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Pneumatic 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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Pneumatic question

Unread postAuthor: Spitfire » Mon Jun 02, 2008 10:15 am

ok i get that a pneumatic works with compressed air in a chamber that is released via a piston that then gets directed out through a barrel. My question is, how do valves release this air? And must the pistons be made in a specific way?
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Re: Pneumatic question

Unread postAuthor: MaxuS the 2nd » Mon Jun 02, 2008 10:19 am

Spitfire wrote:ok i get that a pneumatic works with compressed air in a chamber that is released via a piston that then gets directed out through a barrel. My question is, how do valves release this air? And must the pistons be made in a specific way?


Not all pneumatics use pistons, some use ball valves, sprinkler valve or even the odd hammer valve.
Valveless guns operate because the ammo blocks the barrel port, when the pressure reaches a ceratin point, the projectile is pushed up along the barrel.
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Unread postAuthor: Spitfire » Mon Jun 02, 2008 10:26 am

thanks, i understand the whole concept now. so basicalt in between the chamber and barrel you have your valve that releases the pressure from the chamber.
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Unread postAuthor: TurboSuper » Mon Jun 02, 2008 10:28 am

Ya'know, there's a nice sticky in this very section entitled "Piston Valves Explained Visually", and as for building one, I think you'll find enough topics on that very subject in the archives.
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Unread postAuthor: Spitfire » Mon Jun 02, 2008 10:30 am

i saw the sticky. i have just been lazy to check how the are made. Guilty as charged :oops:
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Unread postAuthor: MrCrowley » Mon Jun 02, 2008 2:19 pm

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Unread postAuthor: Brian the brain » Mon Jun 02, 2008 2:30 pm

I suggest a mod deletes this topic.To stay in SF terms, it creates dead space.

We need a tutorial for newbies on spudfiles, that teaches them to read up first before they post topics like this.

@ spitfire: I'm not mad..Hope to see you learn and grow here, and especially in pneumatics ( my favorite :D )

Just don't ask people to spoonfeed you.We've had countless topics like this and they use up server space, while all the info is already out there.

Just take the time to read up.
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Unread postAuthor: MrCrowley » Mon Jun 02, 2008 2:48 pm

I'm only allowing this as a test on BC's theory. I want to see what happens if we do a little spoonfeeding every now and then.


Edit: Though the OP really should've done some searching. His last post was a bit annoying saying that he had seen the sticky, but he'd prefer to get someone else to tell him how everything works then read it himself.
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Unread postAuthor: Spitfire » Tue Jun 03, 2008 7:54 am

I looked through the sticky, so basicaly there must be a minute gap between the piston and chamber, so that the chamber can fill with air through this gap. I understand the basic concept of how they work, of the higher pressure in the chamber forces the piston back and the air out the barrel. Thanks, i will look into it more so that next time i have a useful question
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