Chinese hybrid multirotor makes 100km China Bohai Sea crossing.

Two multirotor drones powered by Hybrid system successfully crossed the 62 miles (100 km) China Bohai Sea, from Shandong Yantai to Dalian Lushun Port, one non-stop flight of 2 hours 55 minutes. The world's longest electric driven multirotor sea flight record was created. This 8.8 lbs (4 kg) hybrid heart provided power for extremely long ["]