US 11,738,860 B2
Compound helicopter
Wataru Kobayashi, Tokyo (JP); Hirotaka Hayashi, Tokyo (JP); Mizuki Nakamura, Tokyo (JP); and Masafumi Sasaki, Tokyo (JP)
Assigned to SUBARU CORPORATION, Tokyo (JP)
Filed by SUBARU CORPORATION, Tokyo (JP)
Filed on May 4, 2021, as Appl. No. 17/307,409.
Claims priority of application No. 2020-095178 (JP), filed on Jun. 1, 2020.
Prior Publication US 2021/0371090 A1, Dec. 2, 2021
Int. Cl. B64C 27/26 (2006.01)
CPC B64C 27/26 (2013.01) 19 Claims
OG exemplary drawing
 
1. A compound helicopter comprising:
a fuselage;
a fixed wing fixed to the fuselage;
a rotary wing rotatably coupled to the fuselage; and
a barrier member attached to a part, of the fuselage, that is above the fixed wing and is between the rotary wing and the fixed wing,
wherein at least a part of a lower surface of the barrier member is facing an upper surface of the fixed wing and is exposed to an upwash from the fixed wing during forward flight of the compound helicopter,
wherein at least a part of an upper surface of the barrier member is exposed to a downwash from the rotary wing during the forward flight of the compound helicopter,
wherein the barrier member includes a front end, a rear end, and a cross-section that is symmetrical about a plane coupling the front end and the rear end to each other, and
wherein, upon a forward flight at a predetermined speed, an angle of attack of the barrier member is zero degrees.