Hensley Arrow: How does it REALLY work?

bettered wrote:
...I'm still thinking about the side links (maybe I should call them the short links for clarity). I'll go have another look, but it's not them that interfere at the limit of travel, it's those ears in the middle of the front link that bump the links on either side at the limit. I think there is a point when the two links are either at or nearly at right angles to each other near the limit of travel. The T formation, The last 30 degrees or so of front link rotation are what's bringing me to that conclusion. Otherwise the ears in the center of the rear link couldn't be the stop...

If you take the "entertaining" popsicle stick model and rotate the rear bar clockwise while fixing the top bar in place, you'll see that as the rear bar approaches its "limit" the side link on the right is starting to come back down. This will begin to bring the rear link back down in a counterclockwise direction. I would guess that the "stop" is there to prevent the side link from continuing any further in that direction. Otherwise the rear bar would just continue doing figure-8s.

Note that the position of the red links are at the extent of clockwise rotation the rear bar can achieve.


Tim