Deciphering your posts is getting easier. I must be learning tmd-ish.
You've been 'doing' that landfill fire though?
So the WTC rubble would have nearly twice the thickness of insulation. The WTC rubble was also not strictly a 'pile' as it existed in a basement several storeys deep rather than as a 'pile' on the surface. This would add to the insulation effects, obviously.
You realize that multiplying temperatures is really horrible physics?
Simple example. Is 64 deg F double the temperature of 32 degrees? What about if you convert that to Celcius?
See above. Did not the fact that your numbers come just short of the boiling point of tungsten carbide ring any alarm bells about perhaps some errors.
Hell, carbon would be sublimating at that temperature.
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I do not recall making much a deal about the different fuel sources though I know I did mention what they would be. I did however, several times, make quite a bit of mention about the much greater insulation and the underground air supply as well as the scale of the rubble volume as having a big effect on the probability of combustion conditions.