US 12,084,183 B2
Rotary wing aircraft with an asymmetrical front 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. 16, 2021, as Appl. No. 17/377,538.
Claims priority of application No. 20400025 (EP), filed on Dec. 14, 2020.
Prior Publication US 2022/0185466 A1, Jun. 16, 2022
Int. Cl. B64C 39/00 (2023.01); B64C 1/00 (2006.01); B64C 27/22 (2006.01)
CPC B64C 39/029 (2020.01) [B64C 1/0009 (2013.01); B64C 27/22 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A rotary wing aircraft that extends along an associated roll axis from a nose region to an aft region, the rotary wing aircraft comprising:
a fuselage with a front section and a rear section, wherein the front section forms a cabin for passengers and/or cargo and comprises a port side wall and a starboard side wall, the front section extending from the nose region to a transition area and the rear section extending from the transition area to the aft region,
a pusher propeller that is rotatably mounted to the rear section,
a main rotor that is rotatably mounted at the front section, and
at least one source of asymmetry that is connected in the direction of the associated roll axis between the nose region and the main rotor to the front section such that the front section comprises at least in sections an asymmetrical cross-sectional profile in the direction of the associated roll axis, wherein the at least one source of asymmetry is configured to generate sideward thrust for main rotor anti-torque from main rotor downwash, wherein the at least one source of asymmetry comprises an asymmetrically shaped upper deck of the rotary wing aircraft, wherein the asymmetrically shaped upper deck comprises an asymmetrically shaped upper starboard side wall extension, if the main rotor rotates in counterclockwise direction, for deviating main rotor downwash from the starboard side wall side toward the port side wall side of the fuselage, and wherein the asymmetrically shaped upper deck comprises an asymmetrically shaped upper port side wall extension, if the main rotor rotates in clockwise direction, for deviating main rotor downwash from the port side wall side toward the starboard side wall side of the fuselage.