5. P-51 Mustang ARF Assembly manual Specifications Wingspan: . .............. 58.25 in (1480mm) Length: . ................... 50.5 in (1284mm) Wing Area: ............... 603 sq in (38.92 sq dm) Weight: .................... 6.5–7 lb (2.9–3.2 kg) Radio: ...................... 4-channel w/5 servos Engine: . ...................
Table of Contents Contents of Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Radio and Engine Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Covering Colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Field Equipment Required . . . . . . . . . . .
Contents of Kit 1 6 5 11 7 10 9 2 3 8 4 Replacement Parts 1. Fuselage 2. Wing w/Aluminum Tube 3. Belly scoop 4. Tail set 5. Canopy 6. Cowl 7. Landing Gear Set w/Wheels and Speed Brakes 8. Aluminum Wing Tube 9. Droops 10. Exhausts 11.
Covering Colors • Black HANU874 • Silver HANU881 • White HANU870 • Dark Yellow HANU889 Field Equipment Required • Fuel (10%–15% nitro content) • Glow Plug Igniter with Charger (HAN7101) • Manual Fuel Pump (HAN118) • Glow Plug Wrench (HAN2510) • Glow Plug (HAN3001/3006) or • Start-Up Field Pack (HANSTART) Optional Field Equipment • 4-Way Wrench (DUB701) • Cleaner & towels • Blue Block After Run Oil (EVOX1000) • 12V 7Ah Sealed Battery (HAN102) • Fieldmate (HAN117) • Extra Glow Plugs (HAN3001
Limited Warranty & Limits of Liability Pursuant to this Limited Warranty, Horizon Hobby, Inc. will, at its option, (i) repair or (ii) replace, any product determined by Horizon Hobby, Inc. to be defective. In the event of a defect, these are your exclusive remedies. This warranty does not cover cosmetic damage or damage due to acts of God, accident, misuse, abuse, negligence, commercial use, or modification of or to any part of the product.
Inspection or Repairs If your product needs to be inspected or repaired, please call for a Return Merchandise Authorization (RMA). Pack the product securely using a shipping carton. Please note that original boxes may be included, but are not designed to withstand the rigors of shipping without additional protection. Ship via a carrier that provides tracking and insurance for lost or damaged parcels, as Horizon Hobby, Inc. is not responsible for merchandise until it arrives and is accepted at our facility.
Warranty Information Horizon Hobby, Inc. guarantees this kit to be free from defects in both material and workmanship at the date of purchase. This warranty does not cover any parts damage by use or modification. In no case shall Horizon Hobby’s liability exceed the original cost of the purchased kit. Further, Horizon Hobby reserves the right to change or modify this warranty without notice.
Section 1: Hinging the Ailerons and Flaps Required Items: • Wing (right and left) • Flap (right and left • CA hinge (12) Step 2 • Aileron (right and left) Required Tools and Adhesives • T-pins • Drill • Drill bit: 1/16" (1.5mm) • Thin CA • 6-minute epoxy • Sandpaper • Paper towel • Rubbing alcohol • Mixing stick • Toothpick Drill a 1/16" (1.5mm) hole into the center of the three aileron hinge slots. This creates a tunnel so the thin CA used to glue the hinges can fully penetrate the hinge.
Section 1: Hinging the Ailerons and Flaps Step 4 Step 6 Slide the aileron into position on the wing by guiding the hinges into the hinge slots in the wing. Push the aileron so there is little to no gap between the aileron hinge line. Remove the T-pins from the hinges. Deflect the aileron slightly without changing the hinge gap between the aileron and wing. Apply thin CA to each of the hinges and allow it to soak into the hinge.
Section 1: Hinging the Ailerons and Flaps Step 8 Step 9 Flex the aileron up and down a number of times to break in the hinges. Use a piece of sandpaper to roughen the flap linkage where it will extend into the flap. Use rubbing alcohol and a paper towel to clean any residual dirt from the linkage. This is done to give the epoxy a surface to hold onto when the flap linkage is epoxied into the flap. Step 10 Prepare three more hinges using the technique in Step 1. Drill 1/16" (1.
