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

The official report by the National Transportation Safety Board (NTSB) relating to the two planes that crashed into WTC on September 11, 2001 shows that they were traveling at a speed of 945 km/h and 796 km/h respectively.Pilots for 9/11 Truth, an international organization of pilots and aviation professionals, has pointed out that, according to the manufacturer, the Boeing 767 develops structural failure and dismembers at a speed surpassing 660 km/h when flying at near sea level in thick air. 

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

(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]

Pilots For 9/11 Truth have calculated the Equivalent Airspeed for EA990 peak speed of .99 Mach at 22,000 feet as the equivalent dynamic effects of 425 knots at or near sea level. This airspeed is 65 knots over max operating for a 767, 85 knots less than the alleged United 175, and 5 knots less than the alleged American 11. Although it may be probable for the alleged American 11 to achieve such speed as 430 knots is only 5 knots over that of EA990 peak speed, It is impossible for the alleged United 175 to achieve the speeds reported by the NTSB using EA990 as a benchmark.

Pilots For 9/11 Truth have further studied if a 767 could continue controlled flight at such reported speeds. According to the NTSB, EA990 wreckage was found in two distinct debris fields, indicating in-flight structural failure which has been determined to have occurred a few seconds after recording peak speed. Based on EA990, it is impossible for the alleged United 175 to have continued controlled flight at more than 85 knots over the speed which failed the structure of EA990.

Full detailed analysis, including analysis of a recent simulator experiment performed, and interviews with United and American Airlines 757/767 Pilots can be viewed in the new presentation, "9/11: World Trade Center Attack" available only at http://pilotsfor911truth.org. Although other factors come into play within the transonic ranges, Dynamic pressure is dynamic pressure. Math doesn't lie. Boeing needs to release wind tunnel data for the Boeing 767. Despite the fact that the data can be fabricated, such a release of data may alert more pilots and engineers to the extremely excessive speeds reported near sea level for the Boeing 767 in which they can decide for themselves. Update: Since our article on WTC Aircraft Speed Analysis was written, more evidence has been gathered to reflect the research provided by Pilots For 9/11 Truth and in the film "9/11: World Trade Center Attack". A more thorough understanding and explanation of why V speeds are established based on wind tunnel tests performed by the manufacturer is also available virtually making the need to gather documents from Boeing based on wind tunnel testing, moot. We already have their results of such tests in the form of the V Speeds they have established through wind tunnel testing required by definition as outlined in the Illustrated Guide To Aerodynamics and all other related text. For more information and to review the evidence gathered:

Evidence Strengthens To Support WTC Aircraft Speed Analysis

(PilotsFor911Truth.org) - Since our article on WTC Aircraft Speed Analysis was written, more evidence has been gathered to reflect the research provided by Pilots For 9/11 Truth and in the film "9/11: World Trade Center Attack". A more thorough understanding and explanation of why V speeds are established based on wind tunnel tests performed by the manufacturer is also available virtually making the need to gather documents from Boeing based on wind tunnel testing, moot. We already have their results of such tests in the form of the V Speeds they have established through wind tunnel testing required by definition as outlined in the Illustrated Guide To Aerodynamics and all other related text.

The Argument - Reported speeds/control -
"impossible" 
"improbable",
"The Elephant In The Room" - 

The Evidence

Data - 
NTSB

Boeing - Boeing spokeswoman Leslie Hazzard in this recording saying 500+ mph at 700 feet is impossible.

(Interviewer asks -) "So there's no way the aircraft could be going 500 mph at [700 ft] altitude then?"
Boeing Spokesperson - (Laughs) "Not a chance..."

Limits set by the
manufacturer based on flight/wind tunnel testing 



The above is for a 767, reduce the speeds by 10 knots for a 757.

The speeds are based on the weight ranges in the A1NM Type Certificate data sheet which also give an altitude range. 

VD = 420 KCAS to 17,854 ft/.91M above 23,000 ft, linear variation between these points.

The above diagram is good from sea level, up to almost 18,000 feet. Above that, the Vg diagram moves to the left. In other words, structural failure speeds are less in terms of Indicated at higher altitudes. Real pilots can see this as they climb. The Vmo indicator (Barber pole) actually moves to a lower airspeed once you climb above the crossover altitude. The reason for this is the aircraft is no longer limited by raw dynamic pressure, rather it is now becoming limited by the effects of Mach (both drag related, which is why EAS is calculated using Mach number and good to above Mach 2). A good explanation of this is shown here.

http://www.biggles-software.com/software/7..._40_vmo_mmo.htm

NASA Research 

Precedent - 

EA990 - 
China Air 747SP 
TWA 727 
Simulator Reconstruction
Modified DC-8 

All suffered in flight structural failure, crash and/or lost control and needed 10's of thousand of feet to recover, well below Vmo+150.... or was modified to exceed it's manufacturer's set limits in the case of the DC-8. 

Numerous verified experts - 

Captain Russ Wittenberg (ret)
30,000+ Total Flight Time
707, 727, 737, 747, 757, 767, 777, DC-8, L-1049, Learjet 24/25, L-188
Ground Instructor, Advanced Ground Instructor, Instrument Instructor, Flight Engineer Turbojet
Aircraft Dispatcher
Pan Am, United
United States Air Force (ret)
Over 100 Combat Missions Flown
Command time in:
- N591UA (Aircraft dispatched as United 93)
- N612UA (Aircraft dispatched as United 175)

Captain Ross Aimer
UAL Ret.
CEO, My Aviation Expert LLC
40 years and 30,000 hrs.
BS Aero
A&P Mech.
B-777/767/757/747/737/727/720/707, DC-10/-9/-8 Type ratings
Command time in:
- N591UA (Aircraft dispatched as United 93)
- N612UA (Aircraft dispatched as United 175)

