The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 2024
Filed:
Mar. 22, 2022
Applicant:
Piasecki Aircraft Corporation, Essington, PA (US);
Inventors:
Frederick W. Piasecki, Haverford, PA (US);
Dinesh Barwey, Chandler, AZ (US);
Shane A. Lewis, West Chester, PA (US);
Assignee:
Piasecki Aircraft Corporation, Essington, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B64C 27/82 (2006.01); B64C 27/26 (2006.01);
U.S. Cl.
CPC ...
B64C 27/82 (2013.01); B64C 27/26 (2013.01); B64C 2027/8227 (2013.01); B64C 2027/8236 (2013.01); B64C 2027/8272 (2013.01);
Abstract
A parking tail rotor for a rotary wing aircraft stops rotating at a high forward aircraft speed when aircraft control surfaces have adequate control authority to balance main rotor torque without the rotating tail rotor. When stopped, the blades of the parking tail rotor move due to the force of the relative wind to a parked position in which the span of the blades extend in the aft direction, reducing air resistance to the forward motion of the aircraft.