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Topic: Rotary engine

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	Rotary Engine Theory - 100 hp Gnome Monosoupape
		It was in 1907 that his 7-cyl rotary was born - and it came to be known as the Gnome.
		That the rotary engine dominated the early years of aviation is evident - although there were some very fine engines extant such as the twins of Duthiel-Chalmers and Darracq, the Antoinette by Levavasseur, and those of Fiat.
		However, the engine also delivered sharp torque reversals when the ignition was cut which was tough on the engine mounts and the airframe.
	www.aviation-history.com /engines/rotary-theory.htm (1174 words)

	Howstuffworks "How Rotary Engines Work"
		A rotary engine is an internal combustion engine, like the engine in your car, but it works in a completely different way than the conventional piston engine.
		A rotary engine does these same four jobs, but each one happens in its own part of the housing.
		The rotary engine (originally conceived and developed by Dr. Felix Wankel) is sometimes called a Wankel engine, or Wankel rotary engine.
	auto.howstuffworks.com /rotary-engine.htm (190 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.
		Wittry said his improved engine is as efficient as a diesel, but far quieter and nearly vibration free.
	www.usc.edu /uscnews/stories/1299.html (657 words)

	Howstuffworks "Rotary Engine Power"
		Rotary engines use the four-stroke combustion cycle, which is the same cycle that four-stroke piston engines use.
		This is roughly the equivalent of the pistons in a piston engine.
		The neat thing about the rotary engine is that each of the three faces of the rotor is always working on one part of the cycle -- in one complete revolution of the rotor, there will be three combustion strokes.
	auto.howstuffworks.com /rotary-engine4.htm (584 words)

	MazdaUSA :: Mazda RX-8 :: Sports Car (Site not responding. Last check: 2007-11-07)
		The RENESIS rotary engine is what gives the Mazda RX-8 the power to own the road.
		The Mazda RX-8's compact RENESIS engine is mounted low and behind the front axle as part of its front mid-ship chassis layout.
		Engineers thought far outside of the sports car box with this extraordinary vehicle.
	www.mazdausa.com /MusaWeb/displayPage.action?pageParameter=modelsMain&vehicleCode=RX8 (1289 words)

	Welcome to Coates International Ltd.
		A conventional piston engine ignites the fuel and air mixture in the combustion cycle and evacuates the gas by-products in the exhaust cycle.
		In addition, the spherical rotary valve combustion engine utilizes a proprietary seal at the intake and exhaust ports of the cylinder to prevent pressure leakage.
		Poppet valve engines almost always exceed a temperature of 2,500 degrees F which in turn, at such high temperatures, produce oxides of nitrogen which are visible as "smog" over cities such as Los Angeles, etc. The inlet poppet valve stems induct oil through the induction valve guides.
	www.coatesengine.com /technology.html (0 words)

	Rotary Steam Engines.
		A rotary steam engine, that used the expansion of steam to generate shaft rotation directly, promised to be far more compact, exactly as the Wankel rotary engine was intended to revolutionise the internal-combustion engine.
		This is Coomber's Rotary Engine from 1876, devised by Mr.
		This is not encouraging; piston engines do not require regular adjustments to their piston rings, and here we get a clue as to one of the problems of the rotary engine- its geometry is an inherent weakness, because you would have to take up wear in several directions at once.
	www.dself.dsl.pipex.com /MUSEUM/POWER/rotaryengines/rotaryeng.htm (0 words)

	Wankel engine - Wikipedia, the free encyclopedia
		In the Wankel engine, the four strokes of a typical Otto cycle occur in the space between a somewhat triangular shaped rotor and the inside of a housing.
		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.
		Rotary engine enthusiasts refer to piston aircraft engines as "Reciprosaurs," and point out that their designs are essentially unchanged since the 1930s, with only minor differences in manufacturing processes and variation in engine displacement.
	en.wikipedia.org /wiki/Wankel_engine (3357 words)

