MR layout - Revision history

Red marquis at 13:16, 4 April 2009

2009-04-04T13:16:42Z

← Older revision		Revision as of 13:16, 4 April 2009
Line 1:		Line 1:
	In [[automobile]] design, an '''MR''' or '''mid-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency ~~tow,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,ard~~ being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.		In [[automobile]] design, an '''MR''' or '''mid-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency toward being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.

	In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)\|Formula]] racing cars (such as [[Formula 1\|F1s]]).		In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)\|Formula]] racing cars (such as [[Formula 1\|F1s]]).

99.7.77.243 at 12:20, 4 April 2009

2009-04-04T12:20:00Z

← Older revision		Revision as of 12:20, 4 April 2009
Line 1:		Line 1:
	In [[automobile]] design, an '''MR''' or '''mid-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency ~~toward~~ being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.		In [[automobile]] design, an '''MR''' or '''mid-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency tow,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,ard being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.

	In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)\|Formula]] racing cars (such as [[Formula 1\|F1s]]).		In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)\|Formula]] racing cars (such as [[Formula 1\|F1s]]).

81.106.229.118 at 11:03, 18 September 2007

2007-09-18T11:03:31Z

← Older revision		Revision as of 11:03, 18 September 2007
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	In [[automobile]] design, an '''MR''' or '''~~Pruitts faggot~~-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency toward being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.		In [[automobile]] design, an '''MR''' or '''mid-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency toward being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.

	~~We know that James is always wrong. The Idiiot.~~ In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)\|Formula]] racing cars (such as [[Formula 1\|F1s]]).		In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)\|Formula]] racing cars (such as [[Formula 1\|F1s]]).

	This configuration was also common in very small engined 1950s microcars, in which the engines didn't take up much space.		This configuration was also common in very small engined 1950s microcars, in which the engines didn't take up much space.

128.194.72.250 at 05:07, 8 April 2007

2007-04-08T05:07:20Z

← Older revision		Revision as of 05:07, 8 April 2007
Line 1:		Line 1:
	In [[automobile]] design, an '''MR''' or '''Pruitts faggot-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency toward being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.		In [[automobile]] design, an '''MR''' or '''Pruitts faggot-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency toward being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.

	In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)\|Formula]] racing cars (such as [[Formula 1\|F1s]]).		We know that James is always wrong. The Idiiot. In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)\|Formula]] racing cars (such as [[Formula 1\|F1s]]).

	This configuration was also common in very small engined 1950s microcars, in which the engines didn't take up much space.		This configuration was also common in very small engined 1950s microcars, in which the engines didn't take up much space.

128.194.72.250 at 05:06, 8 April 2007

2007-04-08T05:06:22Z

← Older revision		Revision as of 05:06, 8 April 2007
Line 1:		Line 1:
	In [[automobile]] design, an '''MR''' or '''~~Rear~~-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency toward being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.		In [[automobile]] design, an '''MR''' or '''Pruitts faggot-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency toward being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.

	In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)\|Formula]] racing cars (such as [[Formula 1\|F1s]]).		In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)\|Formula]] racing cars (such as [[Formula 1\|F1s]]).

128.194.72.250 at 05:05, 8 April 2007

2007-04-08T05:05:47Z

← Older revision		Revision as of 05:05, 8 April 2007
Line 1:		Line 1:
	In [[automobile]] design, an '''MR''' or '''~~mid~~-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency toward being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.		In [[automobile]] design, an '''MR''' or '''Rear-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency toward being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.

	In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)\|Formula]] racing cars (such as [[Formula 1\|F1s]]).		In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)\|Formula]] racing cars (such as [[Formula 1\|F1s]]).

Carguy at 19:23, 27 June 2006

2006-06-27T19:23:38Z

New page

In [[automobile]] design, an '''MR''' or '''mid-engine, [[Rear wheel drive]] layout''' is one in which the rear wheels are driven by an engine placed just in front of them, behind the passenger compartment. In contrast to the rear-engined [[RR layout]], the center of gravity of the [[engine]] is in front of the rear axle. This layout is typically chosen for its low polar inertia and relatively favorable weight distribution (the heaviest component is near the center of the car, making the main component of its moment of inertia relatively low). The layout does suffer from a tendency toward being heavier in the rear than the front, which is not ideal for handling. However, it is generally felt that the lower polar inertia more than makes up for this. The mid-engined layout also uses up central space, making it impractical for any but two-seater sports cars.

In modern racing cars, MR is the usual configuration and is usually synonymous with "rear engine". Due to its favorable weight dynamics, this layout is heavily employed in [[formula (car)|Formula]] racing cars (such as [[Formula 1|F1s]]).

This configuration was also common in very small engined 1950s microcars, in which the engines didn't take up much space.

