The Beechcraft B-200 King Air is a turboprop aircraft used both for commercial and military purposes. NASA operates multiple B-200 aircraft, along with several other organizations, including the University of Washington and the National Center for Atmospheric Research (NCAR). The B-200 has a maximum flight duration of six hours and can operate at altitudes greater than 30,000 ft. The useful payload can vary but typically falls between 1,000 to 5,000 lbs.