Water injection propulsion unit

Details Water injection propulsion unit Water injection propulsion unit

1991-05-15

1993-09-14

Swinehart, Edwin L.

Marine propulsion

Jet drive

Having means to increase fluid drive means efficiency

440 38, 114270, B63H 1100

Patent

active

052444252

ABSTRACT:
An arrangement is provided for variably adjusting the effective flow area along a region within a water injection propulsion unit. The invention is adapted to be embodied in a small watercraft of the type that is designed to be operated by a single rider sitting in straddle fashion on the watercraft. The flow area adjustments may be made in response to the value of a selected operating variable, or several variables, which may be measured during the operation of the watercraft. The invention allows attainment of optimum accelerability at low to medium speeds, and optimum accelerability and top speed at high speeds.

REFERENCES:
patent: 4176616 (1979-12-01), Robins

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