SpudFiles

Welcome back, Gunfreak. NOW BUILD SOMETHING! I might design a large bore soup can launching monster. I think my next cannon should have enough recoil to just about put me on my ass. It's called for.

JSR, could it be an option to apply an abrasive polishing paste between the rough parts and work them back and forth, allowing them to polish themselves in a natural way? Just a thought. I'm sick with jealousy by the way. SICK! Not coronavirus sick, but still quit green with machine envy :mrgreen:

What size? Also, I don't think low friction would increase performance much. What are your requirements for the cannon? Ammunition, barrel size, construction material etc.

I got no problem s##ting right into the barrel myself. Hey JSR, can I borrow your chrony to see how fast it goes?

Drill hole in golf ball and attach with self tapping screw through the dart tube. Think they will work good? I didn't mess with center of gravity or anything. Could be fairly cheap and easy to install. Might be awesome.

I confess that I've not really thought about the details of the valving since I doubt I'd get the funding to build such, burst disks work well, and burst disks are a negligible cost in the Big Picture. The point being that whimsy aside, the gun would almost certainly use burst disks. With the valve...

Bore: 24 inch. Barrel length: 60 feet. Break action. Barrel on a carriage system such that the breach can be opened/closed without raising/lowering the CG of the barrel. This means easy movement despite the size. Valved would, of course, be nice, but I've had good luck with burst disks. Propellant:...

Describe what you feel would be the ultimate potato cannon. Bore size, pneumatic or combustion, power class, features such as spud cutting and breach loading, ease of use should be very important as well, etc etc. Consider all you have seen and learned from this hobby over the years and use your min...

JSR, if you reverse the jaws, how large of a diameter can you turn on your lathe without using a face plate? Of course, I'm thinking of cannon chamber size here, hehe.

JSR let me know if you want me to make you some drawings. It would be fun to help you with one of your projects. Not that you need it or anything, but it would still be fun. The main benefit is you can see the assembly before machining it to make sure nothing interferes and everything fits together ...

That is a beautiful setup! Congrats JSR. That is fantastic. I bet you're going to have loads of fun.

The website looks great. I love the blueprint looking design on top that follows the mouse cursor.

Merry Christmas!

Got some practice with the welder by making a tool for the lathe. I've been needing a tool rest more suited towards the carbide tooling I use so I welded this together. The welds have really bad porosity but I believe that is because I was holding the gun at the wrong angle and I wasn't moving cons...

I must ask, what is everyone building with these days? Im sure Im not the only guy with PVC My first cannon was a propane combustion made from ABS plastic. That was about 12 years ago I think. Since then, I've used aluminum. I've only made 2 cannons in over 10 years because I used aluminum. It tend...