2011-12-11, 05:24 PM
I'd probably set up a test rig at home with the same dimensions, cause aerodynamics on the pingpong ball will definitely affect how it flies.
As for actually triggering it, you could take design cues from a mousetrap - spring is attached to a bar, which another bar latches across to lock it in place.
![[Image: BbAyY.png]](http://i.imgur.com/BbAyY.png)
So when you lift the bar (due to removing the cheese) the spring is free to snap shut.
If you attach the ends of the elastic to eyehooks and stick each into pegboards, you can adjust the trajectory so the pingpong ball goes where you want it.
As for actually triggering it, you could take design cues from a mousetrap - spring is attached to a bar, which another bar latches across to lock it in place.
So when you lift the bar (due to removing the cheese) the spring is free to snap shut.
If you attach the ends of the elastic to eyehooks and stick each into pegboards, you can adjust the trajectory so the pingpong ball goes where you want it.