Yeah I'd just buy one of those things for sure.

300fps is at the upper end of hardcore nerf performance. That's awesome.

PVC vs ABS crush test


PVC air pressure failure


ABS air pressure failure


ABS wins.

That is really clean and very nice. I love that it's a hybrid. So awesome. Nice job!

Anatine Duo wrote: ↑

Mon Mar 07, 2022 11:44 am

How does your dog aim it?

Come on man. That's not what he meant and you know it. He said "tennis ball gun for my dog", so clearly what he's looking for is a gun made out of tennis balls that he will launch his dog from.

https://www.youtube.com/watch?v=KqstP9ics2A Great video. He tested hydro testing to failure with PVC and it has enough POP to hurt someone for sure. Not sure if there was air in the line behind the water, but an interesting result. Lots of cool PVC failure testing specifically with spud guns in mind.

Am present. I made a new cannon in 2019 I think it was, and it was quite a project. The site is very low in activity, the glory days of spudding seems to have been in the 90's and early 2000's. Spudding will always have a special place in my heart and I have two special cannons that I will either le...

I'd buy a high-end PCP airgun and swap the barrel with a smooth one for BBs and just use that. You can connect the gun to a large air tank.

That thing is cool! Never seen anything like it. Nice work.

I think the valve looks great. That looks like the kind of thing I would design myself and I like it. I haven't studied the valve closely, but it just looks good generally. I wonder how strong the plastic will be where those small screws are. The only real concern I have is you mentioned something g...

I'm pretty clueless about what you need. Maybe some more details about the cannon might help. There are some pneumatically minded guys around here who will likely chime in. The only thing I really know how to do is make a piston cannon. Sounds like you want to buy a valve, but I can't think of any p...

That is impressive. So compact yet powerful. Very well done!

I like the machine work you did. I love projects like this. I did the grease gun thing like mrfoo said, and it worked for me. I filled the cannon with water, then pumped grease in. I've read that you can modify the grease gun to pump water in, but all that did was leak for me. There's a way to do it...

Many interesting and good things have been said. I think it's all been covered. I'd just like to suggest maybe trying X-shaped o-rings. I tried them and love them. They are less picky about being squeezed too much and having too much friction while still sealing perfectly. They are made for sliding ...

Nice experiment! Now the OP can just focus on simplicity.