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A-12/SR-71 Fuselage Stretch

KJ_Lesnick

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I was told that the plane increased in length something like 9 to 13 inches at speed due to kinetic heating.

Where does the plane stretch? Forward of the wing right?
 

Machdiamond

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I would imagine that by virtue of thermal conductivity throughout the structure, the stretching would be more or less uniform over its length wouldn't it?
--M
 

KJ_Lesnick

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One would think, but the wings handle the expansion through their corrugations. From what I remember they get a little deeper when heated then shallow out when cooled.

So I'm guessing the only way the length can increase is the chine..
 

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