9/11: Speeds Reported For World Trade Center Attack Aircraft Analyzed

For Immediate Release

(PilotsFor911Truth.org) - Much controversy has surrounded the speeds reported for the World Trade Center attack aircraft. However, none of the arguments for either side of the debate have been properly based on actual data, until now. Pilots For 9/11 Truth have recently analyzed data provided by the National Transportation Safety Board in terms of a "Radar Data Impact Speed Study" in which the NTSB concludes 510 knots and 430 knots for United 175 (South Tower) and American 11 (North Tower), respectively. A benchmark has been set by the October 1999 crash of Egypt Air 990, a 767 which exceeded it's maximum operating limits causing in-flight structural failure, of which data is available to compare to the WTC Attack Aircraft.

Egypt Air 990 (EA990) is a 767 which was reported to have entered a dive and accelerated to a peak speed of .99 Mach at 22,000 feet. Boeing sets maximum operating speeds for the 767 as 360 Knots and .86 Mach. The reason for two airspeed limitations is due to air density at lower vs. higher altitudes. To understand equivalent dynamic pressures on an airframe of low vs. high altitude, there is an airspeed appropriately titled "Equivalent Airspeed" or EAS[1]. EAS is defined as the airspeed at sea level which produces the same dynamic pressure acting on the airframe as the true airspeed at high altitudes.[2]

Discussion here.

http://pilotsfor911truth.org/forum/index.php?showtopic=18300

[1] http://www.luizmonteiro.com/Altimetry.aspx...ivalentAirspeed, http://www.csgnetwork.com/machonecalc.html (Equivalent Airspeed and Mach One Calculator to convert Mach into True Airspeed based on altitude/temp and then into Equivalent Airspeed)
[2] http://www.aerospaceweb.org/question/instruments/q0251.shtml