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  5. Owner's Instruction Manual

O.S. Engine GT55 Owner's Instruction Manual

Summary of GT55

  • Page 1

    Gt55 入力電圧 消費電流 出力電圧 inpu t volt age con sum ption cur rent outp ut vo ltage dc 4.8v -7.6 v 600 ma/6 000 rpm /4.8 v 20k v/60 00rp m/4 .8v it is of vital importance, before attempting to operate your engine, to read the general 'safety instructions and warnings' section on pages 2-5 of this booklet an...

  • Page 2: Warnings

    2 remember that your engine is not a " toy ", but a highly efficient internal-combustion machine whose power is capable of harming you, or others, if it is misused or abused. As owner, you, alone, are responsible for the safe operation of your engine, so act with discretion and care at all times. If...

  • Page 3: Notes

    4 when checking a spark plug with the power source on, do not hold the plug, plug cap, high tension cord nor grounding wire, or you will get a shock. Install a top-quality propeller of the diameter and pitch specified for the engine and aircraft. Do not use a nylon propeller. It has the possibility ...

  • Page 4: About The Engine

    6 about the engine this engine is designed for experienced fliers. Beginners and newcomers should not use this engine. The engine unit, carburetor and igniter are specially designed. It offers broad power characteristics suitable for sport flight as well as acro flight. The large and dense cooling f...

  • Page 5: Silencer / Installation

    8 be sure to use an effective silencer (muffler). Frequent exposure to an open exhaust may eventually impair your hearing. Such noise is also likely to cause annoyance to others over a wide area. Mount the engine in your model securely, following the manufacturers’ recommendations. Use a strong enou...

  • Page 6: Carburetor Linkage

    10 fuel inlet carburetor wla-2 parts name carburetor body high speed needle idle speed stop screw (no need to adjust. Factory adjusted.) slow speed needle air vent fitting (no need to connect in normal use.) throttle valve lever choke valve lever high speed stop lever high speed stop lever retaining...

  • Page 7: Ignition Module

    12 before connecting the throttle linkage, make sure that the throttle valve lever does not interfere with the bulkhead or mount of the model when it is fully closed and opened. Connect the throttle linkage so that clearance gap between the idle stop and idle speed stop lever distance is 1~1.5mm (re...

  • Page 8: Propeller

    14 precautions do not disassemble the ignition module and plug cap. (the ignition module is irreparable. Replace it when necessary.) be careful not to mount the ignition module so that it can be hit by water, gasoline or exhaust. Avoid using the engine when the external temperature is over 40 c. Do ...

  • Page 9: Mixing of Oil

    16 instllation of propeller install the propeller on the shaft so that the curved face of the blades faces forward – i.E. In the direction of flight. Firmly tighten the propeller washer and propeller retaining screws using the correct size wrench. Always check the tightness of propeller retaining sc...

  • Page 10: Running-In / Starting

    18 use a fuel with increased oil content and set the needle a little on the rich side. Too rich a needle setting may cause misfiring or erratic running due to fouling of the plug. Use a 25:1 fuel/oil mixture if the particular brand of oil states 30:1. If the oil states 50:1, use a 30:1 mix. Set the ...

  • Page 11

    20 4. 5. 6. 7. 8. 9. 1. 2. 3. 4. 5. Second and later starting of the day set the throttle stick on the transmitter at bottom or 1/8 (2~3 clicks) advanced from the bottom. Make sure the choke valve is fully opened. Turn on the ignition switch. Tell the helper and onlookers that you will start the eng...

  • Page 12

    22 1. 2. 4. 5. 6. 7. 8. 3. Starting with a chicken stick or gloved hand no.2 (it is suggested to use an electric starter.) fist starting of the day make sure the ignition switch is off. Close the choke valve fully. Set the throttle stick at bottom or 1/8 (2~3 clicks) advanced from the bottom. Flip t...

  • Page 13: Needle Adjustments

    24 1/4 1/2 3/4 6. 7. 8. 1. 2. 4. 5. 3. Start the engine. Open the throttle valve slowly until fully open and run the engine for 10 seconds to warm the engine. Set the throttle stick 3 clicks advanced from the bottom and measure rpm with a tachometer and write it down. Close the slow speed needle app...

  • Page 14: Flight & Maintenance

    26 when the engine is started, make sure the radio control system works normally (distance test). Engine does not run erratic with full throttle. Idling is stable. Responds positively to the throttle operation. Warm-up is finished. Flight & maintenance checking prior to flight warm-up is required as...

  • Page 15: Engine Exploded

    28 engine exploded view type of screw c...Cap screw 入力電圧 消費電流 出力電圧 inp ut vo ltag e co ns um pti on cu rre nt ou tpu t v olta ge dc 4. 8v -7.6 v 60 0m a/6 00 0rpm/4.8 v 20 kv /60 00 rpm/4.8 v 5 c .M4x20 c .M5x50 1 1-1 2 3 4 6 7 8 9 10 11 12-1 12 c .M5x45 13 14 16 15-1 15-2 15 17 18- 1 18 19 20 21 22...

  • Page 16: Carburetor Exploded View

    30 type of screw n...Round head screw carburetor exploded view 10 1 n4-40x5 2 3 4 5 6 7 8 9 9-1 11 12 13 4-4x40 12 4-40x4 12 4-4x40 14 15 16 17 18 19 20 19-1 n4-40x5 21 22 23 24 25 24-1 24-2 24-3 24-4 24-5 24-6 26 27 28 31 the specifications are subject to alteration for improvement without notice. ...

  • Page 17

    32 o.S. Genuine parts & accessories (74003010) 74003510 79871530 79870050 74003520 79871535 79870050 74003530 79871545 79870050 74003540 79871515 79871520 55500004 21109005 74003550 79871515 79871520 55500004 21109005 74003560 79871515 79871520 55500004 21109005 74003570 79871515 79871520 55500004 2...

  • Page 18: Three View Drawing

    34 40.5 40 47.4 47.4 74.6 20 20 2-m5 37.5 112.5 150 139.2 75 40 35 41.2 33 33 66 39 39 78 30 dimensions (mm) three view drawing specifications displacement bore stroke practicalr.P.M. Output weight (engine) (ignition module) 54.93 cc / 3.352 cu.In. 41.2 mm / 1.62 in. 41.2 mm / 1.62 in. 1,500-8,000 r...