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My ammo

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: jhalek90 » Mon Sep 12, 2011 4:55 pm

I broke a 2'' porting (4'' chamber) PVC coax piston cannon using to heavy of a projectile at 65 psi :oops:

just remote fire it and you will be fine.
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Unread postAuthor: jsefcik » Mon Sep 12, 2011 6:56 pm

jhalek90 wrote:I broke a 2'' porting (4'' chamber) PVC coax piston cannon using to heavy of a projectile at 65 psi :oops:

just remote fire it and you will be fine.



Ok , so im not going to do it, considering what happen to you lol
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Unread postAuthor: danielrowell » Sat Oct 01, 2011 1:46 pm

I know this thread is a bit old, but I have a suggestion that is quite valid.

Have you ever used pykrete before? By definition, it's a frozen mixture of 14% wood pulp and 86% water by weight. It has properties rather similar to concrete, but less density, so you wouldn't have as much felt recoil. Cotton works very well as a substitute for wood pulp, perhaps even better, and the formula doesn't have to be perfect.

Just fill an empty soda can with cotton balls, add water and freeze it to make a very potent projectile. :wink:
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Unread postAuthor: stuffbuilder » Sat Oct 01, 2011 2:15 pm

I've heard of that stuff before, but quite frankly I wouldn't really consider it for projectiles. This is mostly because I live in louisiana and the weather here is usually pretty ice-unfriendly. With concrete you can make a bunch of projectiles at once and store them anywhere, but with ice you would have to keep them in the freezer. I don't understand your logic behind using a less dense projectile though. Even though there would be less recoil, a lighter projectile has less momentum and is easier to stop
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Unread postAuthor: danielrowell » Sat Oct 01, 2011 2:34 pm

I don't understand your logic behind using a less dense projectile


Many of the posts on this thread concern cannons breaking from launching projectiles that are too heavy. I just thought you and the other members might like to know a solution that would put less stress on your cannons.
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Unread postAuthor: stuffbuilder » Sat Oct 01, 2011 11:48 pm

Oh I see what you mean now. I'm just going to reenforce the barrel-frame connection though. After all, big projectiles = more damage = more fun!
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