Title:
PROPELLER, POWER ASSEMBLY, AND AIRCRAFT
Document Type and Number:
WIPO Patent Application WO/2020/000686
Kind Code:
A1
Abstract:
A propeller (100). The angle of attack of a blade (20) is 18.62°+/-2.5° at 44.0% of the radius of the propeller (100) from the center of a propeller hub (10); the angle of attack of the blade (20) is 17.58°+/-2.5° at 52.0% of the radius of the propeller (100) from the center of the propeller hub (10); the angle of attack of the blade (20) is 15.05°+/-2.5° at 68.0% of the radius of the propeller (100) from the center of the propeller hub (10); the angle of attack of the blade (20) is 13.54°+/-2.5° at 76.0% of the radius of the propeller (100) from the center of the propeller hub (10). Also provided are a power assembly and an aircraft. Use of the propeller (100) having the blade (20) with a gradually-changed airfoil profile can enable the propeller (100) to be at the optimal working section at each section along an extension direction of the blade (20), so that noise generated during operation of the blade (20) is reduced, the aircraft (1000) is more quiet when hovering, and user experience is improved; moreover, the air resistance is reduced, the tensile force and the efficiency are improved, the flying distance of the aircraft (1000) is increased, and the flight performance of the aircraft (1000) is improved.
Inventors:
LIN JIAJING (CN)
CHEN PENG (CN)
CHEN PENG (CN)
Application Number:
PCT/CN2018/106088
Publication Date:
January 02, 2020
Filing Date:
September 18, 2018
Export Citation:
Assignee:
SZ DJI TECHNOLOGY CO LTD (CN)
International Classes:
B64C11/20; B64C27/32
Foreign References:
| CN205366054U | 2016-07-06 | |||
| CN206155775U | 2017-05-10 | |||
| CN206954495U | 2018-02-02 | |||
| JP3472799B2 | 2003-12-02 | |||
| DE2712717A1 | 1978-09-28 |
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