Drones 101, Part 1

摘要

We've entered the age of the drone — formally called unmanned aerial vehicles (UAVs) or unmanned aircraft systems (UASes). Drones can be any aircraft operated without a human pilot aboard and have been around since World War II when they were first used for military tasks. But here we're focused on small, multirotor aircraft weighing less than 55 lb. and used for commercial purposes.