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  2. Radio-controlled helicopter - Wikipedia

    en.wikipedia.org/wiki/Radio-controlled_helicopter

    Original helicopter "classes" were based on the engine size. For example, a helicopter with a 0.30 cu in (4.9 cm 3) engine was a 30 class and a helicopter with a 0.90 cu in (14.7 cm 3) engine was referred to as a 90 class helicopter. The bigger and more powerful the engine, the larger the main rotor blade that it can turn and hence the bigger ...

  3. Model engine - Wikipedia

    en.wikipedia.org/wiki/Model_engine

    Four-stroke model engines have been made in sizes as small as 0.20 in3 (3.3 cc) for the smallest single-cylinder models, all the way up to 3.05 in3 (50 cc) for the largest size for single-cylinder units, with twin- and multi-cylinder engines on the market being as small as 10 cc for opposed-cylinder twins, while going somewhat larger in size ...

  4. Canadian Home Rotors Safari - Wikipedia

    en.wikipedia.org/wiki/Canadian_Home_Rotors_Safari

    The Safari is a two-seat light helicopter with a bubble canopy, a two-bladed main rotor and a skid landing gear. The aircraft structure consists predominantly of welded 4130 chromoly steel tubing. The kit provides the main and tail rotors, rotor hubs, transmission, engine, cockpit and tailboom completed. Builder construction is largely assembly ...

  5. Cox model engine - Wikipedia

    en.wikipedia.org/wiki/Cox_model_engine

    On February 7, 2009, Estes Industries stopped producing Cox engines and sold all of their remaining inventory – mainly spare parts – to several private buyers from Canada and the US. One of the new owners of the remaining Cox engine and parts inventory has launched a website [1] with an online store. After the bankruptcy of Hobbico in 2019 ...

  6. Millennium MH-1 - Wikipedia

    en.wikipedia.org/wiki/Millennium_MH-1

    The MH-1 was originally provided as a series of kits to upgrade old Mini-500 airframes, allowing the owner to modify them to MH-1 standards. The kits include a new Yamaha engine of 130 hp (97 kW), that replaces the Mini-500's 64 hp (48 kW) Rotax 582, plus a new mount for the Yamaha engine. The remaining kits cover modifications to the main ...

  7. Four-stroke engine - Wikipedia

    en.wikipedia.org/wiki/Four-stroke_engine

    The amount of power generated by a piston engine is related to its size (cylinder volume), whether it is a two-stroke engine or four-stroke design, volumetric efficiency, losses, air-to-fuel ratio, the calorific value of the fuel, oxygen content of the air and speed . The speed is ultimately limited by material strength and lubrication.

  8. Hughes OH-6 Cayuse - Wikipedia

    en.wikipedia.org/wiki/Hughes_OH-6_Cayuse

    Production model powered by a 263 kW (317 shp) Allison T63-A5A turboshaft engine. OH-6A NOTAR Experimental OH-6B Re-engined with 313.32 kW (420 shp) Allison T63-A-720 turboshaft engine. OH-6C Proposed version with 298 kW (400 shp) Allison 250-C20 turboshaft engine, fitted with five rotor blades. OH-6J Based on the OH-6A, for the JGSDF.

  9. Lycoming O-435 - Wikipedia

    en.wikipedia.org/wiki/Lycoming_O-435

    O-435-K1 (military designation O-435-4) Engine model with increased maximum continuous rating and the generator pad omitted, approved for helicopter installations. It produces 250 hp (186 kW) at 3000 rpm, with a compression ratio of 7.3:1, a dry weight of 405 lb (184 kg) and fitted with a Marvel MA-4-5 carburetor. Type certified on March 30, 1951.

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