Drones are already being used to perform powerline and infrastructure inspection. The Walkera QL900 is a flying machine designed specifically for bridge inspection. It has a 6-axis motor design and can resist crosswind around the bridge. It has a 3-axis gimbal and camera to conduct inspection on hard to reach areas under the bridge.
QL900’s camera has a 18x optical zoom lens. It captures 4K video and 16MP photos. The above video shows this drone in action.