SCTBDCv1.5 - 450psi 50mm steel cannon (updated with new vid)

[jackssmirkingrevenge]

Nah, I just wake up too bloody early in the morning

[origin unknown]

All I can say is WOW
Is this currently the most powerful (talking about ft/lbs here) pneumatic gun residing on spudfiles?

[DYI]

Is this currently the most powerful (talking about ft/lbs here) pneumatic gun residing on spudfiles?

Nope. SWAT, and _Fnord's Big Ghetto Pneumatic are both significantly more powerful. As far as power:weight ratio though, I may be leading due to the high pressure and ridiculously fast valve. Built on the same scale as the SWAT, it could propel a 6 pound projectile at 600 fps, far more energy than anything other than, possibly, FEAR. I've already got more than enough power for my rather small backyard.

[nivekatoz]

You should try to shoot stuff at least 20 to 30 feet away, Minimum......Than see what kind of damage you have..... :salute:

[DYI]

I don't exactly have 20 - 30' of range in my backyard. And lugging the whole thing down to the range isn't my idea of a good day. I probably will in the spring though.

[Fnord]

Nope. SWAT, and _Fnord's Big Ghetto Pneumatic are both significantly more powerful.

Well, I can't get much more than 3000 ft-lbs due to the low pressures and bulk of the thing. If I doubled the barrel length (which I could do, if I really wanted to...) I could be getting between 4000-5000 ft-lbs, but I really don't feel like putting it together again.

But remember, the mauler shot for about 3k, and it was hand-held. I'm still hoping to get a metal version of the mauler built next summer, but I need to get some 3" pipe first.

[DYI]

The 3k ft/lbs figure is for a very light projectile. For projectiles of a more useful mass (~2 pounds) in the new 3" bore barrel, with the planned chamber volume upgrade (90 more ci), I will be getting more like 7kft/lbs. I somehow doubt the figures for the Mauler. Even with the heated gases and wide bore barrel, I can't believe that it had the necessary acceleration forces with <kpsi combustion pressures, especially since the SCTBDC uses more pressure than almost all PVC hybrids produce, and needs a 12' barrel to achieve the same thing.

[SpudBlaster15]

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[MrCrowley]

A house door with a 2lb slug

I hope your talking about a solid door and not a cheap hollow one.

I've got one under my house come to think of it

Very nice launcher, lucky you have room to house one that big.

[DYI]

Oh, I'm still planning on shooting the door. As mentioned in the " What would you like to see annihilated" thread, I won't be making the full video until the spring, when the barrel isn't as brittle and my hands aren't as cold. I actually have 2 1kg Pykrete 3" slugs, as well as a 1.5kg slug composed of an old disposable oxygen cylinder filled with ice.

[mauritstheman]

way to hard damn hard pro but ft/lbag omfg that nice woot woot

[Fnord]

way to hard damn hard pro but ft/lbag omfg that nice woot woot

What the hell? It's like somebody put some instant messenger chat in a blender, then crapped on it and fed it to a shark.

[VH_man]

Translation:::

Wayyyy too hard for me to build, VERY professional. that amount of ft/lbs of muzzle energy is CRAZYYYY!!!!! nice cannon. Woot Woot.

im very skilled in the deciphering of bad english.....

[Ragnarok]

way to hard damn hard pro but ft/lbag omfg that nice woot woot

What the hell? It's like somebody put some instant messenger chat in a blender, then crapped on it and fed it to a shark.

As VH_man has since typed, that makes sense to me.

But still, come on here, mauritstheman, we've seen you can post decently, what gives here?

[DYI]

Updated original post with new damage video (SB15, this is for you).