Recently there was a non-fatal crash involving an amateur built helicopter. The cause of the crash was a fatigue failure in a 0.5ODx 0.325"ID 27.9" long aluminum control tube. The tube was anodized with color to assist in building an award winning ship. It won at Oshkosh. The question is does anodizing reduce the fatigue life of aluminum? I've seen gyrocopters and helicopters with liberal use of anodized aluminum tubing and pieces.
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