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Old 8th August 2007, 06:30 PM   #181
ktesibios
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Originally Posted by FatesWebb View Post
the jet fuel in the wtc at the very most could have reached 490 F so why was it over 1300 F a week later?
Originally Posted by FatesWebb View Post
the jet fuel, and or the other debris as you say could not have reached a maximum of 490 Degrees F which this is an over estimate. this is assuming that all of the reported fuel burned inside of 1 floor of the building.
As part of their testing of the fire dynamics software they proposed to use in modeling the fires in the WTC Towers, NIST built cube farms similar to those known to have been present in the towers, with partitions, desks, chairs, computers, filing cabinets and so on. They instrumented them so that they could measure the rate of heat output, the temperatures at different locations and different heights in the compartment, rate of mass loss (to determine fuel consumption) and other things. These measurements could be compared to the predictions made by an FDS model of the same experimental setup to assess the accuracy of the model. Then they set them on fire and measured all these parameters as functions of time. They did this repeatedly, changing some variables like jet fuel present/not present, cube farm trashed as by the plane impact (they call it "rubbleized")/not trashed, ignition source location... to find out what impact these had on the behavior of the fires.

You can read about these experiments in NIST NCSTAR 1-5 pp. 75-81 (129-135 in the pdf file) or if you want more detail, the entirety of NIST NCSTAR 1-5E is dedicated to these experiments.

So, if your regurgitated claim of a maximum temperature of 490F is correct, how is it that actual measured upper gas layer temperatures greater than 800C (1472F) for significant periods of time, and peak temperatures as high as 1000C (1832F) were repeatedly measured in these experiments?

Remember, these weren't computer simulations, they were real live set-it-on-fire-and-take-its-temperature tests. IMO, that trumps any conspiracist's bogus back-of-the-envelope ciphering you can find on the Web.
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