| 摘要 |
PROBLEM TO BE SOLVED: To provide a Take Tombo (bamboo-copter) that can be easily retrieved. SOLUTION: The Take Tombo consists of a propeller part and a rotary shaft having an upper end fixed to the central part of the propeller part, and has a flying direction inversion part constituted by forming the lower side of the rotary shaft part heavier than the upper side attached with the propeller part. The flying direction inversion part is preferably provided with a lower-side part having a diameter larger than that of the upper side from a substantially central part of the rotary shaft part, and preferably, the lower end part of the rotary shaft part is gradually contracted toward the lower end. COPYRIGHT: (C)2009,JPO&INPIT
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