| 摘要 |
In a rotary engine having rotating cylinders which burns a fuel which is not mixed with oil there is a real problem of centrifugal force form the rotating engine causing oil to flow into the combustion chambers. The disclosed rotary engine has oil reservoirs which are positioned radially outwardly from the pistons so that centrifugal force resulting from engine rotation tends to keep oil out of the combustion chambers. A helicopter utilising this rotary engine comprises: an aircraft body; a rotary engine having a housing containing an upright crankshaft which has a lower end portion rotatably attached above the aircraft body; a first main lifting rotor centrally attached to an opposite upper end portion of the crankshaft of the rotary engine; and, a second main lifting rotor attached to the housing of the rotary engine so that when the rotary engine is operating the first main lifting rotor is rotated in one direction, and the engine and the second main lifting rotor together tend to rotate in an opposite direction. A brake mechanism allows the relative rotational speed of the rotors may be controlled.
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