hi doma,
so you are arguing with the pilots and simulators now that they don't say what you told me they do? they only are authoritative if they support your belief in conspiracies?
here's the relevant series of quotes:
"2. A Boeing 767-200 airframe is rated to .86 of Mach speed (speed of sound) at any altitude before the risk of structural failure. It as the aircraft approaches the speed of sound when the properties extreme high and low pressure areas can have destructive effects on the airframe. This figure is as with all limits set conservatively.
3. The speed of sound at approximate sea level is 761 mph on a standard day. Therefore the theoretical maximum speed the 767-200 can reach intact is, conservatively, .86 x 761mph = 654mph or approximately 100mph above the officially reported speed of AA11 or UA175.
... We boarded the simulator (#2) which was configured as a GE powered 767-300 (marginally different from the 767-200, being a little longer and a bit heavier) and booted up the computers, placing the aircraft at 2000ft above Sydney ... I sat in the pilot’s seat and pushed the throttles to the stops, maintaining wings level and a flat trajectory. To my surprise, within a few seconds we had exceeded the maximum operating Indicated Air Speed of 360Knots/h (415mph); then the needle continued to rise until it hit the stop on the indicator at over 400Knots/h (460mph). At this very fast speed you only have the Mach indication to go off, as IAS (Indicated Air Speed) is off the scale. The aircraft continued to increase speed until it reached .86 Mach (654mph), which is its rated airframe Mach speed limit.
...We took the aircraft to 10,000ft and I commenced a 5 degree dive to 2,000ft and found that the aircraft attained and maintained a speed of .89 Mach (approaching 700mph)"
so no, you misread. he performed his simulations both at 2000 and 10000 feet. in the second case he dropped from 10000 to 2000 feet. in both cases, he achieved the speed of the hijacked plane. he also correctly recognised the speed of sound relative to altitude and correctly calculated the 767's speed relative to its altitude.
the great thing about flight simulator software is it calculates all the variables. it includes things like thrust, lift and drag in its calculations. so if the simulator performs the maths we don't have to. it's built in.
he continues:
"How accurate are Full Flight Simulators and how does the 767-300 compare to the 200?
The flight simulator in which I carried out this test is considered to be an exact representation of the real aircraft. It takes into account all of the test data gathered during the initial flight testing of the 767-200/300 and ongoing data gathered from Flight Data Recorders and observed performance. The instrumentation is exactly the same as the actual aircraft and can be put into service in a real aircraft. The performance of the aircraft engines and the aircraft’s structure are modelled so that a pilot can remain current without doing as many actual flight hours. Basically it is fair to say that what you can do in the simulator can be done in real life, especially as relates to thrust, lift and drag.
After doing this test I then spent a few days on the flight line checking whether the average 767 pilot thought that the engines could achieve .86 Mach at sea level considering what I found in the sim. Mostly they agreed--due to the exceptional power to weight ratio of the 767 series, and its low drag airframe, it was probable it could do just that. I also asked the older pilots that flew in the Pratt and Whitney (JT9-7R4) powered 767-200 series aircraft if those aircraft were similar to fly to the 767-300 General Electric (CF6) powered aircraft they now fly (current simulator configuration). They said they were very similar, having a little less power but being a little shorter and lighter, thus giving them nearly exactly the same power to weight ratio. Once again this was no surprise to me as this is what the manufacturer does--matches the airframe to the power plant to meet the performance specifications which are basically the same for 200 and the 300 series Boeing 767."
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