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Discussion Starter #1 (Edited)
benEzra on THR posted this today - thought I'd bring it over here - has to be seen to be believed I think :smile: Just wish it had been me getting it to such a condition!

benEzra said:
Many years ago, someone gave my dad a print of a GE promo photo taken of a GE minigun with the barrels glowing after a 3000-round burst. Written on the back of the photo is "25mm" and "3600 rpm".



Changed that - put pick on one of my servers so hope it'll display now - plus downsized it some.
 

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Looks mighty toasty. :biggrin:
 

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That is unbelieveable!!!! :eek: But, of course I do believe it.
 

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Tell Me

Tell Me Those Barrels Are GLOWING RED HOT? :eek:
Great Photo Chris!
 

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the military has all the cool toys...

i want one...but i'm having enough time scrounging the money to keep my pistols fed (at least as often as I would like...)

--Jim
 

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I have seen a .50 mounted on an M60A1 that reached about the color of the tips, maybe a bit darker. But in night firing on a Ft Hood tank range, in the dark, you could see the glow pretty nicely.....
 

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Discussion Starter #8
Here is the gun after one hour in a blast chiller - all ready for another 3000 rounds! :silly:


 

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Meanwhile

Just Curious......
What the heck sort of special steel are they using for those gun barrels???
BECAUSE...Steel usually anneals itself (AKA gets dead soft) when it gets RED HOT & would it then not be TOO SOFT to still be a workable barrel? :confused:
 

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Discussion Starter #10
I am a bit out of touch re my metallurgy these days - (cerebral corrosion it's called) - but IIRC the barrel steel is not heat treated to a hardness in the first place. There is a category of steels emminently suitable for this job - I cannot remember the exact composition.

The material must however be tough and the alloy chosen will, be still fairly high carbon, but be able to withstand great fluctuations in temperature without any annealing effect.

That said - if those red hot tubes where water or oil quenched then I think we'll have trouble! Cooling however by natural (slow) radiation to atmosphere will allow the resumption of normal characteristics once more.

Well, within reason! :smile:
 

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Most steel starts annealing at the 400-500 range.

Red starts happening around the 1200 temps.

Those barrels are a type of manganese steel which holds its toughness at the red hot stages.

Tool bits have an addition of manganese which allows them to cut while have red hot cutting edges.

Even so...

get the barrel red hot through extended firing and the rifling anf throat starts eroding real quick...thats the reason that most machines guns have quick change barrels....
 

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Discussion Starter #13
Let's say 30 secs at 6000 RPM - tho if a ''mere'' 4000 - still be 45 seconds.

I keep thinking - ''hmmm - one round of 7.62 at say 20c - that lil' excercize cost 600 bucks!!!
 

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amazing pic. GREAT job on finding it Chris! The Minnis get VERY warm after they run a couple thousand rounds.........
 

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Discussion Starter #17
Marshmallows??? Shucks dude - they all got cremated by the muzzle blast!! :biggrin:
 

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scratchy wilson said:
How long would it take that thing to whip through 3000? Can't imagine it'd take that long...

I think the 30mm Vulcan is rated at nearlty 3000 rnds per minute.


@5mm? Anyone know if they are actually being used? Found some casings on the NG range a few years ago , but wasn't sure if it was just testing or standard armament. If ya can , watch the A10's fire a 30mm sometime. Way too cool!
 

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Discussion Starter #19 (Edited)
If ya can , watch the A10's fire a 30mm sometime. Way too cool!
This Rocky is a good example - awesome tool!!

Hmmm - seems an AVI won't cut it - gonna convert to WMV and try again shortly.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Let's try again - seems Ok - Randy - can you add ''AVI'' to file extensions for upload - could be useful now and again.
 

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I'd like a job

That's an awsome picture. I'm amazed that those barrels are OK after such heat. A tribute to good metallurgy. I sure wish I could get a job shooting that thing. I'd work cheap if they're interested.
 
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