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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 ...
These engines have a fixed compression ratio, but the compression can be altered slightly with the use of more or less lubrication oil in the fuel. Also the engine's load affects the compression and ignition timing. Larger propellers give a longer combustion time and so higher compression.
The engine was designed for the 1/2A Texaco RC duration competition. The engine has an additional fin on the larger glow plug which dissipates heat better allowing the engine to swing a larger propeller. i.e. 7 or 8 inches. This engine has a red 8cc fuel tank and a black crankcase. Original 1989 engines did not come out with 5 fin glow plug.
In the world of model aircraft there are several competition classes to signify engine displacement. Class Cubic Inches Cubic Centimeters 1/2A: 0.000 - 0.050
Various scale sizes of RC scale aircraft have been built in the decades since modern digital-proportional, miniaturized RC gear came on the market in the 1960s, and everything from indoor-flyable electric powered RC Scale models, to "giant scale" RC Scale models, in scale size ranges that usually run from 20% to 25%, and upwards to 30 to 50% ...
Engine size is related to the class of car; 1/10 scale on and off-road vehicles usually are equipped with .12–.18 cubic inch engines, with 1/8 scale vehicles using .21–.32 cubic inch engines. There are exceptions, with many Schumacher and Thunder Tiger/Team Associated RC models being good examples of unusually large engines coming as ...
Windsor Propeller is an American manufacturer of propellers and accessories for hobby model aircraft and unmanned aerial vehicles (UAVs). Founded in 1978 in Windsor , Northern California by Fred Jamieson, the company is developing and manufacturing its products under the brand name Master Airscrew.
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 ...
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