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Guest Message by DevFuse

Interesting read


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3 replies to this topic

#1 jh grunt

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Posted 21 December 2006 - 11:13 AM

75% saltpeter
15% charcoal
10% sulfur
Once ignited, gunpowder burns at 2138 degrees centigrade.
In the simplest terms, the potassium nitrate reacts with carbon and sulfur to produce potassium sulfide, carbon dioxide gas, and nitrogen gas.
In reality, the reaction also produces other potassium compounds, carbon monoxide and traces of additional chemicals.
The solids make up 56% of the results of the combustion, showing up as smoke and deposits on the inside of the gun barrel.
The carbon dioxide, nitrogen and other gases constitute 44% of the products.
These gases, at normal pressure and temperature, occupy 280 times the volume of the original powder. At the heat of the reaction, they take up fully 3600 times as much space, generating a pressure of more than 20 tons per square inch in a closed vessel.
To get a sense of the scale of the expanding gas, imagine a yardstick representing the solid powder stretching almost instantly to a length of two miles, representing the amount of gas generated.
The key to the reaction is speed. A lump of charcoal, because it is all fuel, actually releases more energy on burning than does an equal amount of gunpowder, only a quarter of which is combustible.
The natural burning of charcoal, though, gives off its heat over a much longer period of time.
Gunpowder converts all its potential energy to hot, expanding gases in a few thousandths of a second.
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#2 Devereaux

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Posted 22 December 2006 - 11:12 PM

Well, you be talking explosives in general. There are no "explosions" in reality, just rapid burns. C4, that wonderful military material, burns normally when lit with a match, but burns at 27,000 fps when set off with a military cap. When you weave it into a form that appears for all the world like clothes line, it is called DetCord, and it, too, "burns" at 27,000 fps. Wrap a couple loops of that around a tree and you have no need for chainsaws; a 55 gal drum and you have yourself the makings of a two-holer; around a neck and you can act like an Islamofascist.
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#3 jh grunt

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Posted 26 December 2006 - 01:19 PM

We used to use C-4 to heat our C rats in Nam It was better than the thyroxine that was issued.
Grunt
"Freedom is not free . . . but the U.S. Marine Corps will pay most of your share."
Pacifism is a luxury paid for by warriors
Semper Fi

And on the seventh day before GOD rested,  He created a MARINE to keep him safe!!
                                 ( Who else would He trust?).

#4 dd

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Posted 26 December 2006 - 02:04 PM

View Postjh grunt, on Dec 21 2006, 11:13 AM, said:

75% saltpeter
15% charcoal
10% sulfur

Made some homemade stuff when I was a kid. Spontaneously ignited while I was mixing it. Never tried it again!

:oops:
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