Dual Cam Setup
I'm working on setting up a new Reese Dual Cam setup. I think I need a 1" extended ball, and wonder if I would benefit from a 2". Here's are some photos of where I'm at now: Side view, I think...
Forum Discussion
Effect of TV/TT Angle on Dual Cam Bar Loads – WD Bar Lift vs TV/TT Angle
Thanks to John Barca’s mastery of experimental design and measurement, we now are able to calculate the effect of TV/TT angle on dual cam bar loads.
John’s recent studies have measured 1) WD bar lift when sliding over the cam and 2) the effect of TV/TT angle on the tip height of an unloaded bar.
The first of these relationships is shown below as a function of TV/TT turn angle.
These data are for the outside WD bar at three TV/TT angles of 15, 30, and 45 degrees.
The bar tip is being pulled forward relative to the cam and slides up over the cam as it moves.
The lifting of the tip increases the curvature of the cantilever bar which, in turn, causes the bar to exert greater downward force on the cam.
Excellent photo documentation of John's data collection project is presented in this thread.
As shown in the last image of John's thread, the inside bar initially will lift and then will begin to drop until it becomes completely unloaded if the turn is sharp enough. We just don't know how far it will lift and drop.
For Christmas, I would like to ask the Data Santa Claus (a.k.a. "JBarca") if he could find time to measure the bar lift versus turn angle when the bar moves rearward relative to the cam. This would give us a better handle on how the inside bar unloads.
Thanks in advance, Santa. :)
Ron
Thanks to John Barca’s mastery of experimental design and measurement, we now are able to calculate the effect of TV/TT angle on dual cam bar loads.
John’s recent studies have measured 1) WD bar lift when sliding over the cam and 2) the effect of TV/TT angle on the tip height of an unloaded bar.
The first of these relationships is shown below as a function of TV/TT turn angle.
These data are for the outside WD bar at three TV/TT angles of 15, 30, and 45 degrees.
The bar tip is being pulled forward relative to the cam and slides up over the cam as it moves.
The lifting of the tip increases the curvature of the cantilever bar which, in turn, causes the bar to exert greater downward force on the cam.
Excellent photo documentation of John's data collection project is presented in this thread.
As shown in the last image of John's thread, the inside bar initially will lift and then will begin to drop until it becomes completely unloaded if the turn is sharp enough. We just don't know how far it will lift and drop.
For Christmas, I would like to ask the Data Santa Claus (a.k.a. "JBarca") if he could find time to measure the bar lift versus turn angle when the bar moves rearward relative to the cam. This would give us a better handle on how the inside bar unloads.
Thanks in advance, Santa. :)
Ron
