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Apparatus for determining apparent slip of marine motor vessel propellers, and method for doing same

  • US 5,928,040 A
  • Filed: 11/14/1997
  • Issued: 07/27/1999
  • Est. Priority Date: 11/14/1997
  • Status: Expired due to Fees
First Claim
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1. In an arrangement for determining apparent propeller slip wherein a motor and propeller are operatively associated with a marine vessel, the marine vessel being moved through the water under the influence of the propeller, the combination ofa vessel speed measuring mechanism attached to said vessel and including a sensor exposed to the water and converting the action of the water movement 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 gauge in said vessel including a microprocessor and a visual display,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, andsaid microprocessor incorporating an algorithm for processing and converting said electrical signals to said visual display on said gauge corresponding to apparent propeller slip.

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