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| Pyro Ninja |
 Posted: 05/13/2008 2:10 AM Post subject: |
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Captain
Joined: 09 Oct 2006
Posts: 328
181.18 Spud Bux
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Very nice, Love the power, expecially for such a short(ish) barrel  |
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| VH_man |
| Posted: 05/13/2008 5:40 AM Post subject: |
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Major General
Joined: 09 Dec 2006
Posts: 1384
2077.27 Spud Bux
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you do realize supersonic golfballs have the same muzzle energy as some anti-aircraft rounds.................
anyway, im proboably going to build a gun off of your "meter" design. i like it alot.
and that 20X mix......... HOLY F*** that was insane........... you did need a thicker burst disk though. |
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| psycix |
| Posted: 05/13/2008 6:39 AM Post subject: |
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Major General
Joined: 25 Jun 2007
Posts: 1698
134.02 Spud Bux
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Ah you finally posted it DYI
Its as impressive as I expected.
Will more vids come?
Exact muzzle velocities?  |
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| ilovetoblowthingsup |
| Posted: 05/13/2008 7:21 AM Post subject: |
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The Suppressor Man
Joined: 30 Mar 2007
Posts: 912
491.99 Spud Bux
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| wow... that thing is sick and awesome, nice job DYI |
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| POLAND_SPUD |
| Posted: 05/13/2008 8:36 AM Post subject: |
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Brigadier General
Joined: 13 Oct 2007
Posts: 911
2283.73 Spud Bux
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this is madness
BTW we have to make Larda to pressure test some standard iron fittings to get the rough idea about their 'real' pressure rating  |
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| pat123 |
| Posted: 05/13/2008 8:53 AM Post subject: |
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Lieutenant Colonel
Joined: 23 Dec 2006
Posts: 475
103.26 Spud Bux
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wow amazing  . taking those fittings to 20x  I am surprised that they stood up to that. I am definitely going to have to upgrade Biohazard. |
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| bigbob12345 |
| Posted: 05/13/2008 9:36 AM Post subject: |
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Experienced n00b
Joined: 01 Dec 2007
Posts: 1516
370.57 Spud Bux
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Wow I just realized those were malleable iron fittings, I didn't read through at first and assumed they were special high pressure ones.
Im very surprised that they held at 20x, Im also surprised that ddt didn't occur.
Well DYI, You really like to push the limits.
I thought using 500psi on the sctbdc was pushing the fittings but this is something else.
Nice job, I guess |
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| Ragnarok |
| Posted: 05/13/2008 14:53 PM Post subject: |
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Lord of Karma
Joined: 19 Dec 2006
Posts: 2244
5864.44 Spud Bux
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| POLAND_SPUD wrote: | | this is madness |
No. THIS IS SPUDFILES!!!
*Kicks Poland spud into conveniently positioned hole*
Very impressive DYI... If 20x oxy-propane doesn't detonate in 7 chamber diameters, we need a rethink of our detonation theories, although we should still be wary. |
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| daberno123 |
| Posted: 05/13/2008 15:38 PM Post subject: |
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Major
Joined: 19 Nov 2007
Posts: 377
610.06 Spud Bux
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It didn't blow-up, which is great, especially for Kevin, who doesn't have to give you his PS2
That really surprised me that it didn't blow up because of a detonation, which would have seemed inevitable at these mixes. Seems the usual assumptions have been proved wrong.
This doesn't mean everyone should start putting 20x into their hybrids though, and just because this gun survived it doesn't mean everyone who tries it won't be killed.
Still, that was awesome, but not the safest thing to do  |
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| paaiyan |
| Posted: 05/13/2008 15:50 PM Post subject: |
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Ascendant Defenestrator
Joined: 27 Dec 2006
Posts: 2055
2622.52 Spud Bux
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Wwwooowww.
Me likey. I want to see what that thing could do to a block of ballistics gelatin. |
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| pat123 |
| Posted: 05/13/2008 15:52 PM Post subject: |
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Lieutenant Colonel
Joined: 23 Dec 2006
Posts: 475
103.26 Spud Bux
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| yeah we need more damage pics. try shooting through 1" steel |
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| drex |
| Posted: 05/13/2008 16:03 PM Post subject: |
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Staff Sergeant
Joined: 21 Apr 2008
Posts: 103
139.50 Spud Bux
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| umm......... WOW. shoot some thing other than water plz. other than that awsomesweetsexycool |
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| DYI |
| Posted: 05/13/2008 16:36 PM Post subject: |
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Rear Brigadier
Joined: 07 Jul 2007
Posts: 2262
1007.18 Spud Bux
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I got the epoxy to rebuild the sparkplug, and I did a bit of a redesign to (hopefully) prevent the problem of the entire guts of the sparkplug getting pushed out. The next one will have copper conductors. A 3000 psi rated forged steel union left Georgia on the way to Ontario last night, and hopefully a high pressure rated chamber is in the works as well.
The problem with shooting holes in thick steel is that you need harder steel to do it. I don't have the equipment yet to harden it myself, so I need to buy it. Where I live, that means center punches, which, at $8 a piece, aren't very affordable ammo. I'll try my luck against 1/4" plate with unhardened ammo, but I wouldn't get too excited about it, as this thing doesn't have much more muzzle energy than the SCTBDC did (although at a quarter the weight and a third the length, I think it's a pretty good trade-off).
I've got to work this weekend, but I'll try to take it out and get some shots on Monday. I can't really promise anything, and you have to remember that, at these pressures, I can never count on it surviving the shot. |
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| clide |
| Posted: 05/13/2008 17:19 PM Post subject: |
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Donating Member
Joined: 06 Mar 2005
Posts: 716
2065.66 Spud Bux
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Did you happen to measure the pipe and fittings before and after the shots to check for plastic deformation?
Impressive gun although I must say a little bit insane. It's a bit of a shame that the 20x was just shot into the water. |
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| DYI |
| Posted: 05/13/2008 17:39 PM Post subject: |
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Rear Brigadier
Joined: 07 Jul 2007
Posts: 2262
1007.18 Spud Bux
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There's a story behind the different position of the last shot that I'm not going to get into here, but the water was the best target we could find in the nearby area where we could still run the wires behind something sturdy.
As the look of the GHETTOPOD might tell you, this testing wasn't exactly done in a highly planned and controlled manner, so no, there aren't any measurements |
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