Lego Drone: Quickly Add and Remove Components as Needed 

This drone from Ascent AeroSystems employs a coaxial design to deliver better performance than a comparable multirotor, but it’s most compelling feature is its modularity. This aircraft can be customized for any mission by adding or removing different modules that can include batteries and both top- and bottom-mounted payloads. Rugged and able to fly in any weather, this platform has been adopted by both civilian and military users and is recognized as a Blue UAS for use in government work and other sensitive applications.