What do you get when you combine ancient designs with modern engineering? An exciting new way to convert time and money into heat and noise! I'm not sure whether to call this a catapult or a trebuchet, but it's definitely the superior siege engine.

3d drawing of the arm: https://grabcad.com/library/supersoni...
Simulation tool: https://github.com/Ennsye/CDT
Instruction manual for the simulation tool: https://www.overleaf.com/read/ftdshxy...

There are several safety problems present in this video. I would hope it goes without saying, but the lack of eye protection and proximity to the line of fire while cranking are bad ideas. Don't do that.

Errata: at 14:00, I say 1/66. The actual value is 1/32. This doesn't affect the speed measurement, but reflects an error in the video editing.