Ex Wilson, NC Truck 1

[Roto-Ray]

On an All-Steer system, all axles are steerable, either in "coordinated" or "crab" mode.  In coordinated mode, both rear axles steer the opposite direction of the front axle, allowing a much tighter turn radius and decreased tire wear.  The cramp angle of the first rear axle is less than that of the second rear axle, which allows smooth turns without dragging the tires.  In crab mode, all axles will steer the same direction, allowing the vehicle to walk to the left or to the right.  All-Steer vehicles have single tires on all axles.

 

Dave, have you had a chance to see the new Pierce T3 AWS?  It's an always-live, all-mechanical AWS system that I anticipate will change how Pierce aerials are purchased by most customers.  On the T3, the front tandem turns at 3 degrees, and the rear tandem steers at 6 degrees.  No tail swing, and smooth enough to drive over speed bumps at 35mph and not feel them.