Title:
回転翼航空機
Document Type and Number:
Japanese Patent JP6721191
Kind Code:
B2
Abstract:
To enable flexible adjustment of the steering stability of a rotor craft against disturbances such as an updraft and the flight efficiency thereof.SOLUTION: The problem is solved by a rotor craft comprising a plurality of horizontal rotors, in which the plurality of horizontal rotors include large diameter propellers and small diameter propellers, which have different diameters, or large pitch propellers and small pitch propellers, which have different pitch angles. In the case where the large diameter propellers and the large pitch propellers are referred to as large lift propellers and the small diameter propellers and the small pitch propellers are referred to as small lift propellers, the large lift propellers and the small lift propellers are fixed pitch propellers whose lift is adjusted by controlling the rotation speed, and the small lift propellers are driven when the rotation speed of the large lift propellers falls below a predetermined threshold. The problem is solved also by a rotor craft in which, during flight, the rotation speed of large lift propellers can be lowered to a rotation speed or less where the gyro effect or lift thereof is lost.SELECTED DRAWING: Figure 1
Inventors:
Kiyoichi Sugaki
Application Number:
JP2018187735A
Publication Date:
July 08, 2020
Filing Date:
October 02, 2018
Export Citation:
Assignee:
Pro Drone Co., Ltd.
International Classes:
B64C27/10; B64C39/02
Domestic Patent References:
| JP4274995A |
Foreign References:
| CN105818970A | ||||
| KR101451646B1 |
Attorney, Agent or Firm:
Ueno patent office