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On Dec 9, 7:40*am, Quadibloc wrote:
On Dec 9, 4:31*am, wrote: Do you think their engineers saw the movie called "No Highway in the Sky" *? The people who made the movie probably read (and licensed!) Nevil Shute's book "No Highway". And that book was probably written _after_ De Havilland discovered metal fatigue, being based on the story of that discovery. Ah, I see I'm mistaken. Both the book and the movie preceded (1951) the problems with the Comet (1954). But metal fatigue was actually discovered in 1837, the name having been coined in 1854. But while metal fatigue was known, it was still not fully understood - and it was not anticipated that simply having windows with square corners in the Comet would cause cracks to develop at their corners under the stress of repeated pressurization cycles. John Savard |
#72
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![]() "Quadibloc" wrote in message ... On Dec 9, 7:40 am, Quadibloc wrote: On Dec 9, 4:31 am, wrote: Do you think their engineers saw the movie called "No Highway in the Sky" ? The people who made the movie probably read (and licensed!) Nevil Shute's book "No Highway". And that book was probably written _after_ De Havilland discovered metal fatigue, being based on the story of that discovery. Ah, I see I'm mistaken. Both the book and the movie preceded (1951) the problems with the Comet (1954). But metal fatigue was actually discovered in 1837, the name having been coined in 1854. But while metal fatigue was known, it was still not fully understood - and it was not anticipated that simply having windows with square corners in the Comet would cause cracks to develop at their corners under the stress of repeated pressurization cycles. John Savard http://www.ejpau.media.pl/articles/volume8/issue4/art-34-fig4.jpg |
#73
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On Dec 9, 9:50*am, Quadibloc wrote:
On Dec 9, 7:40*am, Quadibloc wrote: On Dec 9, 4:31*am, wrote: Do you think their engineers saw the movie called "No Highway in the Sky" *? The people who made the movie probably read (and licensed!) Nevil Shute's book "No Highway". And that book was probably written _after_ De Havilland discovered metal fatigue, being based on the story of that discovery. Ah, I see I'm mistaken. Both the book and the movie preceded (1951) the problems with the Comet (1954). But metal fatigue was actually discovered in 1837, the name having been coined in 1854. But while metal fatigue was known, it was still not fully understood - and it was not anticipated that simply having windows with square corners in the Comet would cause cracks to develop at their corners under the stress of repeated pressurization cycles. The last sentence in the next-to-last paragraph is interesting: http://www.century-of-flight.net/Avi...nd%20Comet.htm As is this exchange about one year before the metal fatigue accidents: http://www.theyworkforyou.com/debate...-03-11a.1284.0 Since the manufacturer had done only static and not dynamic tests, one is left to wonder what secrets the HoC was trying to protect. |
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