Rotor blade of a rotorcraft with reduced, acoustic properties

摘要

The aerodynamically profiled main part (21) of the blade comprises an external end part (31) which is adjacent to the blade tip (28) and extending along the span on a distance of at least 0, 2 r, where r is the radius of the rotor, the end part (31) being in the rear camber over a distance along the span of at least 0, 15, and the aerodynamically profiled main part (21) also comprises a front cambered part (32), immediately adjacent to the inside of the rear cambered end part (31). Application in particular to the equipment of the main rotors of helicopters.