Title:
PROPELLER, FLYING OBJECT, AND PROPELLER MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/004387
Kind Code:
A1
Abstract:
Provided is a propeller including a plurality of blades which extend radially outward from a central rotary shaft and which have an edge on the opposite side from the central rotary shaft. The blades have a maximum elevation angle, which is the angle at which the elevation of the blades is at a maximum, at a position in the range of 30% to 60% of the radius of a circle centered on the central rotary shaft and passing through the edge of the blades, with the point of origin being the central rotary shaft. The change in the elevation angle along the lengthwise direction of the blades is within 10 degrees per 5% of the radius. The change in the maximum cross-sectional blade thickness, which is the maximum thickness of a cross section of the blades taken in a direction orthogonal to the lengthwise direction, along the lengthwise direction is within 20% of the maximum blade thickness of the blades per 5% of the radius. The change in the chord of the blades along the lengthwise direction is within 20% of the maximum chord of the blades per 5% of the radius.
Inventors:
OKADA MITSUSHI (JP)
Application Number:
PCT/JP2021/022859
Publication Date:
January 06, 2022
Filing Date:
June 16, 2021
Export Citation:
Assignee:
SONY GROUP CORP (JP)
International Classes:
B64C11/18; B64C27/467
Foreign References:
| JP2019025957A | 2019-02-21 | |||
| CN105584625A | 2016-05-18 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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