B - Operations – Transporting – 63 – H
Patent
B - Operations, Transporting
63
H
244/120, 26/148,
B63H 1/26 (2006.01) B01F 15/00 (2006.01) F04D 29/38 (2006.01)
Patent
CA 1050355
ABSTRACT OF THE DISCLOSURE A propeller blade is rotatable about an axis of rotation and has a leading edge and a trailing edge. The blade has a configuration such that for any fixed point on the leading edge of the blade .gamma. has a maximum valueof 90°, and for any fixed point on the trailing edge .gamma. has a maximum value of Arc cotg [ (tg .beta.)3] wherein .gamma. is the angle between a radium extending from the axis of rotation to the fixed point and a vector from the fixed point in the direction of rotation of the blade, the vector lying in a plane which is perpendicular to the axis of rotation and which passes through the fixed point. the vector is normal to a section outline formed by the plane passing through the blade. .beta. is angle between the plane and the chord of a cylindrical profile or cross-section of the blade formed by an imagin- ary cylinder concentric to the axis of rotation and passing through the fixed point.
255130
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