Thrust-drag instrumentation for power boat

Details Thrust-drag instrumentation for power boat Thrust-drag instrumentation for power boat

1988-08-29

1990-06-19

Peters, Jr., Joseph F.

Marine propulsion

With indicator

7386229, 7386249, B60L 114

Patent

active

049349708

ABSTRACT:
A propeller driven propulsion unit is pivotably mounted upon the transom of a boat. A fluid operated cylinder having an extendable shaft is mounted between the propulsion unit and the transom so that at least a portion of the thrust developed by the propeller is transmitted back to the boat through the cylinder. Accordingly, changes in propeller thrust produce changes in the fluid pressure acting on the cylinder. A pump provides fluid to the cylinder to either extend or retract the shaft to adjust the position of the unit. The pressure of the fluid in the cylinder is measured by a guage which is calibrated to convert pressure readings into thrust readings. This thrust information is used by the boat operator to adjust the boat trim or make other adjustment that provide for more efficient and safer boat operations.

REFERENCES:
patent: 2517038 (1950-08-01), Sheffield
patent: 2641926 (1953-06-01), Eisenbart
patent: 2681565 (1954-06-01), Kelk
patent: 4605375 (1986-08-01), Ferguson

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