2.5mm hex wrench and 5.5mm nut driver to tighten the hardware. Also remember to tighten the screws that secure the mount to the firewall using a 2.5mm hex wrench. 2.
4. Remove the servo from the servo tray. Use a pin vise and 1/16-inch (1.5mm) drill bit to drill the holes for the servo mounting screws. 5. Use a #1 Phillips screwdriver to run a servo mounting screw in each of the holes to cut threads in the surrounding wood. Remove the screw before proceeding to the next step. 7. Secure the servo in the servo tray using the screws provided with the servo and a #1 Phillips screwdriver. Route the servo lead through the notch in the servo tray support. 9.
11. Use a ruler to measure down 11/8-inch (29mm). Mark the front edge of the fuselage in the location shown. 12. Use a pin vise and 7/64-inch (2.5mm) drill bit to drill a hole as close to the engine box as possible for the throttle pushrod tube. 13. Use medium grit sandpaper to sand a 1/2-inch (13mm) wide area on the pushrod tube that is 11/2-inch (38mm) and 31/2-inch (89mm) from the ends of the tube. This provides an area for the CA to adhere to when the tube is glued in place. 15.
Note: Always use threadlock on metal-to-metal fasteners to prevent them from vibrating loose. 17. Move the carburetor to the open position. Use the radio system to move the throttle servo to the open position. Insert the wire through the pushrod connector and secure it with the 3mm x 4mm socket head machine screw. Use a 2.5mm hex wrench to tighten the screw.
4. Slide the 17/8-inch (48mm) aluminum tube through 6. Attach the 41/2-inch (115mm) piece of fuel tubing to the straight tube. Use a hobby knife to trim the length of the tube to a length of 23/4-inch (70mm) as shown in the photo below. 5. Slide the larger stopper plate over the tubing at the front. Start the 3mm x 30mm self-tapping screw using a #1 Phillips screwdriver. The screw only needs to be in far enough to keep the large stopper plate from falling off.
9. Use a #1 Phillips screwdriver to tighten the 3mm x 30mm self-tapping screw that secures the stopper in the tank. Don’t over-tighten the screw as you could damage the fuel tank. It needs to be tight enough to create a seal between the tank and stopper. 11. Slide the fuel tank into the fuselage. Guide the lines from the tank through the hole in the firewall. Slide the tank in only as far is it will easily slide. Do not force the fuel tank forward and damage the fuel lines.
2. Slide the cowling on the fuselage until the inner support of the cowling contacts the fuselage. Use a felttipped pen to transfer the locations from the card stock to the cowling. 3. Use hobby scissors and a rotary tool with a sanding drum to remove the material necessary to fit the cowl over the engine. Work slowly, removing only small amounts from the cowl at a time. Test fit the cowling periodically to make sure it is fitting properly. Create a small opening for the muffler at this time as well.
Receiver, Receiver Battery and Switch Harness Installation Glow Option 2. Connect the leads from the rudder, elevator and throttle 4. Mount the remote receiver in the fuselage away from servos to the receiver. Also connect the switch harness and the main receiver using hook and loop tape. Make sure extensions for the ailerons at this time. to orient the antenna on the remote receiver in a different direction than those on the main receiver for the best reception from your radio system.
Motor Installation Required Parts Fuselage assembly 3mm lock nut (4) 3mm washer (8) Electronic speed control Motor with hardware and X-mount Aluminum stand-off, 3/4-inch (22mm) (4) (Power 25) Aluminum stand-off, 11/16-inch (27mm) (4) (Power 32) Plywood engine mount template 3mm x 30mm socket head screw (4) (Power 25) 3mm x 35mm socket head screw (4) (Power 32) Hook and loop tape (not included) 2. Use a drill and 1/8-inch (3mm) drill bit to drill the four holes for mounting the engine.
