Military lab DARPA has put out a call for rotor blades that could boost payloads by 30 percent and range by 40 percent, as well as reduce sound by 50 percent and vibration by 90 percent compared to the usual fixed rotor blades.
The agency envisions helicopter blades that can morph into different modes for "fuel efficiency" or "high maneuver," as examples. Adaptive technologies could change the diameter, sweep, chord, and tip shape of the blades, as well as other features.
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