Two-Stroke Engine
The two stroke engine has been the main stay of powered model aircraft for a number of years due to the high power to weight ratio. The main downfall of the two-stroke engine is the high fuel consumption.
Two-stroke: The cycle of operations of an internal-combustion engine which has a power stroke in each cylinder for every revolution of the crankshaft.
Two-stroke engines fire once every revolution, while four-stroke engines fire once every other revolution. This gives two-stroke engines a significant power boost.
The two-strokes fall somewhere between these two categories. With no definitions to which they must adhere, it is important to know what new parts went into the engine. Fortunately, with two-strokes the overhaul process is much simpler. But,.
Hargrave with his Engine No.35, single-cylinder two-stroke petrol engine driving twin 'flappers', 1908
Hargrave compressed air powered 'quadraplane' ...
 See also: Aviation, Flight, Power, Course, Performance
  
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