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Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: jackssmirkingrevenge » Sat Jan 07, 2012 1:57 am

Good to see you're still at it ;)

Jimmy K wrote:A smaller version of this cannon is in the works. The barrel has been halved - to 10' - and the sprinkler valves are now pilot valves. 4" piston valve, here I come.


Will you be taking any measures to reduce noise for this one?
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Unread postAuthor: Jimmy K » Wed Jan 11, 2012 6:54 pm

Actually, the one who complained has partial hearing loss now. So no haha
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Unread postAuthor: jackssmirkingrevenge » Thu Jan 12, 2012 12:53 am

Jimmy K wrote:Actually, the one who complained has partial hearing loss now. So no haha


That raised a genuine LOL :D
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Unread postAuthor: Technician1002 » Thu Jan 12, 2012 10:38 am

Feel free to pass design ideas to us to approve or rip apart. It may save you from designs that have design and safety flaws.

Congrats on the club and sponsorship.

A quick question, is 4 inch the piston OD or the valve orifice size? Valves seem to have 3 standards for measurement.

1 Pipe size such as a 1 inch sprinkler valve fits 1 inch pipe regardless of orifice or diaphragm size.

2 Orifice size. Size of the opening through the open valve.

3 Piston diameter. The pipe size and orifice sizes are often much smaller. Many 2 inch piston valves fit 1.5 inch pipe.
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