Posted: Nov 30, 2016 1:25 pm
This is new to me, the floating arm trebuchet. The counterweight is constrained vertically and the pivot is allowed to move horizontally.
Lifeboat for the rational mind :D
http://www.rationalskepticism.org/
http://www.rationalskepticism.org/viewtopic.php?p=2497773#p2497773