SpudFiles

This is my second cannon actually submitted to the site, however it is one of many that I have built. It is a coaxial piston cannon with a 2'' chamber and 1/2'' barrel and seals like a dream using a 1.5'' end cap and a spring. I will soon post pictures of the inside because I machined the barrel stabilizer and I am proud of it lol. The pilot valve is a 1'' sprinkler valve thats modded and I will soon be putting two handles on it made out of 2'' tees and dropping a hose down from the sprinkler valve so i can put the blowgun on one of the handles. I would eventually love to get some regulated co2 onboard this baby but dont have enough money . I have only taken it up to 80 psi and it does not leak one bit and I have only shot AA batteries because I cant think or find any other ammo right now. Let me know what you think and please please make any suggestions. And the video is also pretty cool. Questions welcome!



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I like the co-ax!

Lot's of differential to open the piston quickly, and lots of pilot valve flow to avoid recompression.

Personally, I'd ditch the spring, you don't need it.

But hey, it seems to work well, and if you're happy with it, why would you care what I think?

Good job!

Nice clean cannon, I haven't seen a coaxial thats filled from the chamber side before. So what's with the video anyways, 1:10 of you lighting something on fire, then 2 minutes of slow motion burning......what did you even shoot at?

Atlantis wrote:So what's with the video anyways, 1:10 of you lighting something on fire, then 2 minutes of slow motion burning......what did you even shoot at?

It's written in the video, a jar full of gasoline. Though I agree, half naked youngsters in slow motion are of considerably less interest to the majority of this forum than explosions, I would have edited the first bit out personally.

As to the cannon, good job, and more damage!

Ah didn't notice it in the corner in tiny front combined with red/green colorblindness, way to look out for the viewer. Try cutting open a can of Sterno, lighting that and shooting it, I wonder if you'll get a more "jet" like flame following the projectile. You should add a scope and use it for Nerf darts, just don'y hurt anyone.

P.S. Clothes are great protection against burns.

Nice cannon I'm not usually a fan of co ax's. How about a better damage video. Shooting a glass jar doesn't show much. It's like demonstrating the force of a missile by shooting through paper. Perhaps some plywood.

BTW
Whats up with the whole video in slo mo. you should just get the shot next time.

And, since it's apparently a fetish of mine, nice foot

Atlantis wrote:Nice clean cannon, I haven't seen a coaxial thats filled from the chamber side before. So what's with the video anyways, 1:10 of you lighting something on fire, then 2 minutes of slow motion burning......what did you even shoot at?

Watch the video it explains everything...

okay okay okay sorry everyone about the video... I just got a new cell phone that records at 120 frames per second so i decided to test it out. And yes that is me with my shirt off who cares lol.... ever been to a pool in your lives? Haha anyways thanks for the positives...

I think its really nice and has awsome power you should go to 150 depending on the pressure rating on your sprinkler valve.

im starting to see more people use a sprinkler valve as a pilot. i think the first one i saw was that mini piston gun v2