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Topic: Propeller engine

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	Reference.com/Encyclopedia/Jet engine
		A jet engine is a type of air-breathing internal combustion engine often used on aircraft.
		The engine generates thrust because of the acceleration of the air through it—the equal and opposite force this acceleration produces is thrust.
		However, by approximately the late 1930s, engineers were beginning to realize that conceptually the piston engine was self-limiting in terms of the maximum performance which could be obtained from it; the limit was essentially one of propeller efficiency, which seemed to peak as blade tips approached supersonic radial velocity.
	www.reference.com /browse/wiki/Jet_engine (2994 words)

	Aircraft (Site not responding. Last check: 2007-11-04)
		Fixed-wing aircraft generally use an internal-combustion engine in the form of a piston engine(with a propeller) or a turbine engine (jet or turboprop), to provide thrust that moves the craft forward through the air.
		Exceptions are gliders which have no engines and gain their thrust, initially, from winches or tugs and then from gravity and thermal currents.
		Examples of engine lift aircraft are rockets, and so-called VTOL planes such as the Hawker Harrier.
	www.freedownloadsoft.com /info/aeroplanes.html (1552 words)

	Inboard Boat Propeller Shaft (Site not responding. Last check: 2007-11-04)
		Propeller propulsion developed first on inboard powered boats, using a long shaft to connect the engine to the...
		Inboard engine, inboard marine engine, inboard outboard engine
		inboard installation is quite complex, requiring a precisely aligned propeller shaft with its bearings, struts, and shaft log through the hull of the boat...
	www.1st-at-boats.com /boats-33/inboard-boat-propeller-shaft.html (783 words)

	v7ndotcom elursrebmem v7ndotcoms elursrebmems
		The two Bramo engines included one with a contra-rotating compressor assembly to reduce torque, which eventually was designated the "109-002", and a simpler engine without the contra-rotating fan scheme that was eventually designated the "109-003".
		The gasoline engine had an electric starter, but as a backup there was a pull-cord starter with the handle in a recess in the front of the bullet.
		The fact that production engines had been designed to minimize use of precious high-strength metals meant that the blades tended to rapidly lengthen or "creep", and the engines sometimes had to be junked after as little as ten hours of flight operations.
	www.toprankingcompany.com /me-262-schwalbe.htm (7047 words)

	aircraft electric propeller development (Site not responding. Last check: 2007-11-04)
		Assuming no change in propeller efficiency, to duplicate the...
		Constructing and flying them is a hobby that has been popular since the 1930s.
		In some designs of aircraft, the propeller is replaced...
	www.aircraft-parts.org /aircraft-electric-propeller-development.html (228 words)

	Latest Developments at Pure Energy Systems
		Project Commenced > Kneider's Wave Energy Propeller Engine - External fin system uses the energy of waves to provide thrust energy for the craft.
		Task is to identify and develop a version that can achieve widespread applicability in the marketplace -- finally, after 200 years.
		Open Sourcing > Stirling Engine -- Simplified Plans - Collection of proof of concept designs that you can build for as little as $99.
	www.pureenergysystems.com /newstuff (1274 words)

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