Dual Cam Setup

mrekim wrote:
Here's another video (slow motion of a right turn). It seems as if the bar deflection decreases at some point in the turn. I wonder if, when the inside bar unloads that the outside bar can unload some too - because rather than the bar bending the suspension is affected?

Dual Cam: Slow Motion Right Turn

When the TV and TT are aligned straight ahead, the left WD bar will be angled about 25 degrees to left of the TV's centerline and the right WD bar will be angled about 25 degrees to right of centerline.
The rearward tilt of both bar trunnion axes will be less than maximum.

When the TV has turned approximately 25 degrees to the right (relative to the TT), the left bar will be parallel to the TV's centerline, and the rearward tilt of its trunnion will be at maximum.
As the TV continues to turn to the right, the rearward tilt will begin to decrease.
This means the bar loading related to trunnion tilt will increase as the TV turns from 0 degrees to 25 degrees, and the loading then will begin to decrease as the turn angle continues to increase.

We also know that, as the TV turns to the right, the load on the outside (left) bar also will increase due to "bar lift" as the bar rides forward and up over its cam.

So, in the range of 0 to 25 degrees, the load on the outside bar increases both due to both trunnion tilt and bar lift.
As turn angle increases beyond 25 degrees, trunnion tilt causes bar load to decrease while bar lift continues load to continue to increase.
My computer simulation indicates the load-decreasing effect of trunnion tilt is greater than the load-increasing effect of bar lift, so the net WD bar load begins to decrease after a turn angle of about 30 degrees.

Ron