Typical 'jet ski' pump jet
A pump-jet or water jet is a marine system that creates a jet of water for propulsion.
Design[]
The mechanical arrangement may be a ducted propeller with nozzle, or a centrifugal pump and nozzle. The jet can reach a speed up to 68 km/h
History[]
The first functioning pump-jet engine was created by New Zealand inventor, Bill Hamilton (engineer), as early as in 1954.
Advantages[]
Pump jets have some advantages over bare propellers for certain applications, usually related to requirements for high-speed or shallow-draft operations, etc. These include:
- Increasing the speed before the onset of cavitation, due to the raised internal dynamic pressure
See also[]
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