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Which Is The Best Engine Placement: Front-Engine, Mid-Engine, Or Rear-Engine?
Which Is The Best Engine Placement: Front-Engine, Mid-Engine, Or Rear-Engine?
Published: 2017/10/04
Channel: Sirpalmtree
Mid Engine Cars - RWD vs AWD
Mid Engine Cars - RWD vs AWD
Published: 2015/01/07
Channel: Engineering Explained
Mid Engine Design
Mid Engine Design
Published: 2015/10/27
Channel: Wiki Automobiles
9 Mid-Engine Cars Which Are Not Supercars
9 Mid-Engine Cars Which Are Not Supercars
Published: 2016/05/19
Channel: VisioRacer
Mid-Engine Design: Geneva Motorshow 2011
Mid-Engine Design: Geneva Motorshow 2011
Published: 2011/03/10
Channel: Porsche
LS Mid engine swap
LS Mid engine swap
Published: 2017/04/03
Channel: usmcbutler
Mid engine Cavalier first drive
Mid engine Cavalier first drive
Published: 2014/05/07
Channel: midenginecav
DF Goblin - Build your own mid-engine sports car
DF Goblin - Build your own mid-engine sports car
Published: 2015/01/27
Channel: DF Kit Car
mid engine ford mustang fastback
mid engine ford mustang fastback
Published: 2016/12/24
Channel: car addiction
accent mid engine 3
accent mid engine 3
Published: 2010/05/14
Channel: DSPWest
Rear Engine Cars - RWD vs AWD
Rear Engine Cars - RWD vs AWD
Published: 2015/01/14
Channel: Engineering Explained
VW Rabbit GSXR 1000 Mid Engine
VW Rabbit GSXR 1000 Mid Engine
Published: 2016/12/25
Channel: Gabriel Kuykendall
Mid Engine Design with Aventador and MR2
Mid Engine Design with Aventador and MR2
Published: 2015/10/27
Channel: Wiki Automobiles
C8 MID ENGINE CORVETTE IS HERE! (Everything You NEED To Know)
C8 MID ENGINE CORVETTE IS HERE! (Everything You NEED To Know)
Published: 2017/02/01
Channel: Street Speed 717
The Spin Cycle... or how easy it is to spin a mid-engine car on cold tires
The Spin Cycle... or how easy it is to spin a mid-engine car on cold tires
Published: 2011/08/15
Channel: Bill Strong
Mid Engine 1700 HP Chevy LSX.  For Mid Engine Cars.  Nelson Racing Engines.  GM LSX.  Mirror Turbos.
Mid Engine 1700 HP Chevy LSX. For Mid Engine Cars. Nelson Racing Engines. GM LSX. Mirror Turbos.
Published: 2013/04/12
Channel: BIGJACKTURBO
Factory Five Racing 818: Mid-Engine Marvel
Factory Five Racing 818: Mid-Engine Marvel
Published: 2015/08/16
Channel: ElectricFederal
7 Rear-Engine RWD Cars That Are Not a Porsche 911 | Ep. 1
7 Rear-Engine RWD Cars That Are Not a Porsche 911 | Ep. 1
Published: 2016/04/07
Channel: VisioRacer
THESE cars are MID-ENGINE too?!
THESE cars are MID-ENGINE too?!
Published: 2016/08/04
Channel: Downforce City
Mid engine teg
Mid engine teg
Published: 2018/02/07
Channel: j w
Mid engine RWD Honda Civic hatch conversion.MOV
Mid engine RWD Honda Civic hatch conversion.MOV
Published: 2012/04/22
Channel: J Noble
Mazda 323 Mid Engine Conversion
Mazda 323 Mid Engine Conversion
Published: 2016/08/21
Channel: Nic Bolton Just Another Bushman
850 HP Mid Engine Corvette Twin Turbo!!! & Lamborghini Uris!!!
850 HP Mid Engine Corvette Twin Turbo!!! & Lamborghini Uris!!!
Published: 2017/12/19
Channel: Carpidity
Mid engine RWD conversion b20 turbo Honda CRX build, drag racing
Mid engine RWD conversion b20 turbo Honda CRX build, drag racing
Published: 2009/09/11
Channel: zimsplat
mid engine mustang
mid engine mustang
Published: 2013/11/19
Channel: Jacque Langston
2019 Mid-Engine Corvette C8: OUT IN PUBLIC (New Photos & What We Know)
2019 Mid-Engine Corvette C8: OUT IN PUBLIC (New Photos & What We Know)
Published: 2017/10/12
Channel: NEO auto
Mazda 323 Mid Engine Project Part 2
Mazda 323 Mid Engine Project Part 2
Published: 2016/08/31
Channel: Nic Bolton Just Another Bushman
Project Nemesis a mid engine Locost
Project Nemesis a mid engine Locost
Published: 2012/12/10
Channel: evo626
Hyundai may be working on Theta III power for a mid-engine car by BuzzStyle
Hyundai may be working on Theta III power for a mid-engine car by BuzzStyle
Published: 2018/02/13
Channel: BuzzStyle
Mid-engine balanced design
Mid-engine balanced design
Published: 2013/01/21
Channel: Corneringmiddies
Car New | Leaked CAD photos claim to show mid-engine Corvette
Car New | Leaked CAD photos claim to show mid-engine Corvette
Published: 2018/01/29
Channel: Car New
Mid engine poetry
Mid engine poetry
Published: 2011/08/11
Channel: sumflow
Mid Engine Corvette Spied Road Testing | What We Know
Mid Engine Corvette Spied Road Testing | What We Know
Published: 2017/10/23
Channel: Just A Car Guy Named Tom
Car New | Chevy may soon unveil mid-engine Corvette
Car New | Chevy may soon unveil mid-engine Corvette
Published: 2017/12/07
Channel: Car New
Car New | Uncovered Corvette Engine All But Confirms GM
Car New | Uncovered Corvette Engine All But Confirms GM's Mid-Engine Supercar
Published: 2016/12/26
Channel: Car New
Mid Engine Performance- On A Budget? YES! MR2 TURBO!
Mid Engine Performance- On A Budget? YES! MR2 TURBO!
Published: 2018/01/17
Channel: Grenade Motorsports
Shift linkage, Subaru 5 speed for mid engine application
Shift linkage, Subaru 5 speed for mid engine application
Published: 2011/06/19
Channel: Erik Gerrits
Car New | C8 Mid Engine Corvette Details
Car New | C8 Mid Engine Corvette Details
Published: 2017/09/28
Channel: Car New
Mid engine sand truck
Mid engine sand truck
Published: 2010/01/02
Channel: tjinreno
Mid engine el camino.3gp
Mid engine el camino.3gp
Published: 2012/07/30
Channel: edssuperspeed
Car New | A Mid-Engine C8 Corvette Is Coming!
Car New | A Mid-Engine C8 Corvette Is Coming!
Published: 2017/10/06
Channel: Car New
Mike Ragonese Deserter GS 270hp Mid-Engine Street Buggy before body installed.
Mike Ragonese Deserter GS 270hp Mid-Engine Street Buggy before body installed.
Published: 2007/01/02
Channel: mragonese
V8 Corvair 427 mid engine autocross
V8 Corvair 427 mid engine autocross
Published: 2017/08/09
Channel: Claudia Black
2019 chevrolet corvette: mid-engine supercar spied
2019 chevrolet corvette: mid-engine supercar spied
Published: 2017/08/03
Channel: doris crook
Car New | Automobile Magazine Renders the C8 Zora ZR1 Mid-Engine Corvette
Car New | Automobile Magazine Renders the C8 Zora ZR1 Mid-Engine Corvette
Published: 2017/09/29
Channel: Car New
Mazda 323 mid engine conversion Part 4
Mazda 323 mid engine conversion Part 4
Published: 2016/10/19
Channel: Nic Bolton Just Another Bushman
Aria Group Mid Engine Corvette concept
Aria Group Mid Engine Corvette concept
Published: 2016/11/24
Channel: auto imagen
Corvette C8 Mid Engine is False    Hear me out!
Corvette C8 Mid Engine is False Hear me out!
Published: 2017/11/22
Channel: Gregory Salvatore
Mid engine Fiesta
Mid engine Fiesta
Published: 2009/03/25
Channel: Madis Hanni
Arashi - Mid Engine Concept
Arashi - Mid Engine Concept
Published: 2015/02/06
Channel: VigorousZX
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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A mid-engine layout describes the placement of an automobile engine between the rear and front axles

