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Skysun Hobbies Pitts 150cc Assembly Manual

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Summary of Contents for Skysun Hobbies Pitts 150cc

  • Page 2 Caution! 1 You should not regard this plane as a toy! 2 To ensure safety, please read this instruction manual thoroughly before assembly. 3 Building and operating a model plane requires diligent practice and correct guidance. An inexperienced flyer can cause serious injury and property damage.
  • Page 3 Main Landing Gear and Tail Wheel Unit Tail Wheel Unit Drill a hole and make it fit the steering tube. Do not glue it into position untill the tail wheel installation step is completed. Assembly photo for the tail wheel parts. Use the tail wheel bracket as a template and drill holes for the mounting bolts.
  • Page 4 Install the blind nuts through the openning in the rear of the fuselage. Attach the tail wheel bracket and secure the bolts with Blue Loctite. Install the hatch with 4 self- tapping screws Insert the steering arm into the rudder steering tube and position the tube ready for gluing.
  • Page 5 Main Landing Gear Istallation All parts for the main landing gear Install the landing gear in the pre-drilled holes with the supplied bolts and locking nuts. Secure the bolts with Blue Loctite Install the landing gear axles with lock nuts but do not tighten yet.
  • Page 6 Install the wheel and tighten the collar set screw using a drop of Blue Loctite. Make sure the wheel rotates freely. Slipping the wheel pant over the axles and mark the position for the two attached bolts. Drill the holes for the attached bolts and install the blind nuts as shown.
  • Page 7 Rudder Installation Parts for Rudder installation The rudder cables and couplers have been pre installed as shown 1 Drill holes for the mounting screws. Fit the servos as shown with the servo label facing the rudder. Harden the area around the holes with a drop of thin CA.
  • Page 8 Use brass crimps on each cable and thread, the cable through the end of the pull- pull connector. Crimp the brass tube with a crimping tool or pliers A drop of thin CA may be applied to the brass tube to help secure the cable...
  • Page 9 Install the rudder ball links with bolts and locking nuts. Check the pull-pull cables. Rudder and the rudder servo should both be in the neutral position.
  • Page 10 Stabilizer Installation Parts for stabilizer Use the safety clips (buy separately) to secure the servo and servo extension. Install servos as shown with the servo label facing the rear of the fuselage.
  • Page 11 Install the stab with mounting bolts and washers. Assembly the servo arm in the vertical position as shown. Adjust the pushrod length so that the servo and elevator are both in the neutral position. Repeat the previous steps for the other wing. Install the stabilizer tube and bolts.
  • Page 12 Engine Installation Illustrations for a DA-150 installation are provided below. Gather the engine,mounting hardware and supplied DA 150 hardwood mounting spacer block. Find out the parts of the firewall. The required distance from the front of the firewall to the front of the prop mount on the engine is 8 1/8”...
  • Page 13 Install the aluminum angel with right distance. And use screw to fix it up. fix the aircraft plywood as firewall onto the aluminum with screw. Draw the mounting template hole for the engine.
  • Page 14 Install the canister headers to the engine cylinder heads.Attach the throttle pushrod to the engine throttle arm as shown. Layout the location of the throttle servo and throttle pushrod.Ensure the servo and pushrod donot interfere with the canister muffler headers. Install the throttle pushrod to the engine throttle arm as shown.
  • Page 15 Use a drop of blue Loctite on muffler bolts before installation. Install muffler cans using the supplied gasket or high temp silicon gasket material and securely bolt to cylinder heads as shown. Ignition Installation Gather the ignition module, ignition battery,...
  • Page 16 Position the ignition module inside the engine box to allow both of the spark plug leads to exit and properly connect to the engine without excess tension or chafing. Mark the location for the nylon tie mounting holes. Roll the supplied foam rubber to make a 4 layer pad as shown.
  • Page 17 Use a 1/4” drill bit to drill the ignition timing lead hole in the firewall Thread ignition connector through firewall and connect ignition timing connectors with Safety Clip. Ensure the connectors will not come apart from vibration or light tension. Connect the ignition cutoff, regulator, and battery Final ignition setup shown.
  • Page 18 Fuel Tank Install the inside parts of fuel tank as shown. Assembly the outside fuel pipe as shown. Tighten the velcro ties secure the fuel tank.
  • Page 19 Radio Installation Gather the (2) radio batteries, Power Expander,switches and power expander mounting hardware Attach power expander to mounting rails Mark the location of the mounting rails...
  • Page 20 Use 30 Minute epoxy to glue mounting rails in place as shown. Install power expander using four wood screws(not supplied) Install switches refer to switch manufacturers recommendations for specific mounting methods. Install un-supplied Velcro straps.
  • Page 21 Use the foam mounting pads supplied with the kit to protect batteries from vibration. Using Velcro straps secure batteries in place A typical radio installation shown Apply baby powder or corn starch to antenna wires to assist getting antennas into their guide tubes.

