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Neoprene sheets

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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Neoprene sheets

Unread postAuthor: Arborman » Mon Apr 02, 2007 8:36 am

I have always wanted to make a nice piston valve, but the only one I knew how to make required a lathe. I don't have a lathe.

I want to make a three inch version of Brian the Brain's no o- ring piston valve. http://www.spudfiles.com/forums/viewtop ... 385b5e4161

I know I can get the sheet from mcmaster, but I do not know which one will work.
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Unread postAuthor: chaos » Mon Apr 02, 2007 8:43 am

heres what mine looks like:

-uses rubber washers instead of o-rings.
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Unread postAuthor: Arborman » Mon Apr 02, 2007 9:39 am

That is a pretty sweet design

Anyone have an answer to my question?
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Unread postAuthor: CS » Mon Apr 02, 2007 1:52 pm

Using Chaos's design, you would not need to purchase a neoprene sheet. If you have a different design in mind however, I would suggest something like:

    1/8" thick
    60A-70A Durometer Rating
    Smooth on at least one surface
    No need for any under strict tolerances (they will just cost more)
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Unread postAuthor: Arborman » Mon Apr 02, 2007 2:00 pm

will this work?
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Unread postAuthor: CS » Mon Apr 02, 2007 2:23 pm

Yes, it will. Although here is something that is about half again as cheap:

9455K874
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