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Piston Help

A place to ask general spud cannon related questions.
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Piston Help

Unread postAuthor: Sergeant Dotson » Sun Apr 06, 2008 12:54 pm

I don't think I understand how a piston cannon works and would like some help. I've seen the pistons before but never could understand them. Any help would be nice, so as long as it is helpful. :)

-Sergeant Dotson 8)
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Unread postAuthor: jrrdw » Sun Apr 06, 2008 12:57 pm

In detail what don't you understand?
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Unread postAuthor: Sergeant Dotson » Sun Apr 06, 2008 1:01 pm

I don't see how the piston allows air to pass into the barrel when air is exposed by a ball valve, etc.
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Unread postAuthor: jrrdw » Sun Apr 06, 2008 1:05 pm

When the ball valve is opened it lets the air behind the piston out, the piston follows the air escaping and the stored air escapes though the barrel. Thats a very basic discription. Search the SpudWiki to fill in the details.
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Unread postAuthor: SpudFarm » Sun Apr 06, 2008 1:07 pm

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Unread postAuthor: pat123 » Sun Apr 06, 2008 1:08 pm

the blow valve only lets out enough air for the piston to slide back, allowing air to go around it into the barrel
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Unread postAuthor: Sergeant Dotson » Sun Apr 06, 2008 1:12 pm

But how does the air go around the piston if it is airtight?
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Unread postAuthor: sniper hero » Sun Apr 06, 2008 1:12 pm

did you already seen this: http://www.spudfiles.com/forums/piston- ... t8157.html

it's very clear done
so just copy paste the link and see if you understand it
if you have still questions: ask

Edit: I see that in the time I wrote this reply someone already posted this link
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Last edited by sniper hero on Sun Apr 06, 2008 1:14 pm, edited 1 time in total.
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Unread postAuthor: SpudFarm » Sun Apr 06, 2008 1:14 pm

when you first get it you feel dumb that you don't understanded it before :)
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Unread postAuthor: Sergeant Dotson » Sun Apr 06, 2008 1:16 pm

Yea, I think I am starting to get it and yes, I do feel dumb.... :( :( :(
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Unread postAuthor: jrrdw » Sun Apr 06, 2008 1:17 pm

Once the piston moves back, the air in your storage chamber has a clear path out the barrel.

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Unread postAuthor: SpudFarm » Sun Apr 06, 2008 1:19 pm

pretty easy he? ;)
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Unread postAuthor: Sergeant Dotson » Sun Apr 06, 2008 1:25 pm

Yea, a lot easier than I thought. I guess I know what my next project is now, if you know what I mean. :angryfire:
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Unread postAuthor: Sergeant Dotson » Sun Apr 06, 2008 1:28 pm

Sorry for double-posting but, if the air enters the chamber in front of the pison, wouldn't it push the piston back?
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Unread postAuthor: Hubb » Sun Apr 06, 2008 1:30 pm

You would need a spring to keep the piston from moving back, assuming your putting air into the chamber.
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