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Pengun piston

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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Unread postAuthor: Mr.Sandman » Sun Oct 17, 2010 10:00 pm

Lol, ive used pencil erasers as pistons before, they work decent but they will fail quickly when your barrel eventually pushes through the soft rubber.
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Unread postAuthor: Gun Freak » Mon Oct 18, 2010 5:54 pm

SpudBlaster15 wrote:Cyanoacrylate adhesive will work fine. I've used it to bond sealing faces to pistons that are too small to accept a bolt and washer, and I have never had a failure, even at 400PSI in a T valve design.

Is that just a fancy word for super glue?
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Unread postAuthor: saefroch » Mon Oct 18, 2010 8:03 pm

Sort of... not all super glue may be cyanoacrylate, and not all cyanoacralate adhesives are super glue.

So, in a word, yes.
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Unread postAuthor: Gun Freak » Mon Oct 18, 2010 8:05 pm

Cool, if that is the way to go then I guess I'll pick some up. The face on my piston is neoprene, cut out from a rubber washer. Should this be strong enough?
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Unread postAuthor: SpudBlaster15 » Mon Oct 18, 2010 10:15 pm

saefroch wrote:Sort of... not all super glue may be cyanoacrylate, and not all cyanoacralate adhesives are super glue.

So, in a word, yes.


Most super glue is based on ethyl-2-cyanoacrylate, so yeah, just a 'fancy' (I prefer the term "Technically correct") name for the stuff you find on a shelf at a hardware store.
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Unread postAuthor: Technician1002 » Mon Oct 18, 2010 11:24 pm

Superglue is a brand name much like Pepsi is for a caffinated cola soft drink. There are other colas besides Pepsi, but the formulation varies a bit between brands. The same is true for Superglue and other cyanoacrlate glues.
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