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1. 发明专利

JPH037190A HELICOPTER TOOL 失效
公开(公告)号：JPH037190A
公开(公告)日：1991-01-14
申请号：JP14347789
申请日：1989-06-06
申请人： WAIRUDO GIYAA KK
发明人： OSAWA KENICHI , KISHI TAKESHI
IPC分类号： A63H27/127 , A63H27/133 , B64C11/34
摘要： PURPOSE:To have stable fall after however high a helicopter toy has risen, by introducing a plus pitch to put afloat the angle of incidence of each rotary wing when power is transmitted from a drive motive, and altering to a minus pitch for sinking the angle of incidence when power supply is shut. CONSTITUTION:An angle-of-incidence changing means 4 is arranged on the power part 2 of a flying body 1, and for ex. three rotary wings 3 are borne by this changing means 4 rotatably and with possibility of changing the pitch. When the flying body 1 is rising, power is transmitted from a drive motive, and a buoyancy is generated by introducing a plus pitch for putting afloat the angle of incidence of the rotary wings 3 by the mentioned angle-of-incidence changing means 4. When the power from the drive motive goes out, power transmission is disengaged, and the changing means 4 changes the angle of incidence to a minus pitch for falling. The rotary wings 1 rotate with a torque due to inertia, and the flying body moves in the sinking direction, and a torque in the rising direction is added due to the stream of the air, and thus rotation continue even when the inertia force goes out.

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