5. Prepare four 3mm x 35mm socket head screws by sliding a 3mm washer on each screw. 6. Slide the screws through the firewall from inside the fuselage. You may need to use needle nose pliers or hemostats to hold the screws while inserting them in the fuselage. 7. Slide an aluminum stand-off on each of the screws. Note: The Power 32 will require four 11/16-inch (27mm) aluminum standoffs. Use four 3/4-inch (22mm) aluminum standoffs for the Power 25 installation. 8.
11. Secure the switch in the fuselage using a small amount of silicone adhesive or two-sided tape. Position the switch so it does not interfere with the installation of the motor battery. Cowling, Propeller and Spinner Installation - EP Option Required Parts Fuselage assembly Cowling 3mm washer Fuel tubing (not included) Propeller (not included) Spinner assembly (not included) 3mm x 10mm socket head screw (2) 2.
4. Slide the fuselage into position on the front of the fuselage. Use two 3mm x 10mm socket head screws and two 3mm washers to secure the cowl to the fuselage. Important: Always balance the propeller before securing it to the motor. An unbalanced propeller can transmit vibrations into the motor or airframe, causing damage or even failure of these components. 6. Use a 3/32-inch hex wrench to tighten the screw securing the spinner cone to the backplate assembly.
2. Use hook and loop tape to secure the receiver in the fuselage. Make sure to route the leads so they don’t interfere with the operation of the servos. 4. Secure the battery in the fuselage using hook and loop straps. Use a piece of hook and loop tape along the bottom of the battery to keep it from sliding on the battery tray.
2. Locate the carbon wing tube. Slide the tube into one of the wing panels. It will slide in easily, so do not force it further than it will easily slide. 4. Slide the remaining wing panel into position against the fuselage. 3. Slide the tube and wing panel into position on 5. Connect the leads from the aileron servos to the lead (or Y-harness) from the aileron ports of the receiver. the fuselage. The wing will fit tight against the fuselage when installed. 7.
Center of Gravity An important part of preparing the aircraft for flight is properly balancing the model. CAUTION: Do not inadvertently skip this step! 1. The recommended Center of Gravity (CG) location for 3. You should find the CG to be very close with the components installed as shown in this manual. If the nose of your aircraft hangs low, add weight to the rear of the aircraft. If the tail hangs low, add weight to the nose of the aircraft.
Preflight Rudder: High/Low Rate: Right: 5/8-inches Left: 5/8-inches 16mm 16mm 15% Expo 15% Expo Note: Measure the rudder throw from the bottom edge of the rudder at its widest point. These are general guidelines measured from our own flight tests. You can experiment with higher rates to match your preferred style of flying. Note: Travel Adjust, Sub-Trim and Dual Rates are not listed and should be adjusted according to each individual model and preference.
Safety Do’s and Don’ts for Pilots • Consult local laws and ordinances before choosing a location to fly your aircraft. • Check all control surfaces prior to each takeoff. • Do not fly your model near spectators, parking areas or any other area that could result in injury to people or damage of property. • o not fly during adverse weather conditions. Poor D visibility can cause disorientation and loss of control of your aircraft. Strong winds can cause similar problems. • Do not take chances.
Warranty Services Questions, Assistance, and Repairs Your local hobby store and/or place of purchase cannot provide warranty support or repair. Once assembly, setup or use of the Product has been started, you must contact Horizon directly. This will enable Horizon to better answer your questions and service you in the event that you may need any assistance. For questions or assistance, please direct your email to productsupport@horizonhobby.com, or call 877.504.
Academy of Model Aeronautics National Model Aircraft Safety Code Effective January 1, 2011 A. GENERAL A model aircraft is a non-human-carrying aircraft capable of sustained flight in the atmosphere. It may not exceed limitations of this code and is intended exclusively for sport, recreation and/or competition. All model flights must be conducted in accordance with this safety code and any additional rules specific to the flying site. 1. Model aircraft will not be flown: (a) In a careless or reckless manner.
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