Section 1: Hinging the Ailerons and Flaps Step 11 Step 13 Cut a piece of plastic from one of the bags the wing was packaged in. Tape the plastic so it is between the wing and flap linkage, but does not cover the hinge slot. This will keep you from gluing the flap linkage to the wing in the following steps. Once the fit has been checked, remove the flap from the wing. Mix about a tablespoon of 6-minute epoxy and apply it to the flap linkage.
Section 2: Aileron Servo Installation Required Items: • Wing (right and left) • Aileron servo cover (right and left) • 3/4" x 5/16" x 9/16" (19mm x 8mm x 14mm) servo mounting block (4) • 2mm x 8mm sheet metal screw Required Tools and Adhesives • Phillips screwdriver • Clamp • Drill • 6-minute epoxy • Drill bit: 1/16" (1.5mm) • Felt-tipped pen • String or unwaxed dental floss • 12" (305mm) servo extension (2) Step 1 Step 2 Photo Step 3 Attach a 12" (305mm) servo extension to the aileron servo.
Section 2: Aileron Servo Installation Step 5 Step 7 Mix up about a tablespoon of 6-minute epoxy to glue the two 3/4" x 5/16" x 9/16" (19mm x 8mm x 14mm) servo mounting blocks to the servo cover. Align the blocks on the marks made in the previous step. A clamp can be used to hold the blocks in position until the epoxy fully cures. Remove the servo and drill the locations marked in the previous step using a 1/16" (1.5mm) drill bit. Step 8 Step 6 Plug the aileron servo into the receiver.
Section 2: Aileron Servo Installation Step 10 Step 11 Photo Tie a wheel collar onto a piece of string. Lower the string into the opening for the aileron servo. Tip the wing so the tip is facing up and lower the string through the wing. Guide the string to exit the hole in the top of the wing near the root. Step 12 Place the aileron servo into position on the wing. Use four 2mm x 8mm sheet metal screws to attach the aileron servo cover to the wing.
Section 3: Installing the Aileron Linkage Required Items: • Wing (right and left) • Aileron linkage wire (right and left) • Clevis w/retainer (2) • Control horn w/backplate (2) • 2mm x 11mm screw (2) • 2mm x 16mm screw (4) Required Tools and Adhesives • Phillips screwdriver • Drill • Drill bit: 5/64" (2mm) • Felt-tipped pen • T-pin Step 3 With the aileron servo plugged in and the radio system on, make sure the aileron servo is centered and the trim on the radio is centered.
Section 3: Installing the Aileron Linkage Step 5 Step 7 Attach the clevis to the outer hole on the control horn. Place the horn flat on the aileron, aligning the linkage parallel to the edge of the servo cover. Use a felt-tipped pen to mark the location for the three control horn mounting screws. Use a T-pin to poke holes through the covering in the area inside the triangle made by the three holes. Poke holes in the covering on both the top and bottom of the aileron.
Section 3: Installing the Aileron Linkage Step 9 Step 10 Attach the control horn to the wing using two 2mm x 16mm screws near the hinge line of the control horn and one 2mm x 11mm screw at the trailing edge of the aileron wing. The screws go into the control horn backplate which is located on the top of the aileron. Locate the flap control horn. Thread the horn onto the flap linkage so the top of the horn is 7/8" (22mm) from the top surface of the wing.
Section 4: Assembling the Wing Required Items: • Left wing panel • Right wing panel • Aluminum wing tube • Nylon strap • #2 x 5/16" wood screw (2) Step 3 Slide the panels tightly together, guiding the servo wires out of the way. Use a nylon strap and two #2 x 5/16" sheet metal screws to secure the two wing panels together. Required Tools and Adhesives • Phillips screwdriver • Sealing iron Step 1 Locate the aluminum wing tube. Slide the tube into one of the wing panels.
