In a message dated 2/11/02 3:52:54 PM Pacific Standard Time,
wa2moe@firstinter.net writes:
> >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.
>
A couple of things to keep in mind. 1 - The military planes are built to
MIL SPEC standards which are much higher than civilian ones so they're
designed to last much longer. 2 - Other countries have much different
inspection rules than we do. Where do you think all those old US airliners go
when they're retired by US carriers?
Cheers,
Steve K7LXC
Tower Tech
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