Destin at Smarter Everyday has made a see threw Potato Gun. That doesn't sound like much but add a high speed camera at night and it's Freakin Awesome!!! He uses 2 different ignition points so I'd like to see him run the spuds threw a crono and compare the two. Watch it, you just mite leant sum tin.
https://m.youtube.com/watch?v=_TNSUIsjdpY
https://m.youtube.com/watch?v=_TNSUIsjdpY