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Patent Searching and Data


Title:
ROTOR BLADE, DRONE, AND HELICOPTER
Document Type and Number:
WIPO Patent Application WO/2017/145563
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 an inversely tapered part in a region from 50% to 90% in radius; (2) the rotor blade has a maximum chord length near the base, and the value thereof is at most twice the minimum value of the chord length within the range from 50% to 90% in radius; (3) the tip end gradually narrows; and (4) the angle of incidence of the base decreases toward the base.

Inventors:
HARADA MASASHI (JP)
Application Number:
PCT/JP2017/001030
Publication Date:
August 31, 2017
Filing Date:
January 13, 2017
Export Citation:
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Assignee:
JAPAN AEROSPACE EXPLORATION (JP)
International Classes:
B64C27/467; B64C39/02
Foreign References:
GB752080A1956-07-04
JP2009173152A2009-08-06
US5174721A1992-12-29
Attorney, Agent or Firm:
OMORI, JUNICHI (JP)
Omori Junichi (JP)
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