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Frist cannon

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: ewok11 » Sat Mar 03, 2012 3:40 am

yes they are indeed fire extinguishers . they were used at work intill for some reason they changed them all so just happen to have 20 of these!

Large bore is the only way to go!
downloaded GGDT last nite and filled it out and it tells me the the ball is going 157 meters a second is this gd? only 197m/s to i get to super sonic! LOL
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Unread postAuthor: jackssmirkingrevenge » Sat Mar 03, 2012 11:23 am

ewok11 wrote:downloaded GGDT last nite and filled it out and it tells me the the ball is going 157 meters a second is this gd? only 197m/s to i get to super sonic! LOL


given the fact that you have a large chamber, long barrel and fast valve, and you're shooting a very low density projectile, this is quite believable.
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