Quote:
Originally Posted by skyking
the line of force is below the centerline of the rear axle, so that pulling force will impart a downforce on the front axle.
|
Sure. What I was getting at is that tractors and highway vehicles are quite different. With tractors, the load is almost all pull: the downwards tongue weight is usually tiny by comparison. With highway trailers, the tongue weight is proportionately larger than the pulling load (and except with 5th wheels) applied further behind the rear axle, thus the pictures of overloaded tow vehicles with their wheels in the air and rear bumper on the ground.