History[edit]

The mid-engine, rear-wheel drive format can be considered the original layout of automobiles. A 1901 Autocar was the first gasoline-powered automobile to use a drive shaft and placed the engine under the seat. This pioneering vehicle is now in the collection of the Smithsonian Institution.[1]

Benefits[edit]

The Lotus Europa S1 was based on a prototype built to compete for Henry Ford II's contract to build a Le Mans race car in the early 1960s.

Mounting the engine in the middle instead of the front of the vehicle puts more weight over the rear tires, so they have more traction and provide more assistance to the front tires in braking the vehicle, with less chance of rear-wheel lockup and less chance of a skid or spin out. If the mid-engine vehicle is also rear-drive the added weight on the rear tires can also improve acceleration on slippery surfaces, providing much of the benefit of all wheel drive without the added weight and expense of all wheel drive components. The mid-engine layout makes ABS brakes and traction control systems work better, by providing them more traction to control. The mid-engine layout may make a vehicle safer, since an accident can occur if a vehicle cannot stay in its own lane around a curve or is unable to stop quickly enough. Mid-engine design is also a way to provide additional empty crush space in the front of the automobile between the bumper and the windshield, which can then be used in a frontal collision to absorb more of the impact force to minimize penetration into the passenger compartment of the vehicle.

