Kikapu wrote:bg_turk wrote:[On July 28 1945 a B-25 bomber crashed into the Empire State building and exploded inside it. The building did not collapse, did not have to be demolished, and still stands today. .
Yes, a B-25 did crash into the Empire State Building and caused very little damage. The building was also the first "skyscraper" and was built like a fortress and the B-25 was a much smaller and slower plane, than the B-767. As a result of that crash, when the Twin Towers were built, they took into their calculations to withstand a Jetliner crashing into them. Boeing 707 was the largest jet at the time, so they used that. However, it was only calculated as an "accidental crash" as suppose to "deliberate crash".
"Accidental crash" was to accure during landing or take off, with speeds around 200 MPH and not at 500 MPH by the Boeing 767, which also were heavier than the B-707. Speed and Mass can do a lot of damage, if used properly.
Kikapu wrote:Yes, a B-25 did crash into the Empire State Building and caused very little damage. The building was also the first "skyscraper" and was built like a fortress and the B-25 was a much smaller and slower plane, than the B-767. As a result of that crash, when the Twin Towers were built, they took into their calculations to withstand a Jetliner crashing into them. Boeing 707 was the largest jet at the time, so they used that. However, it was only calculated as an "accidental crash" as suppose to "deliberate crash".
"Accidental crash" was to occur during landing or take off, with speeds around 200 MPH and not at 500 MPH by the Boeing 767, which also were heavier than the B-707. Speed and Mass can do a lot of damage, if used properly.
G.Man wrote:The 707 cruising speed was 600mph, and the force of impact goes up with the square of velocity...
The towers were designed to withstand the impact of a max speed, fully fueled 707, which is a FAR greater force of impact, and far more fuel than the 767-200's that actually hit were carrying.....
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