Swiss engineers at ETH Zurich have used three quadcopters to autonomously construct a 120 metre suspension bridge , strong enough for humans to cross . The drones were fitted with a rope spool , capable of tightening the rope around wooden scaffolding posts . A total of 120 metres of rope was used to build the bridge structure .
Swiss engineers at ETH Zurich have used three quadcopters to autonomously build a seven metre rope bridge, strong enough for humans to cross. The drones were built with a rope spool, capable of tightening the rope around two scaffolding structures. A total of 120 metres of rope was used to build the bridge structure.