A water-jet drive is a propulsion system capable of generating great speed by shooting a stream of water astern.
Water-jet drives are used in high-speed boats.
The water-jet drive pumps water at great velocity through a nozzle pointing astern, propelling the boat forward. It consists of a water intake and hoses, an intake pump, a nozzle and, in some designs, deflectors for steering.
Nozzle and deflector design, and engine power must be considered when choosing a water-jet drive. These systems are efficient at high speed, but low-speed maneuvers are more difficult.
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