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quick question

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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quick question

Unread postAuthor: skyrunner06 » Sun Aug 26, 2007 4:16 pm

im making another pnumatic co-axil canon and i was going to use this design and was wondering how to mod the valve for blowgun piloting?is it the same or do you have to do something else,or can you only do it with inlines
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Unread postAuthor: boilingleadbath » Sun Aug 26, 2007 4:54 pm

My understanding is that that style of sprinkler valve doesn't work as well as the inline style; you'd be better off using an inline valve and a pair of 90* elbows.
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Unread postAuthor: skyrunner06 » Sun Aug 26, 2007 4:57 pm

now where would i put the valve on the bottom or on the top and wat should i use for 1.5" or 2" elbows?
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Unread postAuthor: Hubb » Sun Aug 26, 2007 4:59 pm

To eliminate dead space, put it on top. As far as elbows go, I built one similar and used 1" elbows (that was the size of my valve). This kept the chamber closer to the barrel, and were a lot cheaper than 1.5" or 2" elbows. Just make sure to reinforce the barrel to the chamber to keep stresses off the elbows.
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Unread postAuthor: skyrunner06 » Sun Aug 26, 2007 5:00 pm

ok i get wat u mean thanks
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Unread postAuthor: skyrunner06 » Sun Aug 26, 2007 5:02 pm

also how do i make a cheap bolt action i was going to just cut a hole in the end of the 1.5 INCH barrel and put a 1.5 INCH coupling with the edges removed from the inside
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Unread postAuthor: boilingleadbath » Sun Aug 26, 2007 5:02 pm

It's probably best to put the valve on the bottom, as it allows for more barrel length for the overall length of the launcher... but you'd best model both situations to be sure.
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