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Feb26-12, 07:08 PM
P: 17,227
Quote Quote by audiomatic View Post
Thanks all,

So . . . the Special Relativity factors that may prevent an object from achieving C (increased mass, elongation in the direction of travel, time slowing down) would not control in the case of windmill blades (or “objects” rotating around an axis). General Relativity (the curvature of space), not stresses on the blades, would “cause” the blades to curve before Special Relativity considerations become relevant. Am I interpreting this correctly?

To the second question: If the blades cannot remain straight due to the curvature of space (rather than stresses imposed due to the blade tips being unable to achieve C), would there be any reason for the rate of rotation at the hub to slow, or is rotation at the hub unaffected by the curvature of the blades?

Thanks for indulging us and not citing formulae. I will certainly pass along n4n0b0y’s suggestion that the inability of the blade tips to achieve C can be equally accomplished with a merry-go-round; somehow this seems more practical than the windmill idea.
AFAIK n4n0b0y's comments are completely incorrect and totally unsubstantiated. The blades will not curve inwards, like any material they will stretch outwards under the radial stress and according to GR they will break no matter how strong the material. His/her comment would be the worst one to pass along.