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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: tejek who wrote (397388)	7/9/2008 1:25:25 PM
From: bentway	Read Replies (2) \| Respond to of 1577886

I saw a fascinating show on commercial aviation the other day. In it, one of the reasons given for why commercial airlines transitioned so quickly to jets was maintenance. With a piston-engined plane, all of the engines need to be taken out and completely rebuilt after 20,000 hours of use or less. After 20,000 hours, a jet engine still specs outs as if it were brand new. Jets are still flying today with engines that are over fifty years old.

To: tejek who wrote (397388)	7/9/2008 3:07:29 PM
From: TigerPaw	Respond to of 1577886

There are places in Pakistan which will duplicate almost any part (provided you have one to use as a template).

To: tejek who wrote (397388)	7/9/2008 11:12:59 PM
From: combjelly	Respond to of 1577886

"Can't imagine they are much different with their military planes." Different beasts. Airliners are built with multiple redundancies. They are very hard to break to the point they won't fly. Military jets like the F-14s of that vintage are pretty easy to break. The reason for the overhaul every 20 or so flight hours was to reduce the chances they would just fall out of the air. Which happened with distressing regularity anyway. They pushed the envelope of what was technologically feasible at the time. Not so much any more, but they are headed into retirement. The US learned a major lesson with the F-14 and F-15. And that was not to push the technology so hard. Maintenance is a factor. It doesn't matter how good the planes are if they spend a large fraction of their time being maintained.