Forum Discussion
JBarca
May 10, 2013Nomad II
Ron,
I knew you could not stay away from this post...:C Thanks for the info. Much appreciated.
Your post still has me reading... I have not been able to find Andy's "Why is your hitch crooked?", in the Summer 2010 edition of AIRSTREAM LIFE magazine. However I did run into a 2011 post talking about it with Wes, Ron and my spring bar data... I must of been out camping then.... Missed a good hitch talk. Best Weight Distributing Hitch with Sway Control?
For me, the jury is still out on how effective the tilted hitch head concept combined with thinner than normal WD bars and drum wrapped chain hook up brackets is in mitigating sway.
However Blue Ox, a stand up company with good quality products changed there underlying working principle of their only WD hitch.
The older Sway Pro like this
To the new Sway Pro like this:
The older unit at least had adjustable friction in the hitch head. The new unit is totally relying on this steering effect to create a level of anti sway control. This sort of leaves us with ???
In regards to the progressive spring rate, Blue Ox "might" have a progressive force increase from the drum style chain bracket. In order the prove or disprove this to myself, I need to do a layout of the chain wrap action on a drum in regards to the vertical lift of the WD bar per angle of hitch head rotation. If the vertical displacement of chain pull increases with WD bar swing with an increase in angle between the TV and TT as viewed from the top, then the WD bar is being lifted progressively more on their rotary chain bracket then a conventional snap up over center chain bracket. I need a good hitch experiment to stimulate my curiosity. :)
Thanks
John
I knew you could not stay away from this post...:C Thanks for the info. Much appreciated.
Your post still has me reading... I have not been able to find Andy's "Why is your hitch crooked?", in the Summer 2010 edition of AIRSTREAM LIFE magazine. However I did run into a 2011 post talking about it with Wes, Ron and my spring bar data... I must of been out camping then.... Missed a good hitch talk. Best Weight Distributing Hitch with Sway Control?
For me, the jury is still out on how effective the tilted hitch head concept combined with thinner than normal WD bars and drum wrapped chain hook up brackets is in mitigating sway.
However Blue Ox, a stand up company with good quality products changed there underlying working principle of their only WD hitch.
The older Sway Pro like this
To the new Sway Pro like this:
The older unit at least had adjustable friction in the hitch head. The new unit is totally relying on this steering effect to create a level of anti sway control. This sort of leaves us with ???
In regards to the progressive spring rate, Blue Ox "might" have a progressive force increase from the drum style chain bracket. In order the prove or disprove this to myself, I need to do a layout of the chain wrap action on a drum in regards to the vertical lift of the WD bar per angle of hitch head rotation. If the vertical displacement of chain pull increases with WD bar swing with an increase in angle between the TV and TT as viewed from the top, then the WD bar is being lifted progressively more on their rotary chain bracket then a conventional snap up over center chain bracket. I need a good hitch experiment to stimulate my curiosity. :)
Thanks
John
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