Quadrocopters are useful for a whole range of applications, but one thing we haven't seen them do (until now) is build something that's capable of transporting humans.

Researchers at the Institute for Dynamic Systems and Control and Gramazio Kohler Research used three drones to build a 7.4m long bridge from a durable low-weight rope known as Dyneema. The software used to control the drones consisted of "sophisticated algorithms" and specialized tools that autonomously built the bridge with the assistance of a motion capture system.

The video above shows the drones moving precisely through the air and around the existing scaffolding to create a rope bridge. The bridge used 120m of rope in total, and although it took some time to construct, it achieved its goal of providing enough tensile strength to support the weight of a human attempting to cross it.

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