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coaxile piston valve

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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coaxile piston valve

Unread postAuthor: singularity » Tue Jan 02, 2007 5:59 pm

simple questions guys, in a coaxial that uses a piston to seal do i need to put o rings on the outer edges of the piston (you know that part that comes in contact with the camber)? and how big should i make the equalization hole?

ps - holy crap theres spell check now sweet
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Unread postAuthor: ProfessorAmadeus » Tue Jan 02, 2007 6:06 pm

No you dont HAVE to use O-rings but they would help. If you dont use o-rings then you dont need an equalization hole.

Wheres spell check?
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Unread postAuthor: singularity » Tue Jan 02, 2007 7:06 pm

when spell a word wrong it underlines it in red then you right click on the word to change its spelling it awesome!
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Unread postAuthor: MrCrowley » Tue Jan 02, 2007 7:22 pm

what are you saying you can't spell? jkz

Yeah the prof answered it but O-rings do increase performance,im not sure how much but Im not sure if its worth it to make the o-ring grooves if you dont have a lathe


Where is the spell check?
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Unread postAuthor: singularity » Tue Jan 02, 2007 7:29 pm

well i have a lathe but its only a wood lathe, any simple way to make perfect groves with a wood lathe

on the spell check there isn't actually a button but when a word is spelled wrong its underlined (at least on my computer) and i can right click on that word to correct its spelling
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Unread postAuthor: squeaks » Tue Jan 02, 2007 10:42 pm

Spudwiki, type o-rings into the search or go to piston valves and click on o-rings. It gives a whole overview on how to do 'em.
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Unread postAuthor: killagorrila99 » Tue Jan 02, 2007 10:46 pm

O-rings are an exelent addition to any piston cannon. For some reason I dont have spell check.
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Unread postAuthor: CS » Tue Jan 02, 2007 11:20 pm

The forums don't have a spell check, it's called you have Fire Fox V2.

Many use the small gap from not having a o-ring seal, as the equalization point. The same reason why you don't need a lathe for a barrel sealing valve.
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Unread postAuthor: ProfessorAmadeus » Tue Jan 02, 2007 11:22 pm

O-rings will make a big difference in performance so they are recomended. If you wood lathe has a self centering chuck then it will work (thank gort for that info).
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Last edited by ProfessorAmadeus on Tue Jan 02, 2007 11:25 pm, edited 1 time in total.
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Unread postAuthor: killagorrila99 » Tue Jan 02, 2007 11:24 pm

Well I made o ring groves with a knife with my hot glue piston. It works well.
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