Patent ID: 8814078
Filing Date: 2014-08-26
Classification: B64C,Y02T

Abstract:
1. A rotary aircraft, comprising: a fuselage; an engine carried by the fuselage; a rotor rotatably attached to the engine; and a tail boom rotatably attached to and extending from the fuselage, the tail boom being configured to rotate about a longitudinal axis relative to the fuselage during flight to manipulate rotorwash, the tail boom having: a flap pivotally attached to the trailing edge of the tail boom; wherein the engine rotates the rotor, thereby creating downward rotorwash and thereby exerting a torque on the fuselage; wherein the rotorwash flows around the first side surface and the second side surface of the tail boom, resulting in a high-pressure region forming near the first side surface and resulting in a low-pressure region forming near the second side surface; wherein the pressure difference between the high-pressure region and the low- pressure region causes the tail boom to move towards the low-pressure region, resulting in a lateral force opposing the torque on the fuselage; wherein the flap is configured to further control the flow of rotorwash with a surface contouring, thereby manipulating the directional movement of the rotorwash flowing around the tail boom; an anti-torque system attached to the tail boom; and wherein the anti-torque system is a tail rotor.