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Aluminum Cannon

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
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Aluminum Cannon

Unread postAuthor: cannon freak » Sat Sep 30, 2006 1:39 pm

Has anyone had any luck with this type of material for a gun, more specifically a hybrid.

For a 3" chamber I can safely go up to 2000 PSI with a 2X margin using 0.13333 thick aluminum tube and no its not pressure rated the wall thickness at bursting point is 0.06667". So I'm planning on using 0.125" tube. It can't be welded but my uncle can easily machine some parts up at his work for not to much and then it can all be hooked together like that, can't be welded so screws or something will be used.

The sad thing is, the aluminum is only slightly more expensive than PVC i9n my area and that's SCH 40.
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Last edited by cannon freak on Wed Oct 04, 2006 8:01 pm, edited 1 time in total.

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Unread postAuthor: jrrdw » Sat Sep 30, 2006 3:38 pm

If you use aluminum wire in a mig welder, or if you use a tig welder it can be welded, but you have to be a good welder.
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Unread postAuthor: rna_duelers » Sat Sep 30, 2006 6:26 pm

My uncle can weld aluminium with an oxytorch and AL wire but he does those kinds of things for a living.I like the idea of this gun make sure u get some plans and some pics up of it sounds interesting.
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Unread postAuthor: rocketman » Sun Oct 01, 2006 8:10 pm

The reason you can't weld some aluminum is beacause certain alloys have been heat treated, the weld would never be as strong as the rest unless it was re-heat treated.
Just some food for thought.
it sounds like a good idea if you can have everything machined and thread it all together.
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Unread postAuthor: killagorrila99 » Sun Oct 01, 2006 8:27 pm

Wouldnt that be like the sp9004?
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Unread postAuthor: cannon freak » Wed Oct 04, 2006 8:05 pm

Well Ive struck some luck, my grandfather has a friend who can mill me some stuff. I was wondering, how do you guys think I should connect my parts, I'm going to make it all threaded (much thicker than normal), but how should the pieces go together without welding?

I'm thinking of a 2000PSI gun powered by a scuba tank, by the way I don't plan on being beside this gun lol.
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Unread postAuthor: frankrede » Wed Oct 04, 2006 9:39 pm

Use primer and solvent weld on aluminum.Jk,but don't use screws.Use bolts.
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