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A new palm-sized drone is mini, but mighty-

This feat is a marked improvement over other flying robots, which generally can’t tote objects heavier than about their own weight (SN: 2/7/15, p. 18). The new palm-sized flyer, described October 24 in Science Robotics, could work in factories or help with exploration and search-and-rescue missions.

Each 100-gram quadcopter is equipped with either gecko-inspired adhesive or microspines, which resemble tiny fishhooks, that help it cling to various surfaces (SN Online: 6/28/17). After attaching a cable to an object, the drone flies to its destination, anchors itself to its landing spot and uses a mechanical winch to pull in its cargo. This sequence of events allows the drone to transport objects that would be too heavy to carry while flying.

Mechanical engineer Matthew Estrada of Stanford University and colleagues flew one of their drones up to a partially collapsed building, where the robot affixed itself to a concrete overhang and lifted a 200-gram payload including a camera off the ground to peer into the ruins.

Another pair of drones teamed up to open a heavy door. One robot hooked a loop around the door handle, stuck itself to the door and yanked the handle down. The other drone tucked a spring-loaded hook under the door, bit into the carpet with its row of microspine teeth and pulled the door open.

In the future, teams of heavy-lifting drones could help schlep inventory in warehouses, turn valves in factories or clear rubble in disaster zones.


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