Word: hydrocket
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...small jet-propulsion unit for planing hulls up to 22 ft. in length is Aerojet-Generals Hydrocket. This device scoops water through an intake duct and feeds it into an engine-driven impeller. Centrifugal force shoots the water through perforations in the impeller at high speed, driving the boat forward. Aerojet-General claims speeds of 40 m.p.h. for an 18-ft. hull. Price...
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