| 摘要 |
PROBLEM TO BE SOLVED: To enable the smooth and stable linear flight of a propeller airplane without requiring turning motion at the time of taking off from the water or the ground. SOLUTION: By a counter-rotating propeller, twisted propeller wash is prevented. The counter-rotating propeller uses a planetary gear mechanism, and drives a normally rotating propeller by a planetary carrier and a reversely rotating propeller by a sun gear so as to rotate the normally rotating propeller and the reversely rotating propeller in reverse directions. COPYRIGHT: (C)2007,JPO&INPIT
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