Because of successes in racing, the MR platform has been popular for road going sports cars despite the inherent challenges of design, maintenance and lack of cargo space. The 1923 Benz Tropfenwagen was the first race car with mid-engine, rear-wheel drive layout. It was based on an earlier design named Rumpler Tropfenwagen in 1921 made by Edmund von Rumpler, an Austrian engineer working at Daimler. The Benz tropfenwagen was designed by Ferdinand Porsche along with Willy Walb and Hans Nibel. It raced in 1923 and 1924 and was most successful in Italian [[Grand Prix]] in Monza where it stood fourth. Later, Ferdinand Porsche used mid-engine design concept towards the Auto Union [[Grand Prix motor racing|Grand Prix]] cars of the 1930's which became the first winning MR racers. They were decades before their time, although MR Miller Specials raced a few times at [[Indianapolis 500|Indianapolis]] between 1939 and 1947. In 1953 [[Porsche]] premiered the tiny and altogether new MR [[Porsche 550|550 spyder]] and in a year it was notoriously winning in the smaller sports and endurance race car classes against much larger cars- a sign of greater things to come. The [[Porsche 718|718]] followed similarly in 1958. But it was not until the 1960's that [[History of Formula One#The_mid_engine_revolution|MR reappeared in Grand Prix]] (todays '[[Formula 1]]') races in the form of the [[Cooper Car Company|Cooper]] - [[Coventry-Climax|Climax]] (1959), coinciding or soon followed by cars from [[BRM]] and [[Lotus Cars|Lotus]]. [[Ferrari]] and [[Porsche]] soon made Gran Prix MR attempts with less initial success. [[Dan Gurney]] brought MR back to [[Indianapolis 500|Indianapolis]] in 1963 via [[Lotus Cars|Lotus]] and in a year it was the clear trend, becoming the first mid-engined design to win there in 1965. In 1964 [[Jim Hall (race car driver)|Jim Hall]] created his MR [[Chaparral (car)|Chaparrals]], pushing certain innovations which have never been duplicated, and over the next several years were probably the fastest road racing cars of any type. The Chaparrals continued in the fantastic, unrestricted [[Can-Am]] series from 1966-1974 where all cars were MR. [[Ford Motor Company|Ford]], all but ignoring Can-Am racing in its own country, took advantage of somewhat uncompetitive [[24 Hours of Le Mans|Le Mans]] racing to introduce the MR [[GT40]] which not only won, but more importantly dominated Ferrari at [[24 Hours of Le Mans|Le Mans]] from 1966-1969. In turn, by 1973 [[24 Hours of Le Mans|Le Mans]] and [[Can-Am]] were both so dominated by Porsche's [[Porsche 917|blistering MR 917's]] (leading ultimately to the [[Porsche 936|936]] and [[Porsche 956|956/962]]), the fate of [[World Sportscar Championship|Sports Prototypes]] as MR was sealed and Ferrari lost interest in Le Mans until the 1980's. The skyrocketing speeds and power of the [[Porsche 917|917]] era necessitated restrictions which permanently ended unlimited road racing.

[[Porsche 550]] Spyder (1954) was the first ever production road car with MR layout. A total of 125 including 90 road versions were produced. Examples of other early road cars using the MR layout included , [[Zündapp Janus]] (1957), [[De Tomaso Vallelunga]] (1965), [[Lotus Europa]] (1966) 9300 produced, [[Lamborghini Miura]] (1966) 987 produced, [[Ford GT40]] (1966), Ferrari [[Dino (car)|Ferrari Dino 206/246]] (1968), [[Porsche 914]] (1969) 118,000 produced, and [[De Tomaso Pantera]] (1971). Its space-inefficiency means that it is mainly used in [[sports car]]s, for example the [[Porsche Boxster]] and [[Porsche Cayman|Cayman]], [[Toyota MR2]], [[Pontiac Fiero]], [[Honda NSX]], [[Lotus Elise]], [[MG_F|MGF]], and [[supercar]]s such as the [[Pagani Zonda]], recent [[Porsche Carrera GT|Porsche Carrera]]s, [[Enzo Ferrari|Ferrari Enzo]], [[Lamborghini|Lamborghinis]], [[McLaren F1]], [[Ford GT]], etc. See the [[List of MR Cars]] for a complete list. The [[Zündapp Janus]] is perhaps unique, in that it is literally mid-engined and nearly symmetrical with passengers on both ends of the engine.

==References==
* [http://wspr-racing.com/wspr/results/canam/nf_canam_home.html wspr-racing.com/wspr/results/canam/nf_canam_home.html]
* [http://www.indycar.com/multimedia/photos/galleries.php www.indycar.com/multimedia/photos/galleries.php]
* [http://www.ddavid.com/formula1/rcg.htm www.ddavid.com/formula1/rcg.htm]
* [http://www.chaparralcars.com www.chaparralcars.com]
* [http://www.racingsportscars.com/photo_lemans.html www.racingsportscars.com/photo_lemans.html]
* Porsche Spyder MR detail [http://www.spyderclub.com/articles/spyder_history/spyder_history.htm www.spyderclub.com/articles/spyder_history/spyder_history.htm]

==See also==
* [[Front wheel drive]]
* [[All wheel drive]]
* [[Rear wheel drive]]
* [[RR layout]]
* [[FR layout]]
* [[FF layout]]
* [[FM layout]]
* [[MF layout]]
* [[List of MR Cars]]
* [[Mid-engine design]]

[[Category:Automobile layouts]]