Underwater Jet Engine / Warp Drive

From: <Paul>
Date: Thu Jan 30 2003 - 21:21:00 EST

"The Pursuit Marine Drive produces thrust by using the energy from
high-pressure steam to draw in water through an intake at the front and expel it at high speed through the rear. The steam emerges at high speed from a rearward-facing ring-shaped nozzle into a cone-shaped chamber, where it mixes with the water (see graphic). Shock waves created as the steam condenses are focused by the chamber to blast water out of the back."


"This high-velocity capability - a kind of "warp drive" for water - is based
on the physical phenomenon of supercavitation. This fluid-mechanical effect occurs when bubbles of water vapor form in the lee of bodies submerged in fast-moving water flows. The trick is to surround an object or vessel with a renewable envelope of gas so that the liquid wets very little of the body's surface, thereby drastically reducing the viscous drag. Supercavitating systems could mean a quantum leap in naval warfare that is analogous in some ways to the move from prop planes to jets or even to rockets and missiles."

http://www.sciam.com/article.cfm?articleID=000CA29B-0EA6-1C70-84A9809EC588EF 21 Received on Thu Jan 30 21:21:00 2003

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