this was at alexander ny tractor show. THIS IS NOT MINE!!!! first one shoots pumpkins real far. it used a huge air compressor (were talkin 4 or 6 cylinder to power it) to fill up the hole chamber you see. butterfly valve letts it all out. aluminum barrel screws off and moves so a pumpkin can be loaded.
the second one is pretty cool. it uses small pumpkins or potatos in a pvc shell. the barrel hydraulicly moves, a shell is droped in then hydraulicly closed. some kind of electronic valve and the whole thing swivels so children can aim.