Definitive calculations on United Airlines Flight 175 average speed for the final 52 miles are:
52 miles in 270 seconds = 693,2 mph
Speed of Sound (Match 1) at 25.000 feet is actually 692,8 mph.
Then, an average speed of 693,2 mph on a descent from 25.000 feet to below 1.000 feet, covering a distance of 52 miles directly towards target in just over 4.5 minutes, represents a totally IMPOSSIBLE achievement for a mid-size wide-body twinjet airliner.
ANOTHER FIRST TIME IN HISTORY involving a 911 Event:
A Boeing 767-200 averaged the SPEED OF SOUND during all and each of this 4.5 minutes and didn´t DESINTEGRATED in the Process...
Flight UA 175: An Incredible Journey
In August 2006 the NTSB, in response to a NSA FOI request, finally released details of the 9/11 flights.
http://www.ntsb.gov/Info/foia_fri.htm...
The report includes a flight profile, a ground track, A pressure altitude graph derived from radar mode C returns, and a transcript of radio communications.
The following is a "blow by blow" of the alleged plane's astonishing flight, taken from the report:
United Airlines Flight 175 departed Boston Logan at 8:14AM
It reached 31,000 feet at 8:33AM
The final radio transmission was at 8:42AM
Beacon Codes were changed twice within one minute at 8:47AM
UA 175 started into a climbing turn to the South East at 8:51AM
It reached 33,500 feet at 8:53AM
UA 175 began its descent while continuing its turn
It turned towards North East while its descent continued
The "plane" was now headed towards WTC2 in a direction of North east (45 degrees)
at what is termed point (G)
Its altitude at this point was 25,000 feet at 8:58 AM
It was at 24,000 feet at 8:59AM
18,500 feet at 9:00AM
15,000 feet at 9:01AM
9,000 feet at 9:02AM
The "plane" is presumed to have struck its target at a height under 1000 feet at 9:02 40 AM. Mission Accomplished.
This is incredible target acquisitioning, but just as incredible is the fact that according to the NTSB report, which was founded on three sets of radar data ( FAA, JFK Approach and USAF) the alleged plane covered the sixty mile distance in approximately 4 minutes and 40 seconds. That works out to an average of 700 mph; this is above Mach 1!, a totally impossible achievement, on multiple levels, for a mid-size narrow-body twinjet airliner.
http://www.ntsb.gov/info/ATC%20_Repor...
http://www.ntsb.gov/info/Flight_%20Pa...