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Topic: Pistonless rotary engine

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	Steam Engine - Homo Digitalis
		Watt's version of this engine as developed and marketed from 1774 onwards in partnership with Matthew Boulton, was meant to improve efficiency through use of a separate condensing chamber immersed in a bath of cold water, connected to the working cylinder by a pipe and controlled by a valve.
		Vacuum engines, although in general limited in their efficiency, were at least relatively safe, use of very low pressure steam being preferable due to the primitive state of 18th Century boiler technology.
		It is possible to use a mechanism based on a pistonless rotary engine such as the Wankel engine in place of the cylinders and valve gear of a conventional reciprocating steam engine.
	homodigitalis.org /wikipedia-en.html?topic=Steam_engine (5691 words)

	Pistonless rotary engine at AllExperts
		A rotary engine is an internal combustion engine that does not use pistons in the way a reciprocating engine does, but instead uses one or more rotors, sometimes called rotary pistons.
		The basic concept of a (pistonless) rotary engine is to avoid the reciprocating motion of the piston with its inherent vibration and rotational-speed-related mechanical stress.
		In the MYT engine, the rotary pistons are toroid-sections (curved clinders sliding inside the toroidal stator) and connected to either of two inner discs.
	en.allexperts.com /e/p/pi/pistonless_rotary_engine.htm (1510 words)

	Steam Engine Encyclopedia Article @ Warmly.net (Site not responding. Last check: 2007-10-18)
		One of the advantages of the steam engine is that any heat source can be used to raise steam in the boiler; but the most common is a fire fueled by wood, coal or oil or the utilisation of the heat energy generated in a nuclear reactor.
		In early steam engines the piston is usually connected to a balanced beam, rather than directly to a connecting rod, and these engines are therefore known as beam engines.
		It is possible to use a mechanism based on a pistonless rotary engine such as the Wankel engine in place of the cylinders and valve gear of a conventional reciprocating steam engine.
	www.warmly.net /encyclopedia/Steam_engine (5745 words)

	Clinton Goveas :: Wikipedia Reference
		François Isaac de Rivaz, a Swiss inventor, designed the first internal combustion engine which was fuelled by a mixture of hydrogen and oxygen and used it to develop the world's first vehicle to run on such an engine.
		Although various pistonless rotary engine designs have attempted to compete with the conventional piston and crankshaft design, only Mazda's version of the Wankel engine has had more than very limited success.
		Rotary Wankel engines were introduced into road cars by NSU with the Ro 80 and later were seen in several Mazda models.
	www.clintongoveas.com /wikipedia/?title=Car (3921 words)

	Pistonless rotary engine - Wikipedia, the free encyclopedia
		A pistonless rotary engine is an internal combustion engine that does not use pistons in the way a reciprocating engine does, but instead uses one or more rotors, sometimes called rotary pistons.
		A rotary engine developed by Texas machinist Frank Turner which was licensed by Malcolm Bricklin for use in place of the V8 powering the Bricklin SV-1 vehicle, but never used.
		In the MYT engine, the rotary pistons are toroid-sections (curved clinders sliding inside the toroidal stator) and connected to either of two inner discs.
	en.wikipedia.org /wiki/Pistonless_rotary_engine (1778 words)

	rotary_engine (Site not responding. Last check: 2007-10-18)
		The rotary engine was an early type of internal combustion aircraft engine, used mostly in the years shortly before and during world war one.
		The engine was at this later 80 hp (60 kW) standard when WWI started, as the GnÃ´me Lambda, and the Gnome quickly found itself being used in a large number of aircraft designs.
		Planes that use Rotary engines however, have their propellars connected to the cylinders and crankcase while the "crankshaft" is mounted onto the airframe.
	www.cruisedates.com /wiki/?title=Rotary_engine (1761 words)

	PowerPedia:Steam engine - PESWiki
		Steam engines were used as the prime mover in pumps, locomotives, steam ships, traction engines, steam lorries and other road vehicles, and were essential to the Industrial Revolution.
		One of the advantages of the steam engine is that any heat source can be used to raise steam in the boiler; but the most common is a fire fueled by wood, coal or oil or the utilisation of the heat energy generated in a nuclear reactor.
		The steam turbine is a form of heat engine that derives much of its improvement in thermodynamic efficiency through the use of multiple stages in the expansion of the steam (as opposed to the one stage in the Watt engine), which results in a closer approach to the ideal reversible process.
	peswiki.com /index.php/PowerPedia:Steam_engine (5356 words)

