Speaking of having no credibility,<quoted text>Only to a person without dignity and intelligence.
Why should people find anything you say credible?
Insults Are Easier
I said,The WTC towers were designed withstand the impact of two, count them, two 707's. 707's are considerably smaller then those aircraft that struck the towers, yet not considerably lighter due to the composite materials the newer aircraft are constructed with.
Porkpie Hat wrote, "<quoted text>
You've been shown time after time that the designer of the buildings did a few calculations to prove the buildings would survive a hit from a slow moving 707 lost in fog and no fuel loading was taken into account.
But then there's the fact that the buildings did survive the impacts..,.d'oh!
Leslie Robertson, lead designer of WTC 1 & 2 said,
"The two towers were the first structures outside of the military and nuclear industries designed to resist the impact of a jet airliner, the Boeing 707. It was assumed that the jetliner would be lost in the fog, seeking to land at JFK or at Newark. To the best of our knowledge, little was known about the effects of a fire from such an aircraft, and no designs were prepared for that circumstance. Indeed, at that time, no fireproofing systems were available to control the effects of such fires."
He also said,
"Figure 3 shows the comparative energy of impact for the Mitchell bomber that hit the Empire State Building during World War II, a 707, and a 767. The energy contained in the fuel is shown in Figure 4. Considerations of larger aircraft are shown in Figures 5 and 6. The physical sizes of these aircraft are compared with the size of the floor plate of one of the towers in Figure 7. These charts demonstrate conclusively that we should not and cannot design buildings and structures to resist the impact of these aircraft."