burn,
Ooh, that sounds like fun! Bring the hot dogs, it's a weenie roast! :o)
Why Copper
Mar 30, 2005
29 Replies
I'd rather roast a few trolls and assorted spammers, thank you!
Former professional electron wrangler.
Michael A. Terrell
Central Florida
You can see rails being welded at
That's a lot larger than the average CadWeld, but the same idea.
And about all you can do with thermite {or magnesium, for that matter..} fires is pour sand on them until they run out of steam. That's why first you are VERY sure there's nothing nearby that burns...
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known
burn,
bed/railcar!
That's sometimes why the firemen just let those scrap metal yard fires burn themselves out. More water can make more fire.
Some years ago, a guy I know took some training in fire-extinguishing protocols. One of the examples which came up in class was magnesium fires. There are specialized extinguishers which can be used on magnesium... they spray a finely divided powder which cakes on the surface of the burning metal and forms a barrier layer which excludes oxygen.
One of the sample questions in class was "What extinguishing protocol do you use to put out an engine-compartment fire in an old VW Beetle?"
The correct answer was reported to be "None. The cost of refilling a magnesium-blanketing extinguisher exceeds the value of the vehicle."
Dave Platt AE6EO
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Dave Platt wrote (in ) about 'Why Copper', on Fri, 15 Apr
2005:
My answer would be 'water', because then there would be less trash to clear away.
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
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Yeah, but the personnel and asphalt damage from the live-steam blowback might be prohibitive...
Dave Platt AE6EO
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Dave Platt wrote (in ) about 'Why Copper', on Fri, 15 Apr
2005:Oh, you'd have to stand well back, but it's a very 'green' solution - an example of the 'hydrogen economy'. (;-)
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
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Well, that's Class D, I think.
"Purple K" and "Ansul" powder are rated for Class D, but it takes a large quantity to do the job; sand is cheaper...
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Won't the magnesium take its oxygen from the sand (SiO2), and reduce it to silicon? Similar to the thermite reaction? In that case, it would continue to burn.
"Electricity is of two kinds, positive and negative. The difference
is, I presume, that one comes a little more expensive, but is more
durable; the other is a cheaper thing, but the moths get into it."
(Stephen Leacock)
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