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Overhang (automotive)
Overhangs are the lengths of a car which extend beyond the wheelbase at the front and rear. They are normally described as front overhang and rear overhang. Practicality, style, and performance are affected by the size and weight of overhangs.
Along with clearance, length of overhangs affects the approach and departure angles, which measure the vehicle's ability to overcome steep obstacles and rough terrain. The longer the front overhang, the smaller is the approach angle, and thus lesser the car's ability to climb or descend steep ramps without damaging the front bumpers.
==Advantages==
Large overhangs contribute to large vehicle dimensions, and the associated advantages of size. On front-engined saloon/sedans, measuring rear overhang is helpful in predicting the size of the trunk. For these same vehicles, large front overhangs can accommodate larger engines. The Porsche 911, produced since 1964, has always contained its entire flat-6 engine within its rear overhang, with the center of mass of the engine outside of the wheelbase. Large overhangs also contribute to safety due to increased bulk, as well as space for crumple zones that provide defense for passengers in frontal and rear collisions. In the case of the 911, the rear-mounted engine allows for increased practicality in the form of a small rear row of seats that would be impossible with a mid-engined sports car.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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