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Rear overhang may present a problem in large vehicles such as buses. Long rear overhang would require the driver to pay attention to nearby vehicles when turning at 90 degrees. Since the rear overhang is outside the wheelbase, it may hit a vehicle in the adjacent lane, especially when turning 90 degrees right (in a right-hand drive country).
In car style design terms, this is the amount of body that is beyond the wheels or wheel arches. In general, the sum of the front and rear overhangs is equal to the overall length minus the wheelbase. Typically, the rear overhang is larger on rear-wheel drive cars, while the front overhang is larger on front-wheel drive cars. [4]
The Volvo B7L is a fully low floor single-decker bus, double-decker bus and articulated bus chassis with a rear engine mounted vertically on the left of the rear overhang. It was built as a replacement for the Volvo B10L, and the Volvo Olympian, used as both a single-decker bus and a double-decker bus chassis largely in Continental Europe.
It was built as the British bus operators seemed hesitant to purchase the B7L double decker with a long rear overhang (although some have since entered service in Glasgow, Scotland as 12 m long double deckers). The B7TL chassis was designed by the Leyland Product Developments consultancy based at the Leyland Technical Centre.
Scania K-series urban buses pioneered steerable tag axles in New Zealand, which became a requirement for buses between 12.6 m and 13.5 m in length. Because Scania K-series buses had a longer rear overhang than competing makes, the allowable overhang with a steerable tag axle was increased from 4.25 m to 4.5 m.
β° = Breakover angle; C = Underside of chassis; W = Wheel; G = Ground; M = Midpoint of wheelbase Example of a vehicle at a significant breakover angle.. Breakover angle or rampover angle is the maximum possible supplementary angle (usually expressed in degrees) that a vehicle, with at least one forward wheel and one rear wheel, can drive over without the apex of that angle touching any point ...
[1] It is defined as the angle between the ground and the line drawn between the front tire and the lowest-hanging part of the vehicle at the front overhang. [ 2 ] [ 3 ] Departure angle is its counterpart at the rear of the vehicle – the maximum ramp angle from which the car can descend without damage.
One justification for this was that luxury cars in those days had such an extended rear overhang that the exhaust pipe scraped the ground when the car traversed ramps. The fashion disappeared after customers noted that the rear end of the vehicle is a low-pressure area that collected soot from the exhaust, and its acidic content ate into the ...