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III FIFTH WHEEL
14th June 2007, Page 24
14th June 2007
Page 24
Page 24, 14th June 2007
— III FIFTH WHEEL
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Why is the fifth wheel so called?
The term comes from the old four-wheel horse-drawn carriages and wagons. The fifth wheel allowed the front axle assembly to pivot in the horizontal plane, to improve the wagon's turning capability.