Commander Ralph “Rotten” Kolstad
23,000 hours
27 years in the airlines
B757/767 for 13 years mostly international Captain with American Airlines.
20 years US Navy flying fighters off aircraft carriers, TopGun twice
civilian pilot flying gliders, light airplanes and warbirds
Command time in:
- N644AA (Aircraft dispatched as American 77)
- N334AA (Aircraft dispatched as American 11)

John Lear
Son of Bill Lear
(Founder, creator of the Lear Jet Corporation)
More than 40 years of Flying
19,000+ TT
23 Type ratings
Flight experience includes 707, DC-8, 727, L10-11

Jeff Latas
-Over 20 years in the USAF
--USAF Accident investigation Board President
--Flew the F-111, T38, and F-15E
--Combat experience in the F-15E includes Desert Storm and four tours of duty in Northern and Southern Watch
--Weapons Requirements Officer, USAF HQ, Pentagon
--Standard and Evaluations Flight Examiner, Command level
-Currently Captain for JetBlue Airways

Guy S. Razer, LtCol, USAF (Ret)
3,500+ Hours Total Flight Time
F-15E/C, F-111A/D/E/F/EF, F-16, F-18, B-1, Mig-29, SU-22, T-37/38, Various Cvilian Prop
Combat Time: Operation Northern Watch
USAF Fighter Weapons School Instructor
NATO Tactical Leadership Program Instructor/Mission Coordinator
USAF Material Command Weapons Development Test Pilot
Combat Support Coordination Team 2 Airpower Coordinator, South Korea
All Service Combat Identification Evaluation Team Operations Officer
Boeing F-22 Pilot Instructor
MS Aeronautical Studies, Embry-Riddle Aeronautical University

Dwain Deets
MS Physics, MS Eng
Former Director, Aerospace Projects, NASA Dryden Flight Research Center
Served as Director, Research Engineering Division at Dryden
Recipient of the NASA Exceptional Service Award
Presidential Meritorious Rank Award in the Senior Executive Service (1988)
Selected presenter of the Wright Brothers Lectureship in Aeronautics
Associate Fellow - American Institute of Aeronautics and Astronautics (AIAA)
Included in "Who's Who in Science and Engineering" 1993 - 2000
Former Chairman of the Aerospace Control and Guidance Systems
- Committee of the Society of Automotive Engineers
Former Member, AIAA Committee on Society and Aerospace Technology
37 year NASA career

Lt. Colonel Shelton F. Lankford
United States Marine Corps (ret)
A-4 Skyhawk, KC-130 (10,000+ Hours)
S-2, T-1, F9F, F-11, OV-10, T-2J
303 Combat Missions


Captain Paul A. Trood
B737-800/400 Captain
Qantas Airways
Australia
Experience: 18,000 flight hours

Jim Mustanich
ATP 20,000+ hours
Typed in CE-500, DHC-7, EMB-110, BA-3100
Aircraft flown include Boeing 727,737, Douglas DC-9, MD-80
United Air Lines, American International Airlines, Air Pacific Airlines, West Air Airlines
6-7 years corporate flying in Cessna Citations
Factory demo pilot for Cessna Citations

Ted Muga
Naval Aviator - Retired Commander, USNR
A/C experience - Grumman E-1 and E-2 ( Approx, 3800 hours )
Pan American World Airways - Retired Dec. 1991 ( that's when PanAM went bankrupt )
Flight Engineer/First Officer -- Boeing 707 & Boeing 727 ( approx. 7500 hours )

Col Robert Bowman
President of the Institute for Space and Security Studies
Executive Vice President of Millennium III Corporation
retired Presiding Archbishop of the United Catholic Church
101 combat missions in Vietnam
directed all the “Star Wars” programs under Presidents Ford and Carter
recipient of the Eisenhower Medal
George F. Kennan Peace Prize
President’s Medal of Veterans for Peace
Society of Military Engineers' ROTC Award of Merit (twice)
Six Air Medals
Ph.D. is in Aeronautics and Nuclear Engineering from Caltech
chaired 8 major international conferences
one of the country’s foremost experts on National Security
independent candidate for President of the US in 2000
http://thepatriots.us

John Panarelli
friend and fellow aviator of John Ogonowski - Capt. AA #11
ATP: L-300, B-737, DC-10, DC-8, FE, TT=approx. 11,000 hours
USAF-C141-IP, Eastern Metro, Braniff, Ryan International, Emery
Worldwide, Polar Air Cargo

More listed here - http://pilotsfor911truth.org/core


Evidence for those who make excuse for the government story - 

Opinion
"Because the govt told me so"
Aircraft Forensic Evidence - N/A

For those who make excuses for the government story - 

Please let us know when you find one verified pilot (or precedent) willing to support your claims that a standard Boeing 767 can maintain control and stability at Vmo+150, Va+220 --and pull G's-- out of a 10,000+ foot dive, while rolling on G's cranking into a 38 degree bank, to hit a target with less than a 25' margin for error - for a pilot with less experience than one who couldn't control a 172 at 65 knots. Please let us also know when you have any type of evidence for your argument other than opinion or "Because the govt told me so...". 

Founded in August 2006, Pilots For 9/11 Truth is a growing organization of aviation professionals from around the globe. The organization has also analyzed Flight Data provided by the National Transportation Safety Board (NTSB) for the Pentagon Attack and the events in Shanksville, PA. The data does not support the government story. The NTSB/FBI refuse to comment. Pilots For 9/11 Truth do not offer theory or point blame at this point in time. However, there is a growing mountain of conflicting information and data in which government agencies and officials refuse to acknowledge. Pilots For 9/11 Truth Core member list continues to grow. The need for a new investigation has never been more apparent.