Cooking up a little something...

Harness the power of precision mixtures of pressurized flammable vapor. Safety first! These are advanced potato guns - not for the beginner.
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mark.f
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Mon Jul 01, 2019 10:19 am

Hey, nice fucking work Moonbogg! I don't think I've seen a cannon from you since your photobucket/tinypic/whatever it was stopped working. :D How much easier was this build without using only hand tools like for the Striker?
Moonbogg wrote:I'm going back to try out my new bike pump, so I'll find an old board or something and shoot the thing with a can of soda. Also, I had to set my iphone in a coffee mug to hold it up since I don't have a tripod and don't make videos normally, so I suck balls at the whole youtube thing.
Those tiny ones with the flexible legs made out of lubricant hose for machine tools are nice enough to throw on the outside of a backpack, plus there are a number of things you can mount on them like antennas/mirrors/etc.

Good to hear from you again, I'll be free in less than a month to start building stuff again, hopefully I'll still be sticking around.
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Moonbogg
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Tue Jul 02, 2019 12:46 am

Thanks Mark! This cannon would obviously be pretty impossible to make with a drill press and hand tools, which is also the reason why the Striker looked cool but totally sucked in terms of function. Even so, this cannon took a ton of hard work and effort. It took a lot of aggressive sanding, buffing and honing because not everything was machined.
I left the ID’s of the brackets in the water jet condition and the barrels weren’t machined. Machining all those surfaces would have made the fit and finish easier and nicer, but could have also nearly doubled the cost of the cannon, so some sacrifices had to be made and then compensated for with ball busting grunt work in the form of sanding and honing. Maybe my next cannon I’ll be able to implement the lessons learned and machine everything for a super nice fit and finish with anodize and everything. In fact that’s how the next cannon is likely to be: an accumulation of all lessons learned from all my previous cannons in a no compromise implementation. There’s always room for improvement.
I’m already thinking of ways to improve the next one and have ideas for what to do. All in all this last one ended up being pretty special.
I hope you get around to making something to share with us. This is a great hobby for many reasons and sharing our work counts for a great deal of those reasons.
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Moonbogg
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Tue Jun 02, 2020 10:00 pm

Final update. After putting hundreds of shots through this cannon I can declare it a complete success, for now. There are no compromises to speak of. I'll report again in some number of years on its long-term reliability. The piston works reliably and as intended. The performance of the cannon is better than expected. This is a solid 4X cannon. Best recorded velocities:

12oz can of soda: 379fps
Lime: 849fps
Golf ball: 1067fps
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