Passive Force Balance Aids Tiny Aerial Robots

Researchers at Harvard have created a tiny version of an automobile differential to balance wing forces. It turns out that that the torque applied to wings is much more important to stable flight than their exact position. This passive approach automatically adjusts to compensate for various forces like wind gusts, shifting payloads and damage that can throw a winged robot off course. This approach also leads to a simpler and more lightweight system that is easier to produce.

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