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Old technology meet Mr GB

A place to ask general spud cannon related questions.
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Old technology meet Mr GB

Unread postAuthor: Carlman » Tue Apr 22, 2008 12:41 am

hi all,

i felt the crave for some golf ball on print server action today :D

here is the HP Jetdirect 300x in all its glory
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here is my first pneumatic (unposted) with a 2" ball valve and being a total length of 8' ish
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here is damage after 100psi with a GB :D
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just shows you what a big ball valve can do doesnt it?, everything is pn18 that will hold pressure and the barrel is pn12, imagine this at 200psi with my new pump :twisted:
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Unread postAuthor: jrrdw » Tue Apr 22, 2008 7:15 am

I'm surprised it didn't go all the way though, maby those printed circuit boards are tougher then I think. How you holding the aim steady when you turn the ball valve open?
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Unread postAuthor: JDP12 » Tue Apr 22, 2008 7:16 am

haha that gun reminds me of my first, which moved 3 feet off target whenever you tried to open the ball valve... thankfully i have moved on since then
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Unread postAuthor: Carlman » Tue Apr 22, 2008 7:55 am

jrrdw wrote:I'm surprised it didn't go all the way though, maby those printed circuit boards are tougher then I think. How you holding the aim steady when you turn the ball valve open?


the back of it is metal, i do not know the thickness but quite hard
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Unread postAuthor: psycix » Tue Apr 22, 2008 10:15 am

If you are using a higher pressure AND a better valve (sprinkler) I think you can put it all the way trough.
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Unread postAuthor: Ragnarok » Tue Apr 22, 2008 4:00 pm

jrrdw wrote:I'm surprised it didn't go all the way though, maby those printed circuit boards are tougher then I think.

They are pretty hardy. I have a mate who once fired air rifles at them, and some of the pellets actually bounced back at him - not fast enough to be dangerous, but quite worrying nonetheless.

They're made of multiple integrated layers, and like composite tank armour does, it allows them to disperse energy quite well.

I did crack the one in the floppy drive I destroyed in the HEAL video through the blunt force of 300 ft-lb potato, but unfortunately, none of the projectiles I fired actually reached the circuit board to penetrate, being broken up by the layers of metal above it.
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Unread postAuthor: DYI » Tue Apr 22, 2008 4:10 pm

I've fired a 2" diameter hardwood dart completely through a computer case, circuit boards, hard drives, disk drives and all. And that was with the low pressure SCTBDC, so it can't be incredibly difficult.

Are you going to make some way to hold it more steadily, and spring load the ball valve?
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Unread postAuthor: Blitz » Tue Apr 22, 2008 6:50 pm

It's too bad you used a halfway decent print server, hope it was broke before you ensured it was broke. :)

DYI, how thick was the chassis shell/panels? (I am assuming it's sheet metal)
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Unread postAuthor: Carlman » Tue Apr 22, 2008 8:53 pm

Blitz wrote:It's too bad you used a halfway decent print server, hope it was broke before you ensured it was broke. :)

DYI, how thick was the chassis shell/panels? (I am assuming it's sheet metal)


i had no use for it and no1 wuould buy it off me lol
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Unread postAuthor: D_Hall » Tue Apr 22, 2008 8:58 pm

Depends on what you hit on a circuit board.

I've fired a .22 LR at a single unit on a board (an admittedly sizable capacitor) and been stunned to see the bullet be absorbed (ie, didn't come out the other side).
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