piston questions

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SpudFiles Forum Index » Pneumatic Cannon Discussion » piston questions

piston questions

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Posted: 06/23/2008 1:18 AM Post subject: piston questions

Master Sergeant

Joined: 17 Aug 2006
Posts: 156
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How far will the piston travel once the pilot is dumped?

and at what point of travel is the majority of the psi gone from the chamber?

I'm an idiot.... can someone please move this to the pneumatic discussion for me.

Last edited by jr on 06/23/2008 1:22 AM; edited 1 time in total

MrCrowley

Posted: 06/23/2008 1:22 AM Post subject: Re: piston questions

Blizzard of Ozz
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Joined: 23 Jun 2006
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jr wrote:

How far will the piston travel once the pilot is dumped?

and at what point of travel is the majority of the psi gone from the chamber?

Well in a frictionless enviroment, the piston will keep going.

It will go until it is told to stop by something we like to call 'the bumper'. Rolling Eyes

For the second question, probably when the piston has travelled half way.

jackssmirkingrevenge

Posted: 06/23/2008 1:26 AM Post subject: Re: piston questions

space monkey
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jr wrote:

How far will the piston travel once the pilot is dumped?

and at what point of travel is the majority of the psi gone from the chamber?

There are too many variables to give you an answer - it depends on how big your chamber is, how heavy and tight your piston is, what psi you're using and how good your pilot valve is.

Posted: 06/23/2008 1:28 AM Post subject:

Master Sergeant

Joined: 17 Aug 2006
Posts: 156
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so any time after the half-way point I can stop the piston travel? Do all those veriables realy affect the distance a piston travels and how soon it can be stopped and returned..I know that the pilot volume will have an affect on the travel speed.. and that was the next big question.

Last edited by jr on 06/23/2008 1:40 AM; edited 1 time in total

MrCrowley

Posted: 06/23/2008 1:30 AM Post subject:

Blizzard of Ozz
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No.... You find the optimum piston travel and let the piston travel that far.

There is no 'halfway' point in a piston. EVERY PISTON IS DIFFERENT IN THEIR OWN UNIQUE WAY. NO PISTON IS THE SAME. Rolling Eyes

I suggest you do a lot more research. No offence.

jackssmirkingrevenge

Posted: 06/23/2008 1:40 AM Post subject:

space monkey
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For the record, your piston only needs to travel between 25 to 50% of the barrel diameter for maximum efficiency.

Here's some theory for you to contemplate Wink

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