[RogerR]

Originally Posted by s_forbes

I recall team 67's 2008 robot as having one of my favorite linkage mechanisms (at least conceptually... implementation looked painful ). Spring loaded extending member in a single DOF mechanism to achieve a very unique path and stay within size constraints, very cool!

Also a big fan of 1625's over-center launching mechansim, though I've yet to use it on a robot. I'm sure a time will come.

The Thunderchickens arm from 2007 is very unique, and another favorite of mine. I used it as one of my "pick any mechanism and do a report on it" style of exams for free-body analysis in college. I wish I remember more details of my analysis, but I wasn't very good at documenting things back then.

67: http://www.chiefdelphi.com/media/photos/30680
1625: http://www.chiefdelphi.com/media/photos/31538
Short analysis on 217's arm attached as well.

Looks like you went through and picked all my favorites.

I'd add 148's 2011 four-bar, because of the clever use of the cylinder as part of the upper link.

I guess I could mention that lame 842 arm from 2011 (and its predecessors mentioned in the below thread): http://www.chiefdelphi.com/forums/sh...ad.php?t=90284