	cars.webdict.info (Site not responding. Last check: 2007-10-18)
		Steam engines were used as the prime mover in pumps, locomotives, steam ships and steam tractors, and were essential to the Industrial Revolution.
		Most notably, without the use of a steam engine nuclear energy could not be harnessed for useful work, as a nuclear reactor does not directly generate either mechanical work or electrical energy—the reactor itself simply heats water.
		Similar advantages are found in a different type of external combustion engine, the Stirling engine, which offers efficient power in a compact engine, but which is difficult to operate over a wide range of operating conditions, difficulties which are readily addressed by the modern hybrid vehicle.
	cars.webdict.info /?w=Steam_engine (5339 words)

	petr.8m.com
		Large engines are usually multicylinder to reduce pulsations from individual firing strokes, with more than one piston attached to a more complex crankshaft; but many small engines, such as those found in mopeds or garden machinery, are single cylinder and use only a single piston, simplifying crankshaft design.
		The same engine, however, can be made to provide evenly spaced power pulses by using a crankshaft with an individual crank throw for each cylinder, spaced so that the pistons are actually phased 60 degrees apart, as in the GM 3800 engine.
		Such early vacuum, or condensing, engines are severely limited in their efficiency but are relatively safe since the steam is at very low pressure and structural failure of the engine will be by inward collapse rather than an outward explosion.
	johnshomebasedbuisnesses.bravehost.com /page4.htm (3446 words)

	Engine Tech
		In the Wankel engine, the four strokes of a typical Otto cycle engine are arranged sequentially around an oval, unlike the reciprocating motion of a piston engine.
		One of the first W engine was a W3, built by Anzani in 1906 to be used in their motorbikes.
		The Quasiturbine or Qurbine engine is a proposed pistonless rotary engine using a four-sided rhomboid rotor whose sides are hinged at the vertices.
	engine.blogsome.com (1018 words)

	Auto-World :: Pistonless rotary engine :: September :: 2006 (Site not responding. Last check: 2007-10-18)
		As of 2005 the Wankel engine is the only successful pistonless rotary engine, but many similar concepts have been proposed and are under various stages of development.
		Regarding the Wankel engine a disadvantage is also the large surface area of the combustion chamber that reperesents a large heat transfer and quench area, combined with an unfavorable shape of a long stretched rather thin combustion space necessitating long flame travel.
		In terms of the most popular Mazda family of engines, the 13B, this consists of two rotors displacing approximately 650 cc (cubic centimeters) each per rotor flank, a total of approximately 1300 cc or 1.3 l (liters).
	engine.blogsome.com /2006/09/05/pistonless-rotary-engine (1205 words)

	A better rotary engine
		Scissors-action engines have been proposed before, but Wittry's design provides a better linkage to keep the rotors moving in sync, cools the rotors more effectively and improves efficiency by letting the burning fuel that powers the engine push the rotor an extra distance each time the spark plug fires.
		Traditional internal combustion engines have pistons or rotors that move exactly as far on the compression stroke, which prepares the fuel-air mixture for firing, as they do on the expansion stoke, when the hot gas forces the piston down or the rotors to move.
		"This engine design overcomes the excessive fuel-consumption and pollution problems that were an inseparable part of an earlier rotary engine design, the Wankel engine used in Mazdas," he said.
	www.usc.edu /uscnews/stories/1299.html (665 words)

	Wankel_engine info here at en.assessment-development-training.info (Site not responding. Last check: 2007-10-18)
		The Wankel rotary machinery is a assemblage of internal combustion engine, inaugurated by German engineer Felix Wankel, which uses a rotor instead of reciprocating pistons.
		In the Wankel engine, the four strokes of a everyday Otto cycle machinery are arranged sequentially an oval, hostile the reciprocating tendency of a piston engine.
		Further engineering striving by Mazda brought these hots baptize control, but the concourse was before elongated resisted with a sudden ecumenical responsibility up both hydrocarbon emission a piling up in the charge of gasoline, the two best sincere checks of the Wankel engine.
	en.assessment-development-training.info /Wankel_engine (3126 words)

	Wankel engine Summary
		Thus, power output of a Wankel engine is generally higher than that of a four-stroke piston engine of similar engine displacement in a similar state of tune, and higher than that of a four-stroke piston engine of similar physical dimensions and weight.
		The design of the Wankel engine requires numerous sliding seals and a housing that is typically built as a sandwich of cast iron and aluminum pieces that expand and contract by different degrees when exposed to heating and cooling cycles in use.
		This problem was solved by limiting the engine speed to only 1200 rpm and use of natural gas as fuel; this was particularly well chosen, as one of the major uses of the engine was to drive pumps on natural gas pipelines.
	www.bookrags.com /Wankel_engine (3510 words)

	Comments (Site not responding. Last check: 2007-10-18)
		Engines of this type always have multiple cylinders in an inline arrangement and may be single or double acting.
		While these engines had the typical rods connecting the drive wheels they had no driving rods or cylinders, and no valve links or reversing gear, appearing strangely incomplete to most observers.
		In theory, it might be possible to use a mechanism based on a pistonless rotary engine such as the Wankel engine in place of the cylinders and valve gear of a conventional reciprocating steam engine.
	orange-lover.blogdrive.com /comments?id=9 (415 words)