Section 5: Installing the Landing Gear Required Items: • Assembled wing • Landing gear strap (4) 1 • 3 /2" (76mm) wheel (2) • Landing gear (left and right) • #4 x 1/2" sheet metal screw (8) • 3/16" wheel collar w/setscrew (4) • Landing gear strap (4) Step 2 Slide a second wheel collar onto the landing gear wire. Align the collar with the end of the landing gear wire. Tighten the setscrew. Slide the wheel collar installed in Step 1 against the wheel and tighten the setscrew.
Section 5: Installing the Landing Gear Step 4 Step 6 Measure in 3/4" (19mm) from each end of the landing gear slot. Position the landing gear strap so it straddles the slot evenly. Mark the locations for the screw holes using a felt-tipped pen. Locate the left landing gear strut. Slide the strut into position on the bottom of the wing. The wheel will be towards the leading edge (front) of the wing when installed correctly. Press the landing gear into the groove of the landing gear mount.
Section 6: Installing the Engine Required Items • Fuselage • Engine mount • Engine mount plate (2) • 8-32 x 3/4" bolt (4) • 8-32 x 7/8" bolt (4) • 8-32 lock nut (4) 5 • 15 /8" (397mm) throttle pushrod wire • Clevis w/retainer Required Tools and Adhesives • Phillips screwdriver • Ruler • Threadlock (included in kit) Step 2 Locate the engine mount plates, two 8-32 locknuts and two 8-32 x 7/8" bolts. Slide the bolt through the smooth side of the engine mount plate.
Section 6: Installing the Engine Step 3 Step 5 Position the engine onto the mount, sliding it between the mount and the mounting plates. Slide the two remaining 8-32 x 7/8" bolts through the front holes in the mount. Thread the two remaining 8-32 locknuts onto the screws. Locate the 15 5/8" (397mm) throttle pushrod wire. Slide a clevis retainer onto the clevis. Thread the clevis onto the pushrod wire until the wire can barely be seen coming through between the forks of the clevis.
Section 7: Cowling and Fuel Tank Installation Required Items • Fuselage • Cowling • Spinner backplate • Fuel tank • 2mm x 10mm sheet metal screw (4) Required Tools and Adhesives • Phillips screwdriver • Card stock • Ruler • Hobby scissors • Drill bit: 1/16" (1.5mm), 1/8" (3mm) • Drill • Masking tape • Felt-tipped pen • Rotary tool w/sanding drum Step 1 Cut pieces of card stock to indicate the location of engine items such as the needle valve, carburetor and throttle arm of the engine.
Section 7: Cowling and Fuel Tank Installation Step 4 Step 7 Tape pieces of card stock to the fuselage to indicate the location of the firewall. Slide the cowling back onto the fuselage. Use tape to hold it in position as described in Step 5. Use a 1/16" (1.5mm) drill bit to drill into the fuselage in the locations for the cowling screws. Step 5 Slide the cowling onto the fuselage. Install the propeller drive washer and the spinner backplate.
Section 7: Cowling and Fuel Tank Installation Step 9 Step 12 Attach the muffler to your engine using the hardware provided with the engine. Make sure to trim the cowling as necessary to provide at least a 1/8" (3mm) gap between the muffler and engine. Connect the fuel lines to the engine. The vent line connects to the muffler. The remaining line goes to the clunk, which connects to the carburetor. Step 10 Hold the fuel tank up to a strong light to determine which line is the vent line.
Section 8: Installing the Propeller Required Items • Fuselage • Propeller • Spinner • #4 x 5/8" sheet metal socket head screw (3) • Exhaust stack, right and left • #2 x 5/16" wood screw (4) Step 3 Slide the washer and thread the nut onto the engine shaft. Rotate the propeller clockwise so it is resting against the lugs of the spinner backplate. Use an adjustable wrench to tighten the propeller nut. Do not use pliers, as the nut will not be tight enough, and could come loose.
