Ok, ive started this blog as a diary for the build of my Hybrid potato cannon H.V.S-1, here is the main design for it
http://i91.photobucket.com/albums/k318/spanerman30/Designconceptwithspec.jpg
Heres the estimated range and velocoty, with a marble i will be goin supersonic and with a 25g potato slug range is over 500m