  • Page 22: Cowl Installation

    Push receiver antennas all the way into the receiver antenna guide tubes. Tape the receiver antenna wires to the end of the antenna guide tubes and to the radio floor as shown. This will prevent the antenna wire from vibrating back out. COWL INSTALLATION Gather the following material for making a cowlcutout...
  • Page 23 Measure and mark the center of the template Measure and mark a center line on bottom of fuse as shown Align centerline marks of template and fuse. Use masking tape to securely hold the template to the fuse. Lift the template material so that it contacts the bottom of the muffler exhaust stacks.
  • Page 24 Enlarge the holes to allow a 1/4” clearance around the outside edge of the exhaust stack tubes. Trial fit the template until the proper size and location of holes are achieved. Use a rotary cutting tool and sanding drum to cut the exhaust stack exit holes as needed.
  • Page 25 Manual Choke Pushrod Installation Gather the choke pushrod and ball link assembly. Measure the length of the choke pushrod required to extend out of the front of the cowl when the choke control arm is fully pushed aft. Cut pushrod to correct length and make a 90ºbend.
  • Page 26 Finished choke pushrod installation shown Wing Assembly Remove the covering from the servo position as shown. Use the safety clips (buy separately) to secure the servo and servo extension connected.
  • Page 27 Put the servo into the servo hole, and mark the position for the screw to fixup the servo. Pull the extension lead through to the root of the wing. Drill holes for the servo mounting screws and harden the wood around the holes with a drop of thin CA.
  • Page 28 Repeat the previous steps for the other wing. Please install the wing tube and wing bolts in the final assembly. Attn: Connect the two upper wings with carbon fiber tube. Connect the two lower wings with carbon fiber tube to the fuselage.
  • Page 29 Bracket and Wire Installation Find out the bracket 1 for this step Put the bracket 1 in the right position, and use screw to fix it up to the fuselage. Repeat the same on the other side of fuselage.
  • Page 30 Find out the hole for screw in the back of the upper wing. Screw the bracket 1 to the back of the upper wing. Use screw to contect the metal clevis with the wires onto the bracket 1. Find out the bracket 2 as shown Use the screw to fix into the wings.
  • Page 31 Insert the it to the wood part, align the holes in a line. Add a bent metal parts to the bracket 2 , and use screw to connect them. Use screw to contect the metal clevis with the wires onto the bracket 2. Do the same on the other side of the wire, and fix it to the fuselage.
  • Page 32 Finished photo like this. Do the same on the tail.
  • Page 33 14 Finished Photo...

  • Page 34: Center Of Gravity - Control Throws

    CENTER OF GRAVITY - CONTROL THROWS The recommended CG range is 1” to 1 1/2”back from the wing leading edge measured at the wing TIP of the TOP wing as shown. Balance the plane without fuel in the tank with the batteries installed and ready to fly.
  • Page 35 If additional nose weight is necessary we recommend Note: moving the engine forward slightly by adding extra spacer or washers to move the C.G. forward. Try this before adding an additional weight. 4 For aerobatic flying a more aft balance point is better.
  • Page 36 Control Throw Deflection Table...