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Thursday, March 12, 2009

Shape Shifting Blades

Helicopters are roaring machines, chopping up the air in thunderous claps.  It would be amazing to invent a blade that could cancel rotor wake vibrations. NASA is working on shape shifting blades with control flaps that will quiet the noise and save fuel. According to fastcompany.com, “Embedded with piezoelectric actuators—that is, materials that change shape when jolted with electricity—the surface of the blades flex up and down.By programming the motion of the blades with the right periodicity and amplitude, they can cancel out the vibrations caused by rotor wakes.” For related news

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