Title:
ROTOR BLADE, DRONE, AND HELICOPTER
Document Type and Number:
WIPO Patent Application WO/2017/146028
Kind Code:
A1
Abstract:
[Problem] To be able to provide a high figure of merit and increase flight time and payload weight when used, for example, in a drone or a helicopter. [Solution] A rotor blade 1 has a solidity of 10% or less. The shape of the rotor blade 1 is as follows: (1) the rotor blade has a maximum chord length near the base, and the value thereof is at least twice the minimum value of the chord length within a range from 50% to 90% in radius; (2) the tip end gradually narrows; and (3) the angle of incidence of the base decreases toward the base within a region from around 30% or less in radius.
Inventors:
HARADA MASASHI (JP)
Application Number:
PCT/JP2017/006310
Publication Date:
August 31, 2017
Filing Date:
February 21, 2017
Export Citation:
Assignee:
JAPAN AEROSPACE EXPLORATION (JP)
International Classes:
B64C27/467; B64C39/02
Foreign References:
| GB752080A | 1956-07-04 | |||
| JP2009173152A | 2009-08-06 | |||
| US5174721A | 1992-12-29 |
Attorney, Agent or Firm:
OMORI, Junichi (JP)
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