Page 2 of 2
Posted: Tue Jul 11, 2006 6:12 pm
by noname
Well This is a really easy way to do it. Let me just draw something up real fast. Green is a bolt, blue are nuts, black are o-rings, and white are washers that hold the o-ring in place. You need a washer on both sides of the o-ring though. It only looks like one because the picture is really small.
Posted: Tue Jul 11, 2006 7:20 pm
by Mihlrad
thats not easy at all, you need to find o rings and washers that make the perfect size.... i was considering expanding foam but i was unsure if it would make a perfect cylinder.
Posted: Tue Jul 11, 2006 9:40 pm
by carlbelcher
Hot glue works just fine, but don't leave your cannon outside on a hot sunny day.
EDIT
You can also make your piston out of a PVC end cap, a 3" end cap fits great in a 4" pipe.