US 11,655,021 B2
Rotary wing aircraft with an asymmetrical rear section
Rupert Pfaller, Riemerling (DE); and Tobias Ries, Nordendorf (DE)
Assigned to AIRBUS HELICOPTERS DEUTSCHLAND GMBH, Donauworth (DE)
Filed by AIRBUS HELICOPTERS DEUTSCHLAND GMBH, Donauworth (DE)
Filed on Jul. 15, 2021, as Appl. No. 17/376,576.
Claims priority of application No. 20400024 (EP), filed on Dec. 14, 2020.
Prior Publication US 2022/0185465 A1, Jun. 16, 2022
Int. Cl. B64C 27/82 (2006.01); B64C 1/00 (2006.01); B64C 27/06 (2006.01)
CPC B64C 27/82 (2013.01) [B64C 1/0009 (2013.01); B64C 27/06 (2013.01); B64C 2027/8236 (2013.01); B64C 2027/8272 (2013.01); B64C 2027/8281 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A rotary wing aircraft that extends along an associated roll axis between a nose region and an aft region and that comprises a fuselage with a front section and a rear section, the rotary wing aircraft comprising:
a main rotor that is rotatably mounted at the front section,
a shrouded duct that is arranged in the aft region, and
a propeller that is rotatably mounted to the shrouded duct,
wherein the rear section extends between the front section and the shrouded duct and comprises an asymmetrical cross-sectional profile in direction of the associated roll axis,
wherein the rear section is configured to generate sideward thrust for main rotor anti-torque from main rotor downwash, and
wherein the front section comprises a port side wall and a starboard side wall, and wherein the rear section extends in prolongation to one of the port side wall or the starboard side wall.