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Topic: Rotary piston engine

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	Rotary engine - Wikipedia, the free encyclopedia
		The rotary engine was a common type of internal combustion aircraft engine in the early years of the 20th century.
		Most rotary engines were arranged with the cylinders pointed outwards from a single crankshaft, in the same general form as a radial, but there were also rotary boxer engines and even one cylinder rotaries.
		Another motorcycle with a radial rotary engine was the Redrup Radial, which had a rotating 3 cylinder engine in its frame.
	en.wikipedia.org /wiki/Rotary_engine (1257 words)

	Reciprocating engine - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-11-06)
		The reciprocating engine was introduced with the now obsolete steam engine, but today the most common form of reciprocating engines is the internal combustion engine using the burning of gasoline, diesel fuel, oil or natural gas or to provide pressure.
		The linear movement of the piston is converted to a circular movement via a connecting rod and a crankshaft.
		In most applications of steam power, the piston engine has been replaced by the more efficient turbine instead, with pistons being used in cars owing to their requirement for a high level of torque.
	www.hartselle.us /project/wikipedia/index.php/Piston_engine (377 words)

	Encyclopedia: Rotary piston engine
		Vibration had been such a serious problem on other piston engine designs that a separate piece of metal had to be added as a flywheel, so the rotaries had a somewhat better power-to-weight ratio than other designs.
		Diagram of the opposing pistons in a boxer engine A flat engine or boxer engine or horizontally opposed engine is a type of engine where the pistons lie horizontally opposed, with pairs of cylinders on the left and the right, as opposed to most modern engines where all pistons are...
		Inline engines were able to increase power through increased RPM, another trick the rotary couldn't match due to increased wind resistance on the cylinder heads as they rotated, an increase of 36% from a then-normal 1200 to 1400 rpm, energy that was not being put into the propeller.
	www.nationmaster.com /encyclopedia/Rotary-piston-engine (2449 words)

	Rotary Engine (Site not responding. Last check: 2007-11-06)
		In a rotary engine, the pressure of combustion is contained in a chamber formed by part of the housing and sealed in by one face of the triangular rotor, which is what the engine uses instead of pistons.
		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.
	succ.shirazu.ac.ir /~motor/engin/rotr.htm (1903 words)

	Rotary piston engine -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-06)
		The rotary engine was a common type of (The combustion of fuel inside a cylinder (as in an internal-combustion engine)) internal combustion (The engine that powers and aircraft) aircraft engine in the early years of the (Click link for more info and facts about 20th century) 20th century.
		Most rotary engines were arranged with the cylinders pointed outwards from a single crankshaft, in the same general form as a (Pneumatic tire that has radial-ply casing) radial, but there were also rotary (Click link for more info and facts about boxer engine) boxer engines and even one cylinder rotaries.
		Inline engines were able to increase power through increased RPM, another trick the rotary couldn't match due to increased wind resistance on the cylinder heads as they rotated, an increase of 36% from a then-normal 1200 RPM to 1400 RPM, energy that was not being put into the propeller.
	www.absoluteastronomy.com /encyclopedia/r/ro/rotary_piston_engine.htm (1568 words)

	WANKEL ENGINE FACTS AND INFORMATION (Site not responding. Last check: 2007-11-06)
		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.
		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.
		In 2003, Mazda re-launched the rotary with the new RX-8.
	www.witwik.com /Wankel_engine (2323 words)

	A better rotary engine
		Wittry's design is based on a form of rotary engine known as the "scissors-action" internal combustion 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.
	www.usc.edu /uscnews/stories/1299.html (603 words)

	AllRefer.com - rotary engine (Technology: Terms And Concepts) - Encyclopedia (Site not responding. Last check: 2007-11-06)
		rotary engine, internal-combustion engine whose cycle is similar to that of a piston engine, but which produces rotary motion directly without any conversion from reciprocating motion.
		The only type of rotary engine currently considered to be of practical value is the Wankel engine (see internal-combustion engine).
		Although the gas turbine produces rotary motion directly, it is not generally considered a rotary engine because it functions differently.
	reference.allrefer.com /encyclopedia/R/rotaryen.html (196 words)

