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
I totally agree with you Mr. Whittaker. The linkage only works one way, and Mr. Gratz continues to want it to work 2 ways, and insists that it does, despite two great big steel bars. All of the talk about the VPP is simply nice to know, and it only applies if the tow vehicle is turning.
For practical purposes, despite all statements to the contrary, if the linkage only works one way, from the tow vehicle to the trailer, the connection that the travel trailer sees is rigid when it is under tow.
I spent a couple of hours playing with mine over the long weekend, and after getting all greasy, and suffering back strain, it looks like a simple explanation will suffice.
If the 4 par linkage is angled such that an attempt to turn it from the tow vehicle end allows it to do so readily, the same angles will act against it turning from the travel trailer end, or as Tkluxon previously posted, greatly resist such turning, by dint of its having to move the tow vehicle to do it.
Only the two links move, and unless the tow vehicle is turning, both cross bars are held parallel.
It is not possible to describe how it works unless it is described dynamically, in short, do not remove any contact with the ground, but take the various loads and friction into account.
It takes a little mental calculus to do it, but heck, even a psychologist can do that.
For practical purposes, despite all statements to the contrary, if the linkage only works one way, from the tow vehicle to the trailer, the connection that the travel trailer sees is rigid when it is under tow.
I spent a couple of hours playing with mine over the long weekend, and after getting all greasy, and suffering back strain, it looks like a simple explanation will suffice.
If the 4 par linkage is angled such that an attempt to turn it from the tow vehicle end allows it to do so readily, the same angles will act against it turning from the travel trailer end, or as Tkluxon previously posted, greatly resist such turning, by dint of its having to move the tow vehicle to do it.
Only the two links move, and unless the tow vehicle is turning, both cross bars are held parallel.
It is not possible to describe how it works unless it is described dynamically, in short, do not remove any contact with the ground, but take the various loads and friction into account.
It takes a little mental calculus to do it, but heck, even a psychologist can do that.
