Propeller system with electronically controlled cyclic and colle

Details Propeller system with electronically controlled cyclic and colle Propeller system with electronically controlled cyclic and colle

1985-09-10

1987-03-10

Basinger, Sherman D.

Ships

Submersible device

Having propulsion unit

440 50, 416 3, 416155, B63G 816

Patent

active

046483454

ABSTRACT:
A plurality of blades extend radially from a hub which is rotated by a motor about a drive axis. Each blade has a root which is rotatably connected to the hub so that it can be independently twisted to vary the pitch thereof relative to the drive axis. A plurality of electromagnets are annularly positioned adjacent the hub so that permanent magnets connected to the roots of corresponding blades can be attracted and/or repelled to induce twisting motion in the blades as the hub rotates about its drive axis. A control circuit receives input commands for a manual control device and causes predetermined electrical signals to be applied to the electromagnets for simultaneously varying the pitch of the blades. The pitch of the blades can be varied cyclically and collectively in accordance with any real continuous function, and not just sinusoidally as in the case of prior mechanical linkages employing swash plates. A vessel equipped with the propeller system at the fore and aft ends thereof can be precisely maneuvered in six degrees of freedom.

REFERENCES:
patent: 3101066 (1961-08-01), Haselton
William G. Wilson, "Effects of Configurational Changes on Tandem Propeller Performance," Cornell Aeronautical Laboratory Report No. AG-1634-V-9, Feb. 1966.
Roy S. Rice, Jr., "Experimental Studies of Tandem Propeller Performance at Static Conditions," Cornell Aeronautical Laboratory Report No. AG-2381-K-2, Feb. 1968.
F. R. Haselton, "Tandem Propeller Tailoring Technique," Naval Engineers Journal, Aug. 1965, pp. 621-624.
J. Cantwell & S. Cap "Computer Mission Simulation for Parametric Design of Undersea Vehicles," IEEE Ocean '75, pp. 860-869.
F. R. Haselton "Tandem Propeller in Review," J. Hydronautics, vol. 3, No. 4, Oct. 1969, pp. 161, 163, 165, 167.
Richard S. Brannin, "Tandem Propellers", pp. 37-44.

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