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by MRR
Tue Feb 17, 2009 2:58 pm
Forum: Pneumatic Cannons
Topic: taking a shot ...
Replies: 4
Views: 608

That's pretty the same gun that i build. I always had trouble with the ,full body, hot glue piston and a blow gun. It simply didn't produced enough negative pressure to make the piston hit back. A 1/2" ball valve works fine though. I would consider to try another piston design. A M6 bolt, washer and...