	Ceramic Rotary Engine (Site not responding. Last check: 2007-11-07)
		The efficiency of this engine will be improved dramatically compared with a metal rotary engine because of a significantly improved combustion process and a large reduction in waste heat rejection.
		The engine also promises a reduced impact on the environment as a result of less carbon-dioxide emission (because less fuel is burnt) and, in general, less pollutants in the exhaust owing to the high combustion temperatures within the engine.
		The potential for the ceramic rotary engine is obvious in terms of reduced expenditure for the consumer, reduced impact on the environment, and conservation of natural resources for the oil producers.
	www.ultrahardmaterials.co.uk /ceramic_rotary_engine.htm (0 words)

	Rotary Pulse Jet Engine (Site not responding. Last check: 2007-11-07)
		The basic design of the Rotary Pulse jet engine is extremely simple and would require only 40% of the parts needed in a conventional IC engine.
		The rotor and shaft inclusive of the pistons could be made far lighter than the weight needed to be moved in a conventional engine such as the crankshaft, fly-wheel, cam-shaft, connecting rods and so on, thereby giving the engine a much greater size to power ratio.
		The Rotary Pulse Jet Engine is very simple in design, it consists of a rotor, enabled for movement in one direction only, fixed to an axle of which it is an integral part, revolving inside an outer housing.
	conceptengine.tripod.com /conceptengine/id2.html (0 words)

	04.02.2001 - UC Berkeley researchers create world's smallest rotary internal combustion engine
		Like the engine in your car, the mini engine produces motion from controlled combustion, which takes place when a fuel such as gasoline is combined with oxygen and a spark in a chamber.
		Called a rotary engine or Wankel engine after its inventor, this engine design has not been as widely used as the piston-style engine found in most automobiles today, although the rotary did appear in the Mazda RX-7 and is reappearing in the concept cars of tomorrow.
		This truly tiny engine will have similar proportions as are used in the steel mini engine, but would use about one-thousandth of an ounce of fuel for two hours of operating time.
	www.berkeley.edu /news/media/releases/2001/04/02_engin.html (0 words)

	Rotary Engine (Site not responding. Last check: 2007-11-07)
		Figure 6 is an exploded view of the rotating and stationary members of the toroidal rotary engine of the present invention taken in the direction of the arrow labeled 6 in Figure 5.
		Figure 7 is a cross-sectional view of the toroidal rotary engine of the present invention taken along the line 7-7 of Figure 1, showing the connections of the upper external gear and internal output shaft.
		Figure 9 is a cross-sectional view of the toroidal rotary engine of the present invention taken along the line 9-9 of Figure 1 illustrating the lower external gear attached to the outer shaft and two pistons attached to the upper center rotating member.
	www.invention.net /barrera.htm (0 words)

	The Rotary Engine
		In all of the engines that I have mentioned, the cylinders all move in the same direction that are inline.
		Other engines, such as lawnmowers and boat engines, are two-stroke, and they basically have the intake and combustion in the first stroke, and exhaust in the second stroke.
		A basic rotary engine contains what are known as the rotor, which is a triangulated block, and the housing, which is in a special form known as a peritrochoid.
	www.allenhah.com /engine.htm (0 words)

	Mazda Powered Farvergnugen, Mazda into VW Engine Conversion
		The rotary engine is commonly found in all the Mazda's with the R designation, meaning R-100, Rx-2, Rx-3, Rx-4, and most commonly the Rx-7.
		The adapter plate bolts on to the engine and converts the Mazda bellhousing to a VW transaxle bolt pattern.
		Later on I discovered the engine was coming in and out (because of various transmission, clutch, and axle failures), I just trimmed the apron a little bit and now the engine comes out without taking out the starter stud, piece of cake.
	www.geocities.com /zenjoe/vw.html (0 words)