	Wankel Rotary Engines - Theory and Design (Site not responding. Last check: 2007-11-06)
		The rotary combustion engine must not be confused with "rotary" aircraft engines which are piston cylinders arranged in a circle.
		Engines are closely related to pumps and compressors: the former drives and the latter is driven.
		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.monito.com /wankel/rce.html (685 words)

	History of the Rotary Engine
		Rotary piston engines do not employ a crankshaft; the linear piston is replaced by a rotary piston coupled to a rotating shaft which performs an uniform or variable rotary movement without being affected by alternating inertial forces due to changes in piston velocity, particularly at top dead centre and bottom dead centre.
		Even in the 17th century, engineers were trying to solve the problem of “leak-proofing” between moving parts and this problem continues to be the Achilles heel of the rotary piston engine although Mazda would seem to have reduced this problem to manageable proportions.
		Sensaud and Lavaud, (the French engineers responsible for the Traction Avant automatic gearbox which was a failure) applied for a patent for a rotary piston engine with internally meshing gears in a hypocycloid housing and a 5:6 reduction ratio.
	www.deadbeatdad.org /eliptoid/history.html (595 words)

	Rotary engine (Site not responding. Last check: 2007-11-06)
		Ironically, the rotary engine was poised to replace the piston engine in the mid-'70s because it had bettter...
		This is due to the characteristic rotary engine power curve, and it means maximum performance launches from a dead stop require the driver to dump the...
		A rotary engine has a fixed crankshaft that is rigidly mounted to the fuselage of the...
	www.basketballgaming.com /rotary+engine.html (920 words)

	RX8Club.com - Repair Cost vs. Piston (Site not responding. Last check: 2007-11-06)
		When the engine blows, it's usually because of a seal (apex seal, side seal, oil seals, etc) This is somewhat the equivalent of a piston engine blowing a head gasket or ring seal or valve spring or timing belt.
		It's less expensive to repair a blown piston engine because you don't need to remove the entire motor to fix those types of broken seals - on a rotary the engine must be removed and the engine internals must be dismantled.
		In addition, rotary mechanics aren't as abundant as general mechanics who can troubleshoot and repair most piston engines; therefore a good rotary mechanic might not have as much competition for business.
	www.rx8club.com /showthread.php?t=22009 (1431 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 (1152 words)

	Rotary piston engine - Wikipedia, the free encyclopedia
		For the piston engine that rotates in operation, as used on World War I fighter aircraft, see rotary engine.
		For the engines which use rotors or rotary pistons instead of conventional reciprocating pistons, see pistonless rotary engine.
		This is a disambiguation page, a list of pages that otherwise might share the same title.
	en.wikipedia.org /wiki/Rotary_piston_engine (121 words)

	Rotor housing for a rotary piston engine having softened areas surrounding the plug holes - Patent 4755116
		A rotor housing for a rotary piston engine having improved gas sealing property between the inner surface and apex seals mounted on a rotor.
		A rotary piston engine typically has a triangular rotor with convex sides which rotates in a rotor housing whose internal cross-section presents an oval shape slightly constricted in the middle (epitrochoid).
		It is, however, impossible for the rotary housing with the inner surface wall formed of a hard plating such as a chrome plating to avoid sufficiently the drop in compression pressure in the chambers which is caused both during normal driving condition and in a high-power engine which gives off large amounts of heat.
	www.freepatentsonline.com /4755116.html (3550 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 (615 words)

	The Wankel Engine History
		His first patent for a rotary piston engine was granted in 1936.
		Intake and exhaust are by ports on the housing, similar in principle to a two-stroke piston engine.
		It was followed in 1968 by the NSU R080, a four-door sedan with a twin-rotor engine that was essentially a doubled version of the Spider engine.
	www.theautochannel.com /news/2004/07/04/202357.html (1201 words)

	RX-7 Owners Club - Test your engine knowledge - Rotary vs Piston Comparison (Site not responding. Last check: 2007-11-06)
		Most people that think the rotary engine is to complicated simply aren't smart enough to understand it or don't want to understand it.
		This is why rotaries have poor BSFC, and lower HP/l (given the same torque curve) for a similarly sized piston engine.
		Since rotary engines are compartively smaller than a piston engine producing similar power, it allows for better weight distribution.
	www.rx7club.com /showthread.php?t=79943 (1353 words)

