From: CurtAdams@aol.com
Date: Tue Aug 20 2002 - 10:21:50 MDT
In a message dated 8/20/02 6:01:02, bradbury@aeiveos.com writes:
>Not planes per se, but the evolution of planes. As I recall a bomber once
>crashed into the Empire State Building with little negative effect. What
>is interesting is that the WTC were built in 1970-72 and the 767 design
>was started in 1978 and first flew in 1981 (less than a decade apart).
>It seems clear that there was a lack of thought about building strength
>relative to mobile energy capacity.
Just a side effect of improved engineering. Early skyscrapers were
overdesigned since practical experience with skyscrapers was limited
and theoretical work too hard. Modern skyscrapers are less overdesigned
and have less leeway.
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