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"In the world of spuds today"

A place to ask general spud cannon related questions.
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Unread postAuthor: DYI » Tue Sep 13, 2011 10:10 am

ITWOST, my summer project is finally posted. I won't be building anything shooty for the next eight months, owing to university, but I'll hopefully get some simulations written in between class work.
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Unread postAuthor: Labtecpower » Tue Sep 13, 2011 2:07 pm

Trying my new ignition system, and the repaired barrel.

[youtube]http://www.youtube.com/watch?v=1Bo1f4e70Nw[/youtube]

I thank DYI for making this look pathetic :D
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Unread postAuthor: Gun Freak » Tue Sep 13, 2011 4:48 pm

Tested pengun today, turns out piston was too loose and it wouldn't pilot with the schrader alone. I took the core out and disconnected the pump after filling it and it will fire like that, but I don't like that. I heated the cylinder with a propane torch and the schrader slipped right out :) I'm worried the heating had an effect on the stainless steel chamber though. I quenched it and cleaned the epoxy off the inside of the chamber and the schrader and now I'm making a new piston.
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Unread postAuthor: jackssmirkingrevenge » Wed Sep 14, 2011 1:19 am

Labtecpower wrote:I thank DYI for making this look pathetic :D


Still looks impressive, good job :)
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Unread postAuthor: jhalek90 » Wed Sep 14, 2011 5:26 am

ITWOST, tested a dart, designed for penatration, and found that with HPA It was quite happy going through 12" of ballistics gel, and my steel toolbox...
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jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?

POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
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Unread postAuthor: Crna Legija » Wed Sep 14, 2011 6:15 am

Gun Freak wrote: I heated the cylinder with a propane torch and the schrader slipped right out :) I'm worried the heating had an effect on the stainless steel chamber though.


I wouldn't be too worried, i doubt you got it hot enough to weaken it permanently also the tube is proboly the last thing that will break when your using epoxy plugs :lol:
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Unread postAuthor: jackssmirkingrevenge » Wed Sep 14, 2011 6:41 am

jhalek90 wrote:through 12" of ballistics gel, and my steel toolbox...


Was that last one intentional :D
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Unread postAuthor: jhalek90 » Wed Sep 14, 2011 9:49 am

[quote="jackssmirkingrevenge"
Was that last one intentional :D[/quote]

Sadly no. :shock:

I made an assumption (Doh!) :oops: that a foot of ballistics gel would stop the round.... i guess a heavy stainless steel dart (1/4" diameter) traveling at high speeds is hard to stop.... haha

Also, the 300-350psi (aprox.) fast valve, and a 4' barrel did not help slow it down either.... lol
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jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?

POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
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Unread postAuthor: Gun Freak » Thu Sep 15, 2011 8:17 am

Dunno if this deserves it's own topic, you guys tell me :)
http://i979.photobucket.com/albums/ae277/lvspiano/86e3f6c2.mp4
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Unread postAuthor: Gippeto » Thu Sep 15, 2011 9:28 am

Sounds like thou hast the dreaded "tank ping"...better post it. :)
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Unread postAuthor: Gun Freak » Thu Sep 15, 2011 10:27 am

Tank ping? What the heck is that :P I'll post it later, I'm at school.
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Unread postAuthor: Gippeto » Thu Sep 15, 2011 11:26 am

Hmm...quieter in the shop this time...not tank ping, it's the initial hit on a can?

Tank ping is caused by a pressure wave within the reservoir of a pcp striking the end of the reservoir.

Check out Ted's Holdover on youtube...you'll hear it every time he shoots the EdGun. Might be a bit graphic...in the event that bothers you.
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Unread postAuthor: Gun Freak » Thu Sep 15, 2011 12:53 pm

I'm pretty sure it's the can, because it sounds ok when I shoot it at anything else or dry fire it.
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Unread postAuthor: SpudBlaster15 » Thu Sep 15, 2011 1:12 pm

ITWOSY, it has been exactly 4 years since I posted my UPHL-38 hybrid on Spudfiles.

ITWOST, I realized that Gun Freak doesn't know how to spell "acquire". :wink:
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Unread postAuthor: Gun Freak » Thu Sep 15, 2011 2:30 pm

In the world of spuds yesterday? :wink:
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