| 主权项 |
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 body having:
a first side surface and an opposing second side surface, the first side surface contoured to act as a pressure surface of an airfoil and the second side surface contoured to act as a suction surface of an airfoil; anda leading and an opposing trailing edge, extending; and 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. |
