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Discussion in 'Area 51' started by farnetti, 27 June 2017.
Thanks for the correction.
Presumably, when they read the same when it's cold...
I recall sitting aft in an American passenger plane many years back. The bogs were sort-of cubicles in the middle, perhaps just ahead of the wings, and the overhead luggage bins were not attached to them. The result was that you could see several inches of flex & resultant relative movement between the floor-mounted bogs, and the top-mounted bins throughout the flight.
I'm an Engineer by profession, and am pretty sure my aeronautical peers got their sums right, but it wasn't a reassuring scenario!
That is just amazing, when you consider the outer skin stays water-tight with such frame movement.
Unlike the WW2 U.S.-designed LIBERTY cargo ships, which were so rigid they simply snapped in two - bigly (apologies for the Trumpism).
Not sure it was the rigidity that caused them to fail.
Iirc, a combination of cold-induced brittleness, and the fact that they were welded, allowed cracks, initiated at the sharp corners of the hatch ways to propagate throughout the structure, until a failure was inevitable.