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I've always wondered what kind of stresses and resulting deformations jet engines are subjected to when running.

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  • $\begingroup$ @FreeMan My apologies. I added "fan blades" to the title in order to clarify, after Notts' comment. Thanks! $\endgroup$
    – flextempers
    Commented Dec 2, 2016 at 19:53

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I don't know the exact answer, but it's on the order of 0.100" (i.e. it's more than 0.010" and less than 1.00"). The more interesting part is that it's not just a simple linear stretching. The blades have a twist to them, and at speed they untwist, which is a strong contributor to the total change in length from 0 rpm to redline.

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