	Horizon Technology -- ROTARY HYDROGEN ENGINE (Site not responding. Last check: 2007-11-07)
		A clean-burning rotary hydrogen engine is being worked on by a group in New Zealand.
		What we propose with our rotary engine is to use this higher temperature of the hydrogen as a catalyst or trigger.
		This being the reverse of the present steam engine, where a large body of water is heated externally.
	www.eskimo.com /~ghawk/rotary.html (0 words)

	Rotary engine - Wikipedia, the free encyclopedia
		Lawrence Hargrave first developed a rotary engine in 1889 using compressed air, intending for it to be used in powered flight.
		The Gnôme Monosoupape series of engines is known to have this sort of switching available to it, and has been demonstrated long after WW I by a 160 hp Monosoupape powered reproduction Sopwith Camel at Old Rhinebeck Aerodrome while in flight in the 1990s.
		An external difference is that radial engine cylinders are usually finned for cooling, whereas rotary engine cylinders are often not finned, as the cooling is sufficient without the extra expense and complexity of construction.
	en.wikipedia.org /wiki/Rotary_engine (0 words)

	Rotary Stirling Rotary Overview
		Until now, ultra simple heat engine designs were generally devices that rocked or vibrated but did not rotate.
		Although this design has less points of friction than a conventional Stirling engine, it is slightly less efficient as it lacks dwell time and a regenerator, and chamber air turbulence is lower.
		It is not the first pseudo-rotary heat engine but it is the simplest.
	www.emachineshop.com /engine/index.htm (0 words)

	Wankel Rotary Engines - Theory and Design (Site not responding. Last check: 2007-11-07)
		The RCE Peripheral Housing [gloss] supercedes the piston engine's cylinder.
		The rotary combustion engine must not be confused with "rotary" aircraft engines which are piston cylinders arranged in a circle.
		Designs for rotary engines were proposed as early as 1588 by Ramelli, though it took the development of the Otto cycle engine in 1876 and the advent of the automobile in 1896 to set the stage for a proper rotary combustion engine.
	www.millville.org /workshops_f/kess_mech/Kess_Wankel/rce.html (0 words)

	Lbry.com - Rotary Engine Displacement Explained (Site not responding. Last check: 2007-11-07)
		Remember that I stated that the true displacement of the rotary engine, if figured out according to the way piston engine volumes are calculated, is according to the total number of rotor faces and not the number of rotors, nor does it have anything to do with rpm.
		Another aspect of the rotary's peripheral exhaust port configuration that contributes to less low end power and greater fuel consumption is its incredibly long duration or time it is open for.
		However since the rotary engine is a 6 stroke engine and not a 4 stroke engine since it takes 3 complete eccentric shaft revolutions to fire all faces instead of the typical engine's 2, it only does 66% the work of a 4 stroke 3.9 liter engine.
	www.lbry.com /articles/2447/1/Rotary-Engine-Displacement-Explained (0 words)

	Green Car Congress: Modified Rand Cam Rotary Engine Entering Series Hybrid Testing
		Reg Technologies announced that modifications on a 42hp (31kW) diesel version of the Rand Cam sliding-vane rotary engine have been completed and that testing is beginning on a genset application for a series hybrid vehicle as well as for an unmanned aerial application.
		The engine is compact (the 42hp diesel is 6" in diameter and 6" long), and offers 30% volume efficiency, according to the company, compared to the Wankel engine’s 10% volume efficiency.
		Also, Messerschmidt made diesel fighter plane engines with opposing pistons inside of a common cylinder, in which diesel was injected when the pistons were at their closest.
	www.greencarcongress.com /2005/11/modified_rand_c.html (774 words)

	Wankel rotary aircraft engine
		I for one was very skeptical at first - that was until I talked to a manufacturer who was flying on it, felt the engine on an airframe running with NO rubber motor mounts, and watched it fly, on a plane with one person on board.
		My observation and conclusion is that the engine does NOT have the power of a 912 - which it is being used by the factory to compare to.
		On several flights, in hot humid, conditions it appeared that both craft were flying very close to the power curve, and had the engines "burped or missed" the pilots would have been in serious trouble.
	www.ultralightnews.com /airventure99/wankel_rotary.htm (0 words)