	Reference.com/Encyclopedia/Quasiturbine
		As well as an internal combustion engine, the Quasiturbine has been proposed as a possible pump design, and demonstrated as a pneumatic engine using stored compressed air and as a steam engine.
		Sixteen strokes per revolution of the rotor, as opposed to twelve for a single-rotor Wankel engine and two for a revolution of the crankshaft of a single-cylinder single-acting piston engine.
		This resembles detonation, as used in the Bourke engine, akin to knocking and pinging undesireable in common internal combustion engines.
	www.reference.com /browse/wiki/Quasiturbine (1057 words)

	Mazda Cosmo Sport 110S: An Under-Apprectiated Classic - Popular Mechanics
		The rotary was the brainchild of Felix Wankel, a self-taught German tinkerer who never went to college.
		For a while in the '60s, it looked to some like the rotary would be the engine: light, small and only a handful of parts.
		So, at the car show, the poor little Mazda Cosmo sat alone in a corner, with its strange rotary engine and styling that was a mixture of American and Italian with a few Japanese elements thrown in.
	www.popularmechanics.com /automotive/jay_leno_garage/2629006.html (723 words)

	Rotary Engine Diagram (Site not responding. Last check: 2007-10-18)
		Mr Dugald Clerk's original two-stroke cycle engine is indicated roughly, as regards principle, by the accompanying diagram, from which it will be seen that.
		The Rand Cam Rotary Diesel engine is perhaps the main alternative to the.
		The basic concept of a (pistonless) rotary engine is to avoid the reciprocating.
	rotary-engine.vd0.info /rotary-engine-diagram.htm (496 words)

	The Alternate Engine/Fuel/Energy Source Issue
		Most notable was the gas turbine engine.......a pistonless engine using much lower quality fuels....and exemplified in first turbo prop airplanes, then in turbo jet planes.
		The increasingly popular rotary engine was found to be a fuel guzzler...
		Operating basically as a two cycle engine, the rotary engine had similar exhaust issues (even without the oil mixed gasoline) because of tip seal leakage.
	journals.aol.com /outsider8413/CarsEnginesRacingAutoIndustryand/entries/2006/06/06/the-alternate-enginefuelenergy-source-issue/165 (1195 words)

	Rotary Engine Performance
		Monumental engineering text covers vertical flight, forward flight, performance, mathematics of rotating systems, rotary wing dynamics rotary engine performance and aerodynamics, aeroelasticity, stability rotary engine performance and control, stall, noise rotary engine performance and more.
		Pistonless rotary engine - A rotary engine is an internal combustion engine that does not use pistons in the way a reciprocating engine does, but instead uses one or more rotors, sometimes called rotary pistons.
		Rotary engine - The rotary engine was a common type of internal combustion aircraft engine in the early years of the 20th century.
	im82.goednieuwskrant.com /rotaryengineperformance.html (775 words)

	Rotary combustion engine - WOI Encyclopedia Italia
		A rotary engine developed by Texas machinist Frank Turner which was licensed by Malcolm Bricklin for use in place of the V8 powering the Bricklin SV-1 vehicle, but never used.
		The Wankel produces twelve strokes per revolution of the rotor (although the spindle rotates a little more rapidly than the rotor), as opposed to two strokes for each crankshaft rotation of a single-cylinder single acting piston engine, or four strokes for a double-acting cylinder such as found in some steam engines.
		A two-rotor design has been adopted by Mazda Wankel engine to further reduce vibration, and three- and four-rotor designs have been used in racing, notably the 4-rotor Mazda 26B engine that powered the winning car in the 1991 24 Hours of Le Mans race.
	www.wheelsofitaly.com /wiki/index.php?title=Rotary_combustion_engine&redirect=no (1061 words)

	Jay Leno's Garage
		With no pistons, crankshaft, camshaft or valvetrain, Wankel's rotary engine seemed destined to be the internal-combustion engine of the future.
		But even at their best, rotaries were never noted for their fuel economy.
		An Under-Appreciated Classic: the Mazda Cosmo Sport 110S A strange, pistonless engine in a strange-looking sports car proves to be an irresistible combination.
	www.jaylenosgarage.com /archive/cosmo_shell2.shtml (695 words)

	Favourite type of engine configuration? - SportsCarForums.com
		The Rotary is my favourite there, its capable of rather large power out puts to their displacment, as well as the lack of moving parts.
		I also like the flat engine configuration for the lower center gravity also it is ment to be able to take more boost without breaking.
		The V engine is pretty good as well, its common, compact and can be configured to be shorter and wider or taller and thiner.
	www.sportscarforums.com /f13/favourite-type-engine-configuration-13459.html (570 words)

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