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pump-jet propulsion unit

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  • 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 ducted propeller with nozzle, or a centrifugal pump and nozzle. The first functioning pump jet engine was created by New… …   Wikipedia

  • Jet engine — For a general overview of aircraft engines, see Aircraft engine. A Pratt Whitney F100 turbofan engine for the …   Wikipedia

  • Jet engine performance — This article describes how jet engine performance is estimated during the design phase. Similar techniques are used once the engine has been built and is being tested, except the performance of individual components, rather than being assumed, is …   Wikipedia

  • Auxiliary power unit — An auxiliary power unit (APU) is a device on a vehicle whose purpose is to provide energy for functions other than propulsion. Different types of APU are found on aircraft, as well as on some large ground vehicles.AircraftFunctions of APU The… …   Wikipedia

  • Outboard motor — Basic parts of an outboard motor Bolinder s two cylinder T …   Wikipedia

  • Type 041 submarine — The Type 041 submarine [http://mil.news.sina.com.cn/p/2007 07 18/0727455216.html] (Nato code name Yuan class) is the newest class of diesel electric submarine in the People s Liberation Army Navy (as of 2007). This class was first launched at… …   Wikipedia

  • Borei class submarine — Russian Borei class submarine Yuriy Dolgorukiy on sea trials Class …   Wikipedia

  • USS Witek (DD-848) — USS Witek (DD/EDD 848) was a (CVS 32) and the atomic submarine USS|Nautilus|SSN 571|2; other carriers with which Witek operated included USS|Antietam|CVS 36|2 and USS|Randolph|CVA 15|2.Besides carrying out operational tests of ASW electronics… …   Wikipedia

  • gas-turbine engine — Introduction       any internal combustion engine employing a gas as the working fluid used to turn a turbine. The term also is conventionally used to describe a complete internal combustion engine consisting of at least a compressor, a… …   Universalium

  • Internal combustion engine — The internal combustion engine is an engine in which the combustion of a fuel (normally a fossil fuel) occurs with an oxidizer (usually air) in a combustion chamber. In an internal combustion engine, the expansion of the high temperature and high …   Wikipedia

  • Rocket engine — RS 68 being tested at NASA s Stennis Space Center. The nearly transparent exhaust is due to this engine s exhaust being mostly superheated steam (water vapor from its propellants, hydrogen and oxygen) …   Wikipedia

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