Section 9: Installing the Flap Linkage Required Items • Wing • Clevis w/retainer (2) Step 3 • Flap linkage Required Tools and Adhesives • Adjustable wrench Once the flaps have been centered, disconnect the clevis from the linkage stay and flap control horns and move the linkage to the rear position. Step 1 Prepare the flap linkage by sliding a clevis retainer onto a clevis. Prepare two clevises and then thread them onto the flap linkage.
Section 10: Radio and Linkage Installation Required Items: • Fuselage • Radio plate • Radio foam (flat) (2) • Radio foam (precut) • #4 washer • Clevis w/retainer (2) • Nylon pushrod keeper (2) • Brass wire connector w/backplate and setscrew • 4-40 x 1/2" socket head screw • 23 3/8" (594mm) elevator pushrod • 26" (660mm) rudder pushrod Step 2 Install the servos into the fuselage using the screws provided with the servos.
Section 10: Radio and Linkage Installation Step 4 Step 6 Plug the servos, switch harness and aileron Y-harness into the receiver. Plug the receiver battery into the switch harness. Install the switch harness into the side of the fuselage using the hardware provided with the switch harness. The switch is placed on the side of the fuselage opposite the engine exhaust. Step 5 Route the antenna wire through the pre-installed tube inside the fuselage to the rear of the fuselage.
Section 10: Radio and Linkage Installation Step 8 Step 10 Place the remaining piece of flat foam over the receiver and receiver battery. Slide the radio tray into the notches on the sides of the fuel tank. Secure the radio tray using the 4-40 x 1/2" socket head screw and #4 washer. Enlarge the outer hole in the rudder and elevator servo arms using a 5/64" (2mm) drill bit. Hint: The radio tray will only fit if the fuel tank is seated with the stopper in the opening in the firewall.
Section 10: Radio and Linkage Installation Step 12 Step 14 Remove the servo horn from the throttle servo. Drill the outer hole on one of the longer arms using a 5/64" (2mm) drill bit. Slide the brass connector into the hole from the top of the servo horn. Secure the brass connector by sliding the connector backplate onto the connector from the bottom of the servo horn. Place a clevis retainer onto a clevis. Thread the clevis onto the elevator pushrod wire a few turns so it won't fall off.
Section 11: Preparing the Rudder Assembly Required Items: • Rudder • Fin • CA hinge (3) • Tail wheel assembly • Control horn w/backplate • 2mm x 12mm screw (3) • 1" (25mm) tail wheel • 1/16" wheel collar w/setscrew Required Tools and Adhesives: • Hex wrench (included with kit) • Thin CA • 6-minute epoxy • Petroleum jelly • Mixing stick • T-pins • Drill • Drill bit: 1/16" (1.
Section 11: Preparing the Rudder Assembly Step 4 Step 6 Drill a 1/16" (1.5mm) hole n the center of each hinge slot for both the rudder and fin. Test fit the rudder and fin together. The wire from the tail gear assembly fits into a hole that has been pre-drilled into the rudder. The rudder and fin should fit tightly together. If not, determine what is preventing them from sliding together and make the necessary adjustments so the hinge gap tight.
Section 11: Preparing the Rudder Assembly Step 8 Step 10 Mix up about a tablespoon of 6-minute epoxy. Apply the epoxy to the tail gear wire and the hole in the rudder. Do not apply epoxy to the slot in the rudder as this will glue the rudder to the nylon bearing, preventing the rudder from moving. Slide the rudder and fin together. Once the CA and epoxy fully cure, test the hinges by pulling on the fin and rudder. Flex the rudder a number of times in both directions to break in the hinges.
Section 11: Preparing the Rudder Assembly Step 13 Step 14 Use a T-pin to poke holes through the covering in the area inside the triangle made by the three holes. Poke holes in the covering on both sides of the rudder. Apply a small amount of thin CA in the area made by the holes in the following step. A few drops of thin CA into each hole is also required. This hardens the balsa, giving the control horn a much more solid surface to mount to.
