Leslie Robertson quote.
We had designed the project for the impact of the largest airplane of its time, the Boeing 707. The 767 that actually hit the WTC was quite another matter again. First of all it was a bit heavier than the 707, not very much heavier, but a bit heavier. But mostly it was flying a lot faster. And the
energy that it put into the building is proportional to its square of the velocity, as you double the velocity, four times the energy. Triple the velocity, eight times the energy and so forth.actually triple velocity means nine times the kinetic energy.And then of course with the 707 to the best of my knowledge the fuel load was not considered in the design, and indeed I don't know how it could have been considered. But, and with the 767 the fuel load was enormous compared to that of the 707, it was a fully, fully fuelled airplane compared to the 707 which was a landing aircraft. Uh, just absolutely no comparison between the two.
A 707 fully laden would have weighed 328,000lb.A fully laden 767 would weigh 395,000 lb so Robertson is right,but hang on it wasn,t fully laden was it.It was barely half full of passengers and cargo and only fueled for the trip meaning it only had 10,000 gallon of its 23,000 gallon capacity.Far from being much heavier it was in fact lighter.So a basic lesson on kinetic energy is that KE equals 1/2 X Mass X Velocity squared.Keep this in mind.
So who was Robertson?Well he worked,as an employee of Worthington,Skilling,Helle and Jackson.His boss was John Skilling considered a leader in his field.So what did Skilling say as it was obviously more important than what Robertson,the employee,said.
The buildings have been investigated and found to be safe in an assumed collision with a large jet airliner{ Boeing 707 DC 8} traveling at 600 miles per hour. Analysis indicates that such collision would result in only local damage which could not cause collapse or substantial damage to the building and would not endanger the lives and safety of occupants not in the immediate area of impact.�
So taking the words of the organ grinder,not the monkey and using the equation given a fully laden 707 traveling at 600 mph would cause considerable more damage than a 767 traveling at 484mph not being fully laden so lighter and traveling slower.KE equals 1/2 X mass X velocity squared you can see already that i am right.Nearly forgot a 707 had four engines to a 767 which had two.
This is Mackay,s very first point and he is clearly being deceptive in not acknowledging Skillings words,yet relying totally on Robertson,s clear nonsense.First point and he failed miserably is there any need to carry on reading it?i don,t think so.
