Which group includes small unmanned aircraft systems with a maximum weight of 55 lbs?

The group that includes small unmanned aircraft systems (sUAS) with a maximum weight of 55 lbs is Group 2. This classification is part of the U.S. Department of Defense's categorization of unmanned aircraft systems.

Group 1 encompasses the smallest sUAS, usually defined as those that weigh less than 20 lbs. They are often used for short-range operations and typically involve lower level flights.

Group 2 is designed to serve the range of small unmanned aircraft systems that can weigh up to 55 lbs, which allows for a broader range of capabilities and payload options. This group typically includes systems that can operate in a wider range of environments and missions compared to Group 1.

Groups 3 and 4 refer to larger unmanned aircraft systems with higher maximum weight thresholds that enable more advanced functionalities.

Therefore, the classification of 55 lbs firmly aligns with Group 2 within the context of sUAS.