	Rotary Engines, Felix Wankel, NSU Ro80, Mazda RX-8
		Over the next decade and a half and during WW2, Wankel was involved in the development of a rotary disc type valve for use in aircraft and torpedo engines, thereby shelving the rotary engine project, and he held jobs at BMW, DVL, Daimler-Benz, Lilienthal and Junker Aircraft.
		Well, see here, it's like this dude: The heart of a rotary engine is the rotor, which is a trochoid (roughly triangular) shaped component whose convex faces each act as pistons.
		By doing away with the reciprocating motion of a reciprocating engine, a rotary unit is also much smoother and can spin much faster, however the lack of torque at low speeds partially offsets this advantage by leading to greater fuel consumption.
	www.fantasycars.com /sedans/column/sedans16_rotary.html (1466 words)

	Encyclopedia article on Rotary piston engine [EncycloZine] (Site not responding. Last check: 2007-11-06)
		Vibration was such a serious problem on early engines that a flywheel would otherwise have to be added as a separate block of metal, so the rotaries had a somewhat better power-to-weight ratio than other designs.
		Of course with no throttle, the engine was either on or off, so something as simple as reducing power for landing required the pilot to cut the ignition, "blipping" the engine on and off.
		It is said that the rotary powered Sopwith Camel could execute a turn to the right at double the rate to the left, by manuvering the plane around the massive gyroscopic momentum of the engine.
	encyclozine.com /Rotary_piston_engine (1388 words)

	Rotary Performance Technical Articles
		We all know that these engines are measured by measuring the area of the bore, multiply by the stroke and then multiply by the number of cylinders.
		The key for comparing the displacement between the 4-cycle engine and the rotary engine is in studying the degrees of rotation for a thermodynamic cycle to occur.
		For a 4-cycle engine to complete every thermodynamic cycle, the engine must rotate 720° or two complete revolutions of the crankshaft.
	www.rx7.com /techarticles_displacement.html (415 words)

	Wankel rotary engine (from gasoline engine) -- Encyclopædia Britannica
		A rotary-piston internal-combustion engine developed in Germany is radically different in structure from conventional reciprocating piston engines.
		The engine was conceived by Felix Wankel, a specialist in the design of sealing devices, and experimental units were built and tested by a German firm beginning in 1956.
		internal-combustion engine in which the combustion chambers and cylinders rotate with the driven shaft around a fixed control shaft to which pistons are affixed; the gas pressures of combustion are used to rotate the shaft.
	www.britannica.com /eb/article-47218?tocId=47218 (743 words)

	index
		The engine would have never have started and ran in February of 1957 if this error was not made.
		This engine is designed to run backwards and forewards at the same time the wide side seals and small eccentricity saved the engine from destroying itself.
		This is the system required to machine the engine and the diameter of the cutter or grinding stone cannot be larger than the diameter of the eccentricity.
	www.starapex.com (596 words)

	Wankel or Wolfhart engine?
		The main parts of this engine are two rotors, one within the other, interlocked and angled to each other, an internal piston rotor 1 and an outside cylinder rotor 2.
		This engine has the kinematics of a genuine rotary piston machine, as it was once defined by Felix Wankel, because there are no oscillating mass forces.
		I invented this engine as competition to the emerging Wankel engine in the sixties.
	neptune.spaceports.com /~wolfhart/motorus.htm (1167 words)

	Technologies In Stock: VESELOVSKY Rotary-Piston Engine
		It is generally recognized that Wankel-type rotary engines possess a number of essential drawbacks that hinder considerably its practical applications.
		The Veselovsky engine is the type of rotary-piston internal combustion engine with the planetary movement of the rotor-piston.
		On the contrary the gas-exchange windows of th e Veselovsky engine are located at the periphery of the elliptical rotary-piston and follow ("track") the zones of pressure changes.
	www.machaon.ru /tetra/veselo.htm (633 words)

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