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Six-wheel drive

From Wikipedia, the free encyclopedia

Oshkosh MTVR, a six-wheel drive military truck with full-time all-wheel drive and super single tires on all axles
Oshkosh MTVR, a six-wheel drive military truck with full-time all-wheel drive and super single tires on all axles

Six-wheel drive (6WD or 6×6) is an all-wheel drive drivetrain configuration of three axles with at least two wheels on each axle capable of being driven simultaneously by the vehicle's engine. Unlike four-wheel drive drivetrains, the configuration is largely confined to heavy-duty off-road and military vehicles, such as all-terrain vehicles, armored vehicles, and prime movers.

6-wheel British-manufactured military Alvis Stalwart 6×6 with three evenly spaced axles and full-time 6x6 H-drive
6-wheel British-manufactured military Alvis Stalwart 6×6 with three evenly spaced axles and full-time 6x6 H-drive

When such a vehicle only has six wheels by definition all are driven. When it has ten – with two pairs of ganged "dual" wheels on each rear axle as on a GMC CCKW – all are also driven but the 6×6 designation remains. For most military applications where traction/mobility are considered more important than payload capability, single wheels on each axle (often referred to as super singles) are the norm.

Heavy hauler and ballast tractor 6×6s have had a long history as prime movers both in the military (as tank transports and artillery tractors), and commercially in logging and heavy equipment hauling both on- and off-road.

Most six-wheel drive vehicles have a forward axle and two at the rear (with only the front pair steering), or three evenly spaced in varying steering configurations. Depending on the vehicle's role, the number of wheels varies between six (in three pairs) and ten (with two in the front and two dual axles with four wheels apiece in the rear). Drive may be limited to the rear two axles for on-road use.

Examples

Military

Military/commercial

Commercial

Conversions

Recreational ATV/UTV

  • Polaris Industries has produced a number of six-wheel drive ATVs and UTVs for many years, based on a standard Magnum, Sportsman or Ranger with an extra axle and a cargo box over the rear wheels.

Concept cars

Mercedes-Benz G63 AMG 6x6 with twin rear axles
Mercedes-Benz G63 AMG 6x6 with twin rear axles

Concept car, testbed, and limited production commercial examples include:

Twin front axle

Twin rear axle

  • Bogie-drive (Twin axle) 6x6 vehicles are built by 6x6 Australia Pty Ltd and have full load-sharing coil-spring rear suspension with full-time bogie-drive

(Twin axle) drive in the rear, and an integrated "roll steer" function built into the suspension design. All 6x6 Australia Pty Ltd vehicles are ADR-compliant with IPA for both "heavy" and "light" vehicles.

Gallery

See also

Notes

  1. ^ "Hennessey Ford VelociRaptor 6×6". hennesseyperformance.com. Retrieved January 28, 2019.
This page was last edited on 17 November 2019, at 21:52
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