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Semi Automatic Golf Ball 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: Gun Freak » Sat Sep 03, 2011 11:33 am

Haha, no worries.
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Unread postAuthor: CannonCreations » Sat Sep 03, 2011 11:35 am

so if I make this piston and put it into a 2" T and have a 2 inch pipe, down to a 1" pilot on one side, and a 2" to a 1.5" on the other, it will work? I am getting confused, i thought it was the size of the piston face that determined which direction it would go. will i be bale to use it the way i listed?
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Unread postAuthor: Gun Freak » Sat Sep 03, 2011 11:41 am

Sounds right, that's how I do it.
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Unread postAuthor: CannonCreations » Sat Sep 03, 2011 12:01 pm

do I need to modify the adapter, so that the 1.5" barrel goes into the T, or can I do a regular adapter, and go from a 2" to a 1.5" outside of the T?, do I have to modify anything inside of the T, or can I just put the piston in it?
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Unread postAuthor: Gun Freak » Sat Sep 03, 2011 5:35 pm

Yeah the pipe needs to go into the tee, so modify the bushing.
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Unread postAuthor: mattyzip77 » Sat Sep 03, 2011 5:45 pm

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Unread postAuthor: CannonCreations » Sat Sep 03, 2011 8:31 pm

Yes it is helpful,but one question, where does the air go in in the picture u posted, cuz if it goes in behind the pilot, it wont make it to the chamber
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Unread postAuthor: Crna Legija » Sat Sep 03, 2011 8:34 pm

CannonCreations wrote:Yes it is helpful,but one question, where does the air go in in the picture u posted, cuz if it goes in behind the pilot, it wont make it to the chamber


there needs to be a small leak between pilot and the chamber.
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Unread postAuthor: mattyzip77 » Sat Sep 03, 2011 9:26 pm

depending on the type of piston you use, you may have to make a small check valve, and or a few small equalization holes. This is what confused me when I started making ptstons!!
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Unread postAuthor: CannonCreations » Sat Sep 03, 2011 9:41 pm

If i use gun freaks washer and o-ring piston valve, like shown farther up, i wont need to make and equalization holes, will I?
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Unread postAuthor: Gun Freak » Sat Sep 03, 2011 10:10 pm

Nope, it has a check valve.
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Unread postAuthor: mattyzip77 » Sat Sep 03, 2011 10:35 pm

Thats what the xtra rubber washers are for, its a home made check valve:D
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