Disclosed is a design for high efficiency double pitch angle propellers, having a propeller hub, and two or more propeller blades with airfoil-shaped cross-section fixed around the periphery of the hub at equal angles. The blades have a geometric pitch angle together with the rotation direction as well as a second pitch angle that forms an acute angle or a wide angle with respect to the rotation axis, from its frontal side. The advantage of the second pitch angle is that it has no torque effect on the motor as there is not any force component on the rotation direction. Therefore for the additional pitch obtained from the second pitch angle. The propeller does not attract extra energy from the motor.
DOUBLE PITCH ANGLE PROPELLERS
2019-02-28
Patent
Electronic Resource
English
Engineering Index Backfile | 1919
|Engineering Index Backfile | 1950
Engineering Index Backfile | 1942
SAE Technical Papers | 1929
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