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Old January 8th 06, 07:41 PM posted to rec.aviation.ifr,rec.aviation.owning,rec.aviation.piloting,rec.aviation.student
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Default Engine Making Metal (Was: Nasa Icing courses)

George Patterson writes:


"So why not build the shaft entirely of hardened steel?", I hear you cry. That's
because the harder steel is, the more brittle it becomes. The best strength
comes from this sort of lamination of hard and soft steels.


Saw a show w/ a Japanese craftsman making a sword. Two layers of
different steels. Pounded it thin; folded it over; pounded...
Many layers later, that was the sword...

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