The McDonnell Douglas C-9 (Nightingale) is an American twin-engine, T-tailed, medium-range, swept-wing jet aircraft used primarily for Air Mobility Command's aero-medical evacuation mission. The C-9 is a modified version of the McDonnell Douglas Aircraft Corporation's DC-9. It is the only aircraft in the USAFinventory specifically designed for the movement of litter and ambulatory patients. It is powered by two Pratt and Whitney JT8D-9A turbofan engines giving a speed of 565 mph and a range of 2000 miles. Research C-9
 
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