| 摘要 |
PURPOSE: A helicopter anti-torque tail rotor blade is provided to improve design of a free end of the blade and reduce acoustic emission of an anti-torque tail rotor. CONSTITUTION: A helicopter anti-torque tail rotor blade includes a leading edge(8), a trailing edge(9), and an end(14c). The trailing edge interacts with an air current of a rear part of the leading edge. The end is extended between a reference section(51) and a section(11) outside a radius direction for a rotation axis of the blade. Length of a cord at the end decreases as it goes from the reference section to the end. In the end, the leading edge and the trailing edge are combined. |
