Pump-jet

A pump-jet or water jet is a marine system that creates a jet of water for propulsion. The mechanical arrangement may be a propeller with nozzle, or a centrifug

Pump-jet
Typical 'jet ski' pump jet

A pump-jet or water jet is a marine system that creates a jet of water for propulsion. The mechanical arrangement may be a propeller with nozzle, or a centrifugal pump and nozzle.

Pump jets have some advantages over bare propellers for certain applications, usually related to requirements for high-speed.

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