Section 12: Preparing the Stabilizer Assembly Required Items: • Stabilizer • Elevator (2) • CA hinge (6) • Elevator joiner wire • Control horn w/backplate • 2mm x 12mm screw (3) Required Tools and Adhesives: • Thin CA • 6-minute epoxy • Mixing stick • T-pins • Drill • Drill bit: 1/16" (1.5mm) • Paper towel • Rubbing alcohol • Sandpaper • Felt-tipped pen Step 3 Mix up a small amount of 6-minute epoxy.
Section 12: Preparing the Stabilizer Assembly Step 5 Step 8 Use a straight edge along the hinge line to make sure the hinge line between the two elevators are aligned. Bend the wire or enlarge the hole in the elevator to achieve alignment. Drill a 1/16" (1.5mm) hole in the center of each hinge slot for the elevators and stabilizer. Step 6 Slide the final elevator from the joiner wire once it has been aligned. Mix up some 6-minute epoxy and apply it to the joiner wire and hole in the elevator.
Section 12: Preparing the Stabilizer Assembly Step 11 Step 13 Remove the backplate from a control horn. Position the horn 1/2" (13mm) from the inside edge of the elevator. Align the holes with the hinge line of the stabilizer and elevator. Mark the location for the three control horn mounting screws using a felt-tipped pen. Use a T-pin to poke holes through the covering in the area inside the triangle made by the three holes. Poke holes in the covering on both sides of the rudder.
Section 12: Installing the Tail Surfaces Required Items: • Fuselage • Rudder/Fin Step 2 • Stabilizer/elevator Required Tools and Adhesives: • Pliers or adjustable wrench Thread the nuts onto the rod, tightening them snugly against the bottom of the fuselage using pliers or an adjustable wrench. Do not over-tighten the nuts. Step 1 Locate the stabilizer/elevator assembly. Locate the fin/rudder assembly and remove the nuts and washers from the threaded rods on the fin.
Section 13: Attaching the Wing Required Items: • Fuselage assembly • Wing assembly • Radiator scoop • 1/4-20 x 2" nylon bolt (2) Required Tools and Adhesives: • Flat blade screwdriver Step Note: Check to make sure the servo leads are inside the fuselage and not caught between the wing and fuselage. Step Locate the two 1/4-20 x 2" nylon wing bolts. Slide the bolts into the holes in the radiator scoop so the threads are exposed.
Section 14: Final Assembly Required Items: • Fuselage • Wing • Exhaust stack (right and left) • Decal set • Canopy • #2 x 5/16" sheet metal screws (4) Required Tools and Adhesives: • Phillips screwdriver • Felt-tipped pen • Sandpaper • Masking tape • Rubbing alcohol • Paper towel • Canopy glue Step 3 Use sandpaper to lightly sand inside the line drawn on the fuselage. Also sand the inside of the canopy where it will contact the fuselage.
Section 15: Centering the Control Surfaces Ailerons Check to make sure the clevis is located in the outer hole of the control horn. If not, slide the clevis retainer forward, disconnect the clevis, connect it in the correct location, and slide the clevis retainer back into position. Connect the aileron servo leads as described in the previous section. Center the aileron trim on the transmitter. Turn on the transmitter, then the receiver.
Section 15: Centering the Control Surfaces Rudder Connect the rudder clevis to the center hole on the rudder control horn. With the radio system on, thread the clevis until the rudder is aligned with the fin. Slide the clevis retainer onto the clevis to secure its location. Center the trim lever for the rudder on the transmitter. Section 16: Checking the Control Surface Directions Ailerons Turn on the transmitter, then the receiver.
Section 16: Checking the Control Surface Directions Elevator With the radio system still on, pull back on the elevator control stick to give an up elevator input. The elevator should move up from center. If not, check the radio instructions on how to reverse the direction electronically at the transmitter. Rudder The final control surface direction to check is the rudder. With the radio system on, move the rudder stick to the right, this will make the plane turn right.
