*Updated* 4" Piston Valve now mounted to FEAR

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
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Killjoy
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Thu Mar 17, 2011 7:51 pm

This is my final project for a class at Stanford, which is why I haven't posted on spudfiles in a while.
The video is of a 75PSI test with compressed air. The valve is designed for operation pressures of 1000psi and use on my hybrid cannon FEAR. Porting is 4" and the valve is all steel construction.

[youtube][/youtube]


I have a fluid dynamics final in an hour so better specifications and descriptions will come next week when I'm on spring break.

*Update*
The valve is now mounted to FEAR's combustion chamber. Connection is made by 4" DOM steel tube lobster backed to make a 90 degree elbow for improved flow. Testing is postponed until I return from Stanford as is patent process. I have better things to do then wait 38 months for one.

Image

Note on the photo: only three tie rods are present to hold valve together for picture. Testing will require all seven rods put into place after a thorough lubing of the piston.
Last edited by Killjoy on Fri Sep 09, 2011 2:53 am, edited 2 times in total.
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Crna Legija
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Thu Mar 17, 2011 8:49 pm

WOW!!! that was crazy.


edit: good luck on the test.
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ramses
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Thu Mar 17, 2011 9:19 pm

Epic! (message too short)
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Hotwired
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Thu Mar 17, 2011 9:38 pm

Self piloting?

Unbalanced spool valve working against a spring til it reaches X pressure and vents?


Also, scale doesn't quite come across in that video until you note how small the fridge compressor looks.
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Gaderelguitarist
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Thu Mar 17, 2011 9:48 pm

FEAR is a good name for a cannon to showcase this valve.
so many muchness
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Gippeto
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Thu Mar 17, 2011 10:26 pm

He He He that's F'n 8) !

Have a big SEG right now. :lol:
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mark.f
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Thu Mar 17, 2011 10:43 pm

Words cannon express how cool this is.

Some more pictures will work, though. :wink:
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MrCrowley
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Thu Mar 17, 2011 10:49 pm

Hotwired wrote:Self piloting?

Unbalanced spool valve working against a spring til it reaches X pressure and vents?
Yeah that's what i'm thinking though using an air spring like me and SB15's piston hybrids.

This thing is bloody amazing, cannot wait until you strap it to a cannon and get some 10x mixes through it :shock:
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jackssmirkingrevenge
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Thu Mar 17, 2011 11:19 pm

mark.f wrote:Words cannon express how cool this is.
Was that a horrible pun or a typo :D

Amazing stuff Killjoy, the scale of it is simply mind blowing and if just 75 psi sounds like a detonation, it's going to be terrific as a hybrid!
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mark.f
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Thu Mar 17, 2011 11:53 pm

Killjoy has probably steeled himself for inane replies at something so awe-inspiring, so I'm not particularly exhausted at the scale of my typo.
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Technician1002
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Thu Mar 17, 2011 11:57 pm

I am impressed. Hybrid or simply pneumatic, it will be very impressive. Do you have an application in mind such as rooster booster?
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JDP12
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Fri Mar 18, 2011 12:39 am

wow... truly impressive! nice job!
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LovableAirGuns
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Fri Mar 18, 2011 3:53 am

that was CRAZY! it will be so good on a cannon
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POLAND_SPUD
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Fri Mar 18, 2011 4:30 am

heh not bad :D

Has anyone else noticed a fridge compressor ? :wink:
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Gun Freak
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Fri Mar 18, 2011 8:43 am

NO air cylinders.. NO 3 way valves.... THIS IS HORRIBLE!
:lol: :lol:
Looks pretty sick man... can't wait to see it on something...
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