JBarca wrote:
I can visualize the moments working, but still want to see your file.
John, how's this?
This schematic diagram represents what I would consider to be a standard spring-loaded wiper arm.
Now, think in terms of Part 2 being the ball mount, Part 3 being the ball (pivot point), Part 1 being one side of the A-frame and chassis rail, and Part 4 being the WD tensioning spring as used in the Anderson hitch. Spring tension produces a torque about the pivot point. This torque causes the wiper blade to be pressed against the windshield.
The blade's force against the windshield is the analog for the added force of a trailer's tires against the pavement. Per Newton's third law, the pavement, in turn, pushes up against the tires. It is this added upward force against the TT's tires which causes load to be removed from the TV's rear axle, with some of it being transferred to the front axle.
I think the spring-loaded wiper arm provides an excellent analogy for how the Anderson hitch can function as a weight distribution hitch.
Ron