The WDH doesn't necessarily distribute the weight by thirds. Ideally it would, but that would mean the distance from the tires on the TM to the rear axle on the TV would be equal to the wheel base of the TV, or very close to it. This gets into figuring of "moments" which involves the distances from a point to each axle times the weight of the axle. Ideally this would not change once the WDH is "set". However, since towing is dynamic, not static, the actual weight distribution is an ever changing equation due to changes in the road and driving conditions - i.e. braking, acceleration, hills, curves, bumps, swales, curbs, driveways, etc. The best we can do is to adjust the WDH as best we can when static and hope it's "close enough" to absorb the road variations. (Note: It's is possible to put too much weight on the trailer axle if the WDH isn't adjusted properly.)
|