Patent ID: 6227918
Filing Date: 2001-05-08
Classification: B63B,B63H,B63J,B64D,G01P,Y02T

Abstract:
In an arrangement for determining apparent propeller slip wherein a motor and propeller are operatively associated with a vessel moving through a fluid medium under the influence of the propeller, the combination ofa vessel speed measuring mechanism attached to said vessel and including a sensor exposed to the fluid medium and converting the action of the fluid medium against said sensor into an electrical signal,a motor speed measuring mechanism operationally associated with said motor for determining the revolutions per minute of said motor when under power, said motor speed measuring mechanism generating an electrical signal corresponding to the revolutions per minute of said motor,a console in said vessel including a microprocessor,operative connections between said sensor and said microprocessor and between said motor speed measuring mechanism and said microprocessor through which said electrical signals are transmitted to said microprocessor, said microprocessor incorporating algorithms for processing and converting said electrical signals to values for apparent propeller slip and propeller angle of attack.