US 12,319,400 B2
Aircraft propulsion system and methods of feathering
Jean Thomassin, Ste Julie (CA); Pierre Bertrand, Sherrington (CA); Todd A. Spierling, Rockford, IL (US); and Chad M. Henze, Granby, CT (US)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by Pratt & Whitney Canada Corp., Longueuil (CA)
Filed on Dec. 3, 2020, as Appl. No. 17/110,792.
Claims priority of provisional application 62/942,969, filed on Dec. 3, 2019.
Prior Publication US 2021/0300574 A1, Sep. 30, 2021
Int. Cl. B64D 27/02 (2006.01); B64C 11/00 (2006.01); B64D 27/24 (2006.01)
CPC B64C 11/002 (2013.01) [B64D 27/24 (2013.01); B64D 27/026 (2024.01)] 13 Claims
OG exemplary drawing
 
1. An aircraft propulsion system comprising:
a first airmover and a second airmover disposed coaxially;
an electric motor configured to power the first airmover, wherein the first airmover includes a propeller having at least a first position configured to provide thrust to the aircraft and a second position configured to recharge a power source, wherein the second position is a reverse windmilling position in which at least one blade of the propeller is rotated about a blade axis by at least 90 degrees with respect to an operating position, the operating position corresponding to the first position configured to provide forward thrust to the aircraft, wherein the blade axis is a span-wide axis extending through an airfoil of the at least one blade; and
a heat engine configured to directly power the second air mover.