What is double axle steering?

Answer 1

This is a type of steering most commonly used on vehicles carrying large loads such as fixed bed lorries, it is essentially when such a vehicle has more than one steering axle. It can either be the front two axles in a six axled vehicle or both axles in a vehicle with the usual two axles. If it is two front axles then the degree of steering angle on the second axle is much less than the first and is dictated by the distance between the two front, and the distance to the next axle, as well as the length of the axles themselves. On a vehicle with just two axles where both are steering then the rear is used as a method of improving cornering abilities, on a normal corner they must steer in opposite directions but in certain such vehicles - like Monster Trucks - the steering is independent to allow the vehicle to 'crab' sideways, vastly improving manouverability.