For the propeller blade streamlined a high performance multi-blade propeller streamlined provided with such blades and arrangement of the tail rotor a helix for a rotary wing streamlined 371

摘要

Blade for shrouded propeller. / p & & p & according to the invention, this blade is characterized: - in that, in a plane, its aerodynamically active part has a rectangular shape; and - in that: / p & & p & gt. the maximal camber of the successive profiles constituting the active transport of the blade increases to a value close to 0 to a value close to 0,04; / p & & p & gt. — v of the cowling portion of the active blade decreases from a first value of about 12degre (s) to a second value close to 4degre (s), and then increases up to a third value close to 4,5degre (s); and / p & & p & gt. the relative maximum thickness of said successive profiles decreases to a value close to 13,5% to a value close to 9,5% / p & & p & embodiment of the faired propellers with high performance and in particular arrangement of the tail rotor for rotary wing aircraft.