Hi Spudders, Construction: This is my weed sprayer cannon! The most noticeable feature is that the chamber is made from a 1 gal. garden sprayer which is made from a thick polyethylene plastic. The threads on the tank were very different from 2" NPT but I cast them into the correct thread size using ...

Hi Spudders! I thought of a way to fuel/exhaust a combustion potato cannon is a simple way. I originally came up with the idea when I decided I wanted to build a cannon using a garden sprayer for a chamber like this one: https://i5.walmartimages.com/asr/c9022e18-8ed0-4247-bdb3-7f518fcdee69_1.5b4f6be...

I remember most the handle on Copperhead Prime made out of polymorph. The trouble is the low melting temperature. I wanted something that was more wood-like too. Hopefully it doesn't look like a turd when it's sanded. When mixing the sawdust into the wood glue it looked a lot like chicken salad. It ...

Update! So my plans to see my friends didn't pan out so I wasn't able to fire the cannon over the weekend :( Thanks! Yeah, I wanted to try this first hop-up design because it was very easy to make and doesn't require modifying the barrel itself. We'll see if it gets blown apart or not! From seeing o...

Thanks for the feedback! I don't have any data on the valve opening time no... THERE IT IS!!!! I was looking for that cannon for so long! I remember seeing that thing so long ago, and that's what inspired me to use a wye-strainer actually. I tried looking for that post, but couldn't find it. I loved...

All you got to do is wish as hard as you can and magic will do the rest! ~~~~~~~~~~~~~~~ Here's the experimental ammo I'm going to try in addition to spuds and gold balls. 1" couplings are a perfect fit for the barrel so I decided to take advantage of that. The one on the right is kinda similar to t...

Grrreat questions! Thanks! It took me 8 days to build this. I had lots of time because it was winter break from school. I used "Oatey No. 5 Lead Free Solder Paste" which is used for plumbing flux. I used silver bearing acid core solder "used for metal work" with it. In the future i'd recommend using...

a.JPG Hi Spudders! Abstract: I want to show you all my latest pneumatic cannon! Here's a brief overview. The valve is a piston type housed in a stainless 2" wye strainer fitting. The chamber is 2" sch40 stainless threaded pipe. The barrel is sch10 anodized aluminum pipe with 1.682" ID (golf balls!!...

Thank you! I think it would be better if you watched my disassembly/reassembly video to get a better idea of how everything works: [youtube]https://youtu.be/NLnPNv4jXMs[/youtube] I got a chance to test out my idea of adding a smoothbore extension to the rifled barrel. It wasn't as accurate as just t...

Hi spudders! I've got a question for you! I've got my new airgun I built here: http://www.spudfiles.com/pneumatic-cannon-database/topic26216.html and I have a 10.5" .45 cal rifled barrel inside it. I want to get some more length out of it to better utilize the air for each shot to increase velocity....

I think my shots in the woods yesterday were less powerful because the ammo I was using wasn't precise like the .535 cal round balls I was using before. But even if I did have nice lead bullets for it (which will happen soon so stay tuned), I would expect less projectile energy because there is less...

Wow I appreciate that a lot! So I made some changes to the gun... I received in the mail my 10.5" long 1 in 12" twist rifled long Colt barrel. Got it here: http://www.ebay.com/itm/45-Caliber-Rifled-Barrel-Stock-Material-Chambered-for-45-ACP-/111628797451 I made a bolt action mechanism using 1" PVC p...

Thank you for the positive feedback! Brian the Brain: When you say muffler do you mean a silencer? I've thought about making an integral one that permanently fixed to the upper receiver so I wouldn't need a license for it. We'll see how loud it is outside though. Which leads me too... mark.f: I have...

It's been a while! Hi all! I want to share my finished project with you all so I can get some feedback and to offer my creative contribution. At the heart of the gun is a scaled down Quick Dump Valve (QDV) which is Technician1002's design. Thank you! I chose this route because I wanted something sim...

I like it! It's cool to see the use of an unorthodox valve and I guess it works too! I'd be careful about mentioning tracer rounds because discussion of incendiary projectiles is prohibited. You can attach a glowstick to some ammo and that might work. Good luck with fixing all the little problems. T...