My profile pix is my first attempt. As you can see, I was losing a lot of energy through the barrel bore & fuse hole due to making them to big. I will specify hole sizes in the drawings.
BTW: I checked the speed yesterday and it seemed to average between 260 & 280 FPS.
When I frist looked at your profile pic, I thought that was grinder sparks or something, Now looking close I can see the cannon. You were loosing a lot of pressure at that time.
what type of metal are you using on the barrel.
The barrel & carriage are all made from 6061 aluminum. I shot it 10 times in a row yesterday with just reloading time in between and the barrel didn't even get warm. I think the aluminum is going to work fine for this. Should I decide to make something larger, I definitely go for some form of steel.
I have seen some small ones made out of brass, but not alum. Although the size of this is not as big as the others I have seen. If you do decide to schetch up some drawings. I am very interested. (wife and animals might not be once done) what size charge are you using as that did look like a slot of sparks in your profile pic.
In the vid did it go all the way through the can or just the one side.
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