[TowerTalk] Universal Freestanding Tower

[Stu Greene]

At 03:24 PM 2/11/02 -0800, Randall Williamson wrote:

>To be very technical airplanes are work hardening and stress cracking
>and breaking down that is why there is a maximum hour limit on the
>airframe.

I had a ride on a B-17G built in 1944 just a few years ago.  It had flown 
over thirty combat missions with the Eighth Air Force according to its Form 
One, the aircraft's log, and has been  flying around the country for years.

We  used B-52s, in Afghanistan, which were built in the 1960s.  Pre-war 
aircraft are flown all over the world. Commercial 707s, DC8s and 727s and 
older 747s have been flying for years.


Maybe someone else has seen an hour limit on fuselage or beams, but I 
haven't.



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