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OHIO MODEL Products 120CC Yak SP-55M User Manual

Manual is about: Giant Scale Aerobatic Aircraft

Summary of 120CC Yak SP-55M

  • Page 1

    120cc yak sp-55m giant scale aerobatic aircraft.

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    Specifications: wing span: 108 inches length: 100 inches (including spinner) wing area: 2105 sq. In. Flying weight: 26 to 28 lbs engine: 100cc to 120cc gas radio: 6 to 9 channels servos : 180 - 330 oz required ohio model products 199 stratford lane xenia, ohio 45385 (937) 372-0603 www.Ohiomodelplane...

  • Page 3: All Resulting Liability.

    By the act of using the final assembled model, the purchaser/operator accepts all resulting liability. Ohio model products warranty and return policy ohio model planes guarantees this product to be free from defects in both material and workmanship at the date of purchase. This does not cover any pa...

  • Page 4

    Included features: carbon fiber wing and stab tubes carbon fiber reinforced wing and fuselage spars airfoiled composite landing gear included servo clips complete hardware package carbon fiber tail wheel assembly 4 1/2" carbon fiber spinner included long aluminum servo arms included advanced ball li...

  • Page 5

    Aircraft covering: 1. With all arfs, varying temperatures and storage delays can cause covering material to loosen over time and transportation. Omp recommends lightly going over all the covering with a covering iron set at medium temperatures. Be sure to use a soft cover over your iron so you do no...

  • Page 6

    5. Mix up some 30 minute epoxy and using a toothpick or small wooden dowel coat the inside of each hinge slot with epoxy. Also put a thin layer of epoxy on one side of the flat hinges. Install this end into the slots of the rudder and make sure each hinge is properly aligned at exactly 90 degrees to...

  • Page 7

    2. Bolt the main gear to the bottom of the fuselage using the supplied bolts. Use a small drop of thread- lock to secure the bolts in place. 3. Bolt the gear cover plate in place using the single bolt provided and the hole in the center of the gear..

  • Page 8

    4. Install the main wheel axles to the composite landing gear and tighten the nylon-insert lock nut. Install one wheel collar onto the axle. Use a second wheel collar as a guide to leave a gap on the inboard of the axle. Use a small drop of thread-lock and tighten in place. Slide the wheel onto the ...

  • Page 9

    5. Fit the wheel pant in place and install using the two supplied screws. Use thread-lock to secure the screws in place. Repeat the above steps for the other main gear. 6. Begin the tail wheel assembly by installing the shaft bushing and lock nut into the large hole at the rear of the tail wheel bra...

  • Page 10

    7. Center the tail wheel bracket on the rear of the fuselage and screw in place using three of the supplied wood screws. Remove the screws and harden the holes with a drop of thin ca. Allow the ca to cure and then permanently install the tail wheel bracket. 8. Locate the ball link end for the tail w...

  • Page 11

    4. Locate the pull-pull cable set, threaded couplers, brass swaging tubes, and ball-links. If the cable is one long piece, cut it into two equal length pieces. Thread one end of the one cable through a brass tube and then through one of the threaded couplers. Run the cable back through the brass tub...

  • Page 12

    The rudder centered, adjust the cable length as tight as possible while checking the ball link position over the servo arm. When satisfied with the position, pinch the cable around the threaded coupler and then feed the loose end back through the brass tube. Loop the cable back through the brass tub...

  • Page 13

    4. Mount your ignition battery securely to the engine box. A typical location is on the side or top of the engine box. The ignition switch should be mounted to the fuselage side wall just behind the cowling. Secure all cable connections neatly and firmly. 5. Assemble the throttle servo mount using t...

  • Page 14

    6. The fuel tank is preassembled. Complete the installation in the fuselage using zip ties or velcro straps to hold the tank in position. Connect a fuel line between the tank and carb, a fuel line between the tank vent and the bottom of the fuselage, and a fill line to a fueling port which can be mo...

  • Page 15

    2. Install the propeller and spinner. Large gasoline engines are very powerful and can cause damage to persons or property if propellers and spinners are not installed properly. Follow the manufacturer’s instructions and make sure your props are well balanced, properly drilled, and display no cracks...

  • Page 16

    4. To install the horizontal stabilizers you first need to install two 42” servo wire extensions in the fuselage so that they extend from the radio compartment to the aft openings. A servo wire tunnel is provided in the fuselage to guide the wires. 5. Slide the stabilizer carbon fiber tube into the ...

  • Page 17

    3. Use your radio to set the centers of each servo and then assemble and adjust the length of each control rod. The servo arm should be as close to perpendicular to the control rod as possible while the elevator is at neutral. Double check all screws, bolts and nuts to assure proper installation and...

  • Page 18

    7. Check the final radio operation of the ailerons and make sure there is no binding or servo fighting of each other. Also check to make sure all linkage bolts and nuts are secure. Final radio system installation: 1. Whether you 72 mhz systems or the newer 2.4 ghz systems, proper radio installation ...

  • Page 19

    Balancing and pre-flight: 1. Most state of the art aerobatic aircraft allow for a wide margin for balancing depending on what level of precision or freestyle the pilot prefers. To perform properly without being too pitch sensitive, you must not go too aft on the cg. Omp recommends an initial cg sett...

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    Ohio model products 199 stratford lane xenia, ohio 45385 (937) 372-0603 www.Ohiomodelplanes.Com.