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2" Golf/Tennis Ball Shoulder Launched Cannon + Damage!

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: MrCrowley » Thu Aug 11, 2011 9:53 pm

If you're using closed-cell foam, when you put pressure in the pilot it will compress the foam and when the piston opens it will slam in to the already compressed foam. The bumper could still work fine but the energy the piston would exert on the foam to compress it will have been loss as the foam is already compressed.

You need to use open-cell foam so that the pressure can equalise on all sides and not compress it.
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Unread postAuthor: Jabingo19 » Thu Aug 11, 2011 10:47 pm

Yeah it is open cell foam, so I'm good there, I had tried closed cell at first an I smashed it a few time with a hammer first to make sure it would withstand and it flattened out. This rubber stuff withstood the hammer :)
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Unread postAuthor: qwerty* » Fri Aug 12, 2011 1:44 am

holly cow! great damage pics
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