Pneumatic soda can cannon on Mythbusters? Answered
I just watched a Mythbusters where they made a pneumatic soda can gun. Go to 5:50 in this video to see their description of it. Go to 7:00 to see it in action.
My questions are:
what is the "fast acting valve" he used?
How do you refill that thing?
Anyone seen an instructable for something similar? I've seen lots of PVC versions, but I like the metal version because it's sexier looking, and potentially higher pressure/power.