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by PCGUY
Fri Jan 03, 2020 2:34 am
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SpudFiles has entered 2020

As you may notice, quite a bit looks different! SpudFiles has now entered the modern era of technology. Please see yourself around and let me know of any questions or troubles you encounter. A few major items... -Previous [youtube] tags will be found left in posts, but videos will remain visible. Yo...
by PCGUY
Sun Jan 12, 2020 3:01 pm
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Re: Reputation system and the new layout

Excellent item to bring up! I received a PM about this too. One of the biggest pitfalls (in the past) with big upgrades to SpudFiles is that oftentimes the fun "spudbux" to "reputation" points vanish. These features are not native to the forum software, they were manually added in by me (and friendl...
by Moonbogg
Wed Jan 22, 2020 1:48 am
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Describe the ultimate potato cannon

Describe what you feel would be the ultimate potato cannon. Bore size, pneumatic or combustion, power class, features such as spud cutting and breach loading, ease of use should be very important as well, etc etc. Consider all you have seen and learned from this hobby over the years and use your min...
by Xamllew
Tue Mar 03, 2020 2:29 am
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Re: Short question topic

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 project...
by farcticox1
Sat Mar 07, 2020 6:04 pm
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Re: My first .177 pellet gun

I'm on a Nerf thing at the moment so converted it to Nerf Rival with a ball valve for loading and 3/4" copper barrel.
Nerf Rival.jpg
by Gun Freak
Sun Mar 22, 2020 6:52 pm
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Howdy Gents! Don't remember the last time I signed into the files and made a post. Honestly, I'm surprised I even remembered my pword :lol: Interested to see who all is still active on here from the old days! @PCGuy I like what you've done with the place! Anywho, I want to drop a quick thanks to eve...
by jackssmirkingrevenge
Mon Mar 23, 2020 9:20 pm
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Re: Can't download GGDT. You have?

Welcome to the forum! You can find them here, for a combustion spud gun you want HGDT:

viewtopic.php?p=387228#p387228
by jimmy101
Fri Apr 03, 2020 1:10 pm
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Re: Pnuematic Cannon Making Very Loud Noise....!

You can search these forums for "honking" for a number of posts about the problem.
There is also a brief page on the wiki at spud_wiki/index.php?title=Honking and spud_wiki/index.php?title=Sprinkler_valve_modification
by Moonbogg
Tue Jun 30, 2020 6:17 pm
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Re: Confused. Cylinder chamber to barrel ratio for compressed air.

If you have the same air volume and the chamber is 1/3 the volume, the pressure will increase by 3x.

https://www.omnicalculator.com/physics/boyles-law
by KannonKing
Sat Jul 04, 2020 12:08 pm
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Happy 4th to you all

Wishing you many sharp reports!
by jackssmirkingrevenge
Wed Nov 25, 2020 11:51 pm
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Re: Off Topic - is it illegal to draw a silencer in California?

Can you legally purchase this book in California? Or this one , or this ? If so, I doubt you could be prosecuted for simply drawing something. I mean you could also design a full auto assault rifle, but you wouldn't worry about being prosecuted for that. For reference and historical purposes only. V...
by PCGUY
Sun Jan 31, 2021 11:52 am
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Which side do we like the User Information on?

When viewing posts... the "default" is on the right, which is how it is right now. I had it on the left a few months ago, but did a software upgrade that moved it back to the right. There is a small amount of customization I must do to continue to keep it on the left and have that persist through fo...
by Luke31
Wed Mar 31, 2021 2:47 pm
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Pressure rating for Coaxial cannons

I was contemplating about making a coaxial type air cannon design but I had a thought about the pressure rating. We know that certain pipes has been factory tested to withstand a certain amount of pressure inside of it. But what if that pressure is being applied outside of it? That's basically what'...
by farcticox1
Sat Apr 03, 2021 1:03 pm
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Re: Pressure rating for Coaxial cannons

yes, PVC starts to decay as soon as it is made I read, UV is a real killer.
by Moonbogg
Thu Apr 01, 2021 10:25 am
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Re: Pressure rating for Coaxial cannons

See link with external pressure ratings for PVC. They call it "critical collapse" pressure ratings. You can compare the critical collapse rating with the internal pressure rating. Critical collapse ratings: https://www.usplastic.com/knowledgebase/article.aspx?contentkey=777 Compare those figures to ...