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Det cord doesn't "burn", it detonates, hence the name, "detonating cord".
If you are referring to the propogation rate of the explosion of the det cord, since it is primarily RDX based, the rate should be in the 7,000 m/s range.
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You are correct. Det Cord burning is a myth. Once a burn reaches Supersonic it crosses the line from burn to bang.
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Originally Posted by theditchdoctor
I know you have a LOT more experience with the stuff than I ever will, but I believe it's actually something on the order of 8,700 m/s. At least that's what I was taught in an advanced HAZMAT course I took. However, that was the propagation rate for RDX itself in a confined space.....like I said, you're the expert here, but I would like to know which is correct just out of my own curiosity.
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A DC misconception is that it has the same explosive effect or RE factor as it's base explosive in solid block form. RDX/PTN are considerably weaker in their Granular form found in DC.