Patent ID: 6361279
Filing Date: 2002-03-26
Classification: B64C,Y10S

Abstract:
A blade profile for a rotor craft rotor comprising:between a leading edge and a trailing edge, an extrados and an intrados having a camber c defined by the geometrical locus of points equidistant from them; wherein the ratio of the maximal camber to the maximal thickness varies as a linear function of the relative thickness of the profile, said function being represented by the equation â€ƒ(c/C)max/ (e/C)max=a3+b3(e/C)max â€ƒwherein: C is the length of the chord of the profile, c is the camber of the profile, e is the thickness of the profile, a3 and b3 are coefficients having respective values determined such that said ratio is in a range 0.13 to 0.19 for a relative thickness of 7% of the length C of the chord.