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Engines need to be sonically tuned for maximum efficiency. Noise is very similar to that of a pulse jet engine , which could cause discomfort for passengers and people on the ground. Very high engine temperatures are a problem (the engine can glow bright orange which creates an obvious material problem).
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 ...
The Wright R-790 Whirlwind was a series of nine-cylinder air-cooled radial aircraft engines built by Wright Aeronautical Corporation, with a total displacement of about 790 cubic inches (12.9 L) and around 200 horsepower (150 kW).
The Affordaplane (sometimes written Afford-A-Plane) is an American plans-built, high wing, strut-braced, single engine, tractor configuration, conventional landing gear equipped ultralight aircraft for the US FAR 103 Ultralight Vehicles rules. Designed by Dave Edwards, it is intended for amateur construction. [1]
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The 230 hp (172 kW) engine gives the aircraft a sea level, standard day takeoff distance of 150 ft (46 m) and a landing distance of 300 ft (91 m). [ 1 ] [ 2 ] The V6 STOL has a typical empty weight of 1,200 lb (540 kg) and a gross weight of 2,200 lb (1,000 kg), giving a useful load of 1,000 lb (450 kg).
Model Aeronautical Press, 1966 (164 p). Outdoor Model Railways. Hemel Hempstead: Model and Allied Publications, 1970 (96 p). Rob Roy: how to build a simple 3 1/2 in. gauge 0-6-0 tank locomotive based on the dockyard engines of the old Caledonian Railway. Hemel Hempstead: Model and Allied Publications, 1972 (112 p). Rev ed: 1979.
Controlled combustion engine (CCE) is a term used by TechViki, an engine design company, to identify a type of experimental internal combustion engine (ICE) designed by Brad Howell-Smith. It uses two counter-rotating cams instead of a crankshaft. Pairs of cylinders oppose each other in a boxer flat engine or X engine arrangement.