Researchers at Harvard, MIT and City University of Hong Kong
Formerly manufacturers of unmanned aerial vehiclesdevices wishing to take this small step, abandoned powerful motors and lost the efficiency of devices in favor of piezoelectric rigid actuators based on ceramics. The new drones are based on soft drives made of rubber cylinders coated with carbon nanotubes. When voltage is applied to these nanotubes, they compress and stretch the rubber.
The researchers note that this combination is veryeffective. These drones are "centimeter scale", they can move even through small areas, perform tough maneuvers and survive some collisions without damage. They weigh as much as a bumblebee.
At this stage, there are many restrictions on their use. Insect-style drones are still tied to energy sources.
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