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Shrader valve screw on

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Shrader valve screw on

Unread postAuthor: Sticky_Tape » Sun Feb 10, 2008 3:46 pm

Hello I have a problem with a launcher I am making it is sort of a shell pneumatic and what I need is some attachment that can screw onto the shrader on the shell if I don't the piston in the shell will keep venting can sombody give the name of a attachment that can screw onto the shrader?
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Unread postAuthor: Hawkeye » Sun Feb 10, 2008 3:55 pm

A schrader seals itself. When you remove the pump, it won't leak. Many tires are left uncapped and hold pressure for long periods.
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Unread postAuthor: Sticky_Tape » Sun Feb 10, 2008 4:06 pm

Wait you don't understand. They shell that I am making has a low pilot camber volume and when you take off the pump a small amount of air comes out the same amout of air that would vent the piston I need a attachment that will stop that amount of air coming out of the shell when I take the pump off. What I am trying to say is I need the needle in the shrader not to be pushed in so that the air wont come out when I take the pump off.
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Unread postAuthor: Maniac » Sun Feb 10, 2008 6:54 pm

A ball valve! :o
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