Forum Discussion
willald
Jun 08, 2005Explorer II
Ron Gratz wrote:
Will, I'm still waiting for Milt to explain how a 4-bar linkage, whose links are connected via bearings, can be rigid ("locked up")when the hitch is aligned straight ahead, but be free to move otherwise.
Perhaps the linkage utilizes magic bearings which sense the articulation angle and "lock up" at zero angle but "free wheel" at non-zero angles. Or, perhaps, a magic diagonal brace materializes at zero angle to convert the 4-bar linkage into two rigid triangles. And, the brace then vanishes at non-zero angles. If it ain't magic, what is it?
hehehehe, alright, Ron, lets not get sarcastic here with the talk about 'magic'. Thats what makes these things get ugly.
I agree, that it does not 'lock up'. However, I think we can agree, that from the trailer standpoint it is somewhat 'virtually locked', in that the direction the trailer is forced to pivot is such that the trailer almost cannot pivot that way.
Can you agree, Ron, with the summary I provided in the last post?
Will
About Tow Vehicles
From fifth wheels to teardrop trailers and everything in between.244 PostsLatest Activity: Apr 27, 2026