Section 17: Checking the Control Throw Amounts The following section covers checking the amount of throw each control surface has and how to increase or decrease the amount of throw to match the throws listed in the manual. In addition, you will check to make sure each control surface is moving the correct direction when operated from the transmitter. After checking that the controls are moving in the correct directions, the amount of the control movement must be checked.
Section 18: Adjusting the Throttle With the radio system on, move the trim lever and throttle lever towards the bottom of the transmitter. Look into the carburetor to check that the barrel is closed. Move the trim lever up towards the top of the transmitter. The barrel in the carburetor should have an opening of around 1/16". Move the throttle stick towards the top of the transmitter. The carburetor will now be in the fully open position.
Section 19: Balancing Your P-51 ARF In order for your P-51 Mustang ARF to fly correctly, you will need to check the balance of the plane. This is done by supporting the aircraft either using your fingers, or by using a balancing stand. Not checking the balance can result in an aircraft that is difficult to fly, which can lead to the possibility of crashing your model. Marking the Balance Point The first step in balancing your P-51 Mustang ARF is to mark the location for the balance point.
Section 19: Balancing Your P-51 ARF Adding Weights to Correct the Balance Due to manufacturing differences, it is possible that the P-51 Mustang ARF may not be balanced properly. Weights can be added to either the tail or the nose of your P-51 Mustang ARF if it does not balance properly. Stick-on weights are the easiest to use, and come in sizes that are easily placed on your plane. Add just enough weight as necessary to balance your plane.
Section 21: Maintaining Your P-51 Mustang ARF The following is a check list that you should follow every time you have completed a flying session with your P-51 Mustang. Doing so will keep your aircraft in the best flying condition. Clean Up After a long flying session with your P-51 Mustang ARF, you will want to clean it up before loading it into your vehicle to head home. Use a cleaner such as Windex or 409 and a paper towel to wipe down the exterior of your plane, removing the fuel residue.
Section 22: Progressing With Your Flying Skills The P-51 Mustang ARF is a special trainer plane in that it will allow you to go from learning the basics of flight all the way up to performing aerobatics without upgrading or purchasing a new plane. As you learn to fly and become ready for a little more challenge, the P-51 Mustang ARF will grow with you. The following items can be installed depending on your particular skill level.
Section 22: Progressing With Your Flying Skills Step 2 Move the linkage to the rear hole in the flap linkage stay. Intermediate To complete the conversion of your P-51 Mustang to a docile trainer, all you need to do is install the speed brakes. With the speed brakes installed, the flaps in the down position and the NACA wing droops all installed, you have a plane that can be used, with a trained flight instructor, for basic training. Step 1 Position the speed brakes as shown on the landing gear wires.
Section 23: Adding a Flap Servo Required Tools and Adhesives: • Plier (2) • Drill bit: 1/16" (1.5mm) Step 1 Remove the flap linkage from the aircraft. Step 2 Step 5 Place the servo (not included) into the opening. Use a 1/16" (1.5mm) drill bit to drill holes in the underlying wood for the servo mounting screws. Once the holes are drilled, use the four screws that were provided with the servo to secure it into position. Remove the flap linkage stay from the wing.
Section 23: Adding a Flap Servo Step 7 Step 8 Turn on your radio system. Move the control on the transmitter to the up position. Attach the servo arm and secure it with the screw provided with the servo. The servo arm should be offset towards the leading edge of the wing as shown in the photo. Attach the flap linkage to the flap servo arm. Check the operation of the flaps from the radio system. The flaps will now move from up to a lowered position using the radio system.
2006 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.
2006 Official AMA National Model Aircraft Safety Code 5) Flying sites separated by three miles or more are considered safe from site-to site interference, even when both sites use the same frequencies. Any circumstances under three miles separation require a frequency management arrangement, which may be either an allocation of specific frequencies for each site or testing to determine that freedom from interference exists.
5. © 2006 Horizon Hobby, Inc. 4105 Fieldstone Road Champaign, Illinois 61822 (877) 504-0233 horizonhobby.
