Originally posted by 911files
This really is a waste of time, since turbo likes to duck the data and its trends and assert specifications instead. Fact, PA is given as between
42-44 when the plane is on the ground at Dulles. Fact, the elevation of Dulles ranges from 270 to 290. Corrected (according to P4T) for local
pressure, the PA is 342-344 feet under ideal circumstances (stationary). And this is for the take-off of AAL77.
Looking at PA on the ground at Dulles at the end of Flight #11 (as recorded in the FDR), the altitude is 120 - 121 feet! Now which is it turbo? Is the
altitude at landing correct, or is it the PA at take-off?
So yes, I repeat, PA is highly inaccurate for these purposes. Or at least I call a difference of 80 feet a significant difference.
Wow, more stars from your "friends" and nobody picked up on your errors?
I love it how you think you've got something here, and wave it around
as some sort of proof that you know what you're talking about. I'm surprised
ReHeat and WeedWacker did not pick up no these mistakes? Perhaps
they didn't want to burst your bubble, or perhaps they are not pilots?
#1. YOu need to stop using Google Earth to figure your elevations. Try
using Airport Data, or some more accurate info about Airport landscapes
and runway info.
Here's a start:
www.airnav.com...
#2. I have not seen/studied the data from flight #11 in this file, so
please produce it or just forget about debating it. You haven't supplied
the supporting parameters to show what the PA setting was during landing,
nor have you supplied the weather/atmospheric conditions for that flight
upon landing!
#3. Here is a tear down of your perceived "red flag":
pilotsfor911truth.org...
John, you need to hang out real aviation pros and stop assuming that you
know anything about aviation/aircraft flight and/or interpretting FDR data.
FACT: Pressure Altitude is accurate to within 20 feet below 1000 feet.
FAA regulation and manufacturer data agree. Your assumptions mean nothing
and have been proven incorrect as shown above.