pnumatic piston

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SpudFiles Forum Index » General Spud Cannon Related » pnumatic piston

pnumatic piston

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sergeantspud2

Posted: 08/03/2005 22:10 PM Post subject: pnumatic piston

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Joined: 07 Jun 2005
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could someone explain to me how a piston works.

boilingleadbath

Posted: 08/03/2005 23:12 PM Post subject:

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Joined: 12 Mar 2005
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Same way a diaphram works... but instead of it bending causing the center to move, the entire piston moves bringing the center with it.

Spencer

Posted: 08/04/2005 19:10 PM Post subject:

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Joined: 27 Apr 2005
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Air enters behind the piston. it pushes the piston foward until it seals with the barrel. Air escapes around the piston into the rest of the chamber that surrounds the barrel. Since the pressure equalizes the piston remains sealed on the barrel because there is equal pressure on both sides. Then from the rear (the side the air entered through) the air is vented out, therefore the pressure is no longer equal and the greater pressure on the opposite side slams the piston back opening the barrel and all the air rushes out and pushes the projectile out.
Thats assuming it is coaxial.

sergeantspud2

Posted: 08/04/2005 19:33 PM Post subject:

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i think i understand so you have a T with a piston in it. you put pressure in the back of the T forcing the piston into the barrel but opening the chamber. when you let air out the the piston moves back... i get lost about there does someone have a picture of a website that explains with pictures

spudshot

Posted: 08/04/2005 20:17 PM Post subject:

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Joined: 03 Oct 2004
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when you let the air out from behind the piston (the pilot area, just like in a phragm launcher) the piston will move back because the pressure in the chamber is greater than the now empty pilot chamber, when the piston moves back, it uncovers the barrel, and all the pressure in the chamber will go thru the barrel

sergeantspud2

Posted: 08/04/2005 20:21 PM Post subject:

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Joined: 07 Jun 2005
Posts: 315
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oh i got thank you Very Happy

Spencer

Posted: 08/08/2005 12:52 PM Post subject:

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Joined: 27 Apr 2005
Posts: 25
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Go here for a visual explanation if you are registered for spud tech forums: http://forums.spudtech.com/topic.asp?TOPIC_ID=7432
Pretty hard not to understand watching that.

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