	New Inventors: Rotary Piston Engine
		The Rotary Piston Engine is an engine which uses compressed air instead of petrol for its power source.
		Although yet to be tested, Angelo believes his engine may have greater application in powering stationary machines like industrial pumps in the petrochemical and mining industries where internal combustion engines can’t be used because of the risk of explosion.
		From his early experience with Wankel rotary engines, Angelo became interested in developing a more efficient engine than the traditional reciprocating internal combustion engine, and he has worked on various alternative concepts intermittently over the last 30 years.
	www.abc.net.au /newinventors/txt/s1072065.htm (0 words)

	How a Rotary Engine Works
		This gas engine is also referred to as a Wankel Motor because it was designed by a German engineer whose name was Felix Wankel.
		Currently the rotary engine is being produced only by Mazda, and the most commons cars that use them are the RX-8, and the RX-7.
		Although the concept of the rotary engine has always remained the same, the RX-8 motor, otherwise known as the RENESIS engine is dramatically different.
	www.rotaryengineillustrated.com /how-a-wankel-rotary-engine-works (113 words)

	Rotary Engine Technologies Wankel Rotary Engines, Aircraft Engines, Racing Kart Engines
		The four engine sizes (40 HP, 80 HP, 180 HP and 240 HP) are intended to be utilized in ultralight, homebuilt and experimental aircraft.
		Other usages include UAV’s for military applications, powered parachutes, autogyros, powered balloons, etc. The engines are not FAA certified for use in General Aviation Aircraft.
		Global Rotary Power Inc. is pleased to announce that the warranty period on GR-CC400A series and GR-OC650A series engines is 200 hrs.
	www.rotaryengines.ca /main/aircraft.htm (0 words)

	Rotaary Steam Engine
		In 1763 James Watt was sent a Newcomen steam engine to repair.
		Watt worked on the idea for several months and eventually produced a steam engine that cooled the used steam in a condenser separate from the main cylinder.
		Richard Arkwright was quick to importance of this new invention, and in 1783 he began using Watt's steam-engine in his textile mill.
	www.spartacus.schoolnet.co.uk /TEXrotary.htm (0 words)

	EETimes.com - Rotary engine revs for comeback
		The fundamental difference between the rotary design and standard reciprocating piston engines is that the intake-compression-ignition-exhaust sequence is completed in one revolution rather than two.
		Its downfall, according to Robertson, was that the engine was insufficiently sealed to prevent fluids from leaking and to control emissions.
		Unlike a reciprocating piston-driven engine, Robertson said, the Radmax design provides "constant combustion." He likened the engine's performance to riding a bike downhill, whereas a piston engine's operation is analogous to pedaling uphill.
	www.eetimes.com /news/latest/showArticle.jhtml?articleID=196700204 (919 words)

	Rotary Aircraft Revolution (Site not responding. Last check: 2007-11-07)
		Free rotary engine design, not Wankel, basic Idea, 3D animation, the future GA aviation power.
		A roster of those who are putting, or flying, rotary engines in aircraft.
		Rotary engines have many advantages over pistion engines especially in light aircraft.
	c.webring.com /hub?ring=rotaryenginesina (0 words)

	Rotary Engine Tech
		This is a major problem area on high output 13BT engines, as they tend to crack at high power levels and is the main reason that the 13BT blocks are not reliable beyond 400HP.
		The water pump housing assembly on all the rotary engines are interchangable, but the appropriate front cover/pulleys/etc...
		The engine mounts locations of the 13B-REW are under the rear side housing, while the mounts on the 13BT are located on the intermediate housing.
	www.fd3s.net /engine_tech.html (0 words)

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