Hensley Arrow: How does it REALLY work?
There have been several discussions on this hitch that have become somewhat 'controversial'. I am NOT trying to stir this controversy/bashing back up. Instead, I'd like to see a good, intelligent di...
Forum Discussion
willald wrote:
...For starters: HERE is a basic illustration, showing the trapezoid/4 bar linkage, that the Hensley uses to eliminate sway. Some of the details of this description have been accused of being inaccurate, but this still provides a good starting point. I have actually measured our Hensley head, and found that the two side bars are about 4.5" long, the rear (longer) bar on the trailer side is about 8", and the front bar is about 7.25" long...
I sketched the geometry up in SolidWorks and plugged in the numbers you provided for the link lengths. The furthest forward the "virtual" pivot point (if we're using VPP to describe the projected intersection of the two side links) is of course when there is no angle between the TV and the TT. Using your numbers, that point is 43.35 inches in front of the "front bar" (the bar that makes a T with the TV).
Of course, this is using Will's numbers which I believe are only guestimates. We'd have to know the actuals to determine how far up the VPP really is.
Tim