In most automobiles, and in sports cars especially, ideal car handling requires balanced traction between the front and rear wheels when cornering, in order to maximize the possible speed around curves without sliding out. This balance is harder to achieve when the heavy weight of the engine is located far to the front or far to the rear of the vehicle. Some automobile designs strive to balance the fore and aft weight distribution by other means, such as putting the engine in the front and the transmission and battery in the rear of the vehicle.

Another benefit comes when the heavy mass of the engine is located close to the back of the seats. It makes it easier for the suspension to absorb the force of bumps so the riders feel a smoother ride. But in sports cars the engine position is once again used to increase performance and the potentially smoother ride is usually more than offset by stiffer shock absorbers.

This layout also allows the transmission and motor to be directly bolted to each other—with independent suspension on the driven wheels; this removes the need for the chassis to transfer engine torque reaction.

Drawbacks[edit]

Underfloor mid-engine in a historical Hanomag truck chassis.

The largest drawback of mid-engine cars is restricted rear passenger space; consequently most mid-engine vehicles are two-seat vehicles. The engine in effect pushes the passenger compartment forward towards the front axle (if engine is behind driver). Exceptions typically involve larger vehicles of unusual length or height in which the passengers can share space between the axles with the engine, which can be between them or below them, as in some Toyota vans, large trucks and buses. The mid-engine layout (with a horizontal engine) was common in single-decker buses in the 1950s and 1960s, e.g. the AEC Reliance. The Ferrari Mondial is to date the only successful example of a true mid-engined convertible with seating for 4 and sports car / supercar performance. A version of the Lotus Evora with a removable roof panel is anticipated but no definite date is known.

Like any layout where the engine is not front-mounted and facing the wind, the traditional "engine-behind-the-passengers" layout makes engine cooling more difficult. This has been a problem in some cars,[citation needed] but this issue seems to have been largely solved in newer designs. For example, the Saleen S7 employs large engine-compartment vents on the sides and rear of the bodywork to help dissipate heat from its very high-output engine.

Mid engined cars are more dangerous than front-engined cars if the driver loses control - although this may be initially harder to provoke due to the superior balance - and the car begins to spin. The moment of inertia about the center of gravity is low due to the concentration of mass between the axles (similar to standing in the middle of a playground roundabout, rather than at the edge) and the spin will occur suddenly, the car will rotate faster and it will be harder to recover from. Conversely, a front-engined car is more likely to break away in a progressive and controllable manner as the tires lose traction.

Variations[edit]

The term "mid-engine" has usually been applied to cars having the engine located between the driver and the rear drive axles. This layout is referred to here as RMR layout. Super, sport and race cars typically have this mid-engine layout, as these vehicles' handling characteristics are more important than other features, such as capacity. Additionally the mechanical layout and packaging of an RMR car is substantially different from that of a front engine or rear engine car.

A subset of Front-Rear when the engine is in front of the driver, but fully behind the front axle line, the layout is sometimes called Front Mid engine Rear FMR layout instead of the less-specific term front-engine. In handling and vehicle layout FMR is substantially the same as FR.[citation needed] Some vehicles could be classified as FR or FMR depending on the factory installed engine (I4 vs I6). Historically most classical FR cars such as the Ford Models T and A would qualify as a FMR engine car. Additionally, the difference between FR and FMR may be as little as a few millimeters of engine protrusion in front of the front axle line as manufacturers mount engine as far back in the chassis as possible. Not all manufacturers use the Front-Mid designation.

Examples[edit]

FMR layout – Front Mid-engine / Rear-wheel drive[edit]

Front mid-engine position / Rear-wheel drive

These cars are RWD cars with engine placed between driver and front axle.

FM4 layout – Front Mid-engine / Four-wheel drive[edit]

This layout, similar to above FMR layout, with engine between driver and behind front axle, adds front wheel drive to become a four-wheel drive. An engineering challenge with this layout is getting the power to the front wheels past the engine - this would normally involve raising the engine to allow a propshaft to pass under the engine, or in the case of the Ferrari FF taking power from both ends of the crankshaft with two separate gearboxes.

RMR layout – Rear Mid-engine / Rear-wheel drive[edit]

Rear mid-engine position / Rear-wheel drive

These cars use traditional engine layout between driver and rear drive axle. Typically, they're simply called MR layout cars.

M4 layout – Rear Mid-engine / Four-wheel drive[edit]

These cars uses mid-ship, four-wheel drive, with engine between axles.

MF layout – Mid-engine / Front-wheel drive[edit]

Front mid-engine position / Front-wheel drive

These cars are "mid-ship engined" vehicles, but they use front-wheel drive, with the engine in front of the driver. It is still treated as an FF layout, though, due to the engine's placement still being in the front of the car, contrary to the popular belief that the engine is placed in front of the rear axle with power transferred to the front wheels (an RMF layout). In most examples, the engine is longitudinally mounted rather than the transversely as is common with FF cars.

References[edit]

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