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Nasa Icing courses



 
 
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  #1  
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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  #2  
Old January 9th 06, 01:36 AM 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)

David Lesher wrote:

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...


Yep, that's a very old technique. Westerners call it "Damascus steel."

George Patterson
Coffee is only a way of stealing time that should by rights belong to
your slightly older self.
  #3  
Old January 9th 06, 01:41 AM 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 wrote:
David Lesher wrote:
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...


Yep, that's a very old technique. Westerners call it "Damascus steel."


Got a knife made using that technique. Beautiful grain, sort of like a
nice gun stock made with multiple layers of different wood, beautiful
when carved.

The Monk

  #4  
Old January 18th 06, 06:00 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)

On Sun, 8 Jan 2006 19:41:33 +0000 (UTC), David Lesher
wrote:

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...


Right, but the entire blade is heat treated so that it is tempered,
rather than hard. If it were made from the kind of steel that
camshafts were cast from, it would be very brittle.

Not many camshafts, in low rpm engines, require forged camshafts,
there just isn't much pressure on them because they spin so slowly and
the valve springs aren't very stiff. But all camshafts require heat
treating the outer layer, or they'd wear out very quickly.

Corky Scott
 




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