Blade helicopter improved, the head comprises a combination selected to deport in the plane of rotation, and of thread taper angle of diedre lateral negative in order to improve the efficiency in flight

摘要

P the invention relates to a blade of helicopter improved. / p & & p & this blade 14 comprises a leading edge 24, a trailing edge 26, a heel 16 joined to the hub 12 of the rotor of a helicopter to rotate with the hub about an axis, a central portion 18 has a profile aerodynamic selected and a head 20 extending over about 7 of the radius of the blade 14, this head 20 presents a deport towards the rear for reduce the speed of the air in the direction of its chord, as well as a thread taper calculated of such a way that the size of the rope at its outer end or a low pressure at the same half to that existing in the enclosed end. / p & & p & the invention is used to monitor the vortex generated at the trailing edge of the head of a blade of helicopter and improve the efficiency in hovering flight. / p