SpudFiles

Anytime you decrease a port size in the middle a pneumatic system, you create a choke point. It's best to match the port sizes or as close as you can.

Welcome to Spudfiles.

So it looks like my 20mmplus bores are now prohibited!!! What do I do... get them grandfathered and so non-transferable? Do I get a compensation for turning them in? All my pneumatics are firearms in Canada (over 500fps) and I think any combustion would be too (combustion = fire). Not happy with th...

:ugeek: How the heck do I start a new topic, I am lost, I may only log in from phone,. Can't remember the password.......... And they say I am a "Specialist 3".......don't know the password or email.... :ugeek: damn. As we salute in my country : " Sănătate" - be healthy.... https://www.spudfiles.co...

Put potato slugs through old kitchen appliances, that's always fun.

@JRRDW, could you explain what you mean by air getting around the projectile and slowing it down? What I had in mind was a barrel diameter that narrows by less than a millimeter, going from decently airtight, to requiring a few tamps with a ramrod to fully seat. If the projectile is air tight from ...

Okay heres a weird question that will probably be obvious in hindsight. I think it would make sense but lemme ask you guys: So obviously there is such a thing as too tight of a barrel for a given projectile. Unless you have a pretty massive air chamber, once you start having to hammer down a projec...

Potato Demon wrote: ↑

Thu Feb 20, 2020 3:07 pm

Nice! I haven’t logged on in quite a while and I love how the new design looks!

Welcome back!

I like this idea. I've yet to build a proper pneumatic. I actually like this idea a lot. It's simple yet has the benefit of the pump. When you say 2:1 you mean chamber to barrel ratio, correct? I would likely target a 200psi pressure for a pneumatic. I feel that should offer a reasonable and substa...

A spud cannon that pays it's own way! Once that happens I prefer a pneumatic barrel sealing piston valve 2" or smaller with built in air compressor. As for the rest of the build 2:1 rule of thumb works well. Add on's would be but not limited to built in magazine for easy loading and less of it. Int...

http://www.burntlatke.com/calc.html

Is this what you're looking for?

I have tried similar and it will always happen like that, there is too much air just to launch one BB, it will try to launch the next one or two at a reduced velocity, so they just roll down the barrel. If you want semi auto you need to block the magazine tube somehow between each shot, that's the ...

Look in the mirror, tell us. What do you see? Someone who possesses at least the very minimal level of computer knowledge required to understand that OP's choice of OS has little or no bearing on the massive performance penalty imposed by this site's header. Tell us jrrdw, which specific characteri...

Oh lord, nuff said... Really? You're really still clinging to that "my platform is better than your platform" bullshit? Grow up, man. I see now where things turned sour, I thought you was being sarcastic when you said you where using a "Hackintoshed". Which is why I replied as I did, I wasn't tryin...

@mrfoo

Naaaa, just personal preference.

@sb15

"Dunning-Kruger" Look in the mirror, tell us. What do you see?

Are you running a upgraded version of windows 10 from 8.1? Are you also the one who had troubles registering a .OXC file trying to install GGDT? Nah, ain't no Windows here. Hackintoshed X220 Thinkpad. Core i5 at 2.5GHz with 16 GB of RAM, enough to do hardcore development and simulation work, brough...