20.5-Inch-Mirror-Blank-Project

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Revision as of 23:26, 10 March 2007 by 68.3.161.63 (talk)
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Originally I started with a 16 inch circular cutout mirror blank. Circular is a bad choice due to concentrating stress in the narrowest part of the webbing. The 20.5 inch casting was designed with a hexagonal webbing.

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