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The two towers were designed to sustain an accidental hit by a 707 on a descent trajectory. They were instead purposely hit by much larger 747s and at a much h
by atdrummond 5y ago
The two towers were designed to sustain an accidental hit by a 707 on a descent trajectory.
They were instead purposely hit by much larger 747s and at a much higher cruising speed. This meant that the kinetic energy transfer was approximately 8x larger than expected. The 747s at the time of impact also held significantly more fuel (at least 100% more) than those utilised in the 707 attack model.
- O5vYtytb 5y agothey were not hit by 747s
- archon810 5y agoThe twin tower planes were: 767-200 767-223ER
- atdrummond 5y agoCorrect. Sorry, I had originally typed 767 and then in an edit swapped as everyone else said 747 and I thought perhaps I was having some sort of Mandela Effect going on. The size and speed differential holds true - a cruising speed extended-range 767 is much faster and larger than the equivalent, landing-approach 707 the building was “rated” for.