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Viewing Single Post From: 84 RADES data and speed of flight 77
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First of all, radar is not very accurate at low altitude. This is merely a guesstimate at best. No one should have a high degree of confidence in the numbers.

If you want someone to verify your math, you're very close.

I do it this way, it's simpler.

6619.681 / 11.915 = 555.57 fps

(555.57 * 60) * 60 = 2000052 fph
2000052 / 5280 = 378.79 MPH = 329.177 KTS

ETA: That's likely the speed when it was lost on radar and not the final speed, but I haven't plotted the coordinates to verify that. I doubt radar could track it all the way to the Pentagon.

Edit by JFK - cleaning up quotes because no one else is in this thread yet.
Edited by JFK, Jun 4 2008, 08:55 PM.
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84 RADES data and speed of flight 77 · American Flight 77