I'm not convinced Pinto, as the surface area is huge and so is...

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    I'm not convinced Pinto, as the surface area is huge and so is the distribution of stress?

    Comparing that to a plane prop made of wood and rotating at 2 thousand rpm dragging a couple of tonnes of dead weight around kinds puts some perspective on it?

    Perhaps around the base might be under most stress, but it's also the most mass.
 
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