Through the years, Dryden has used a variety of chase and support aircraft. First acquired in August 1956, F-104s were the most versatile work-horses in Dryden's stable of research and support aircraft, with 11 of them flying mostly research missions over the next 38 years. Tail number 826 flew the last of these missions on 31 January 1994. By then the 11 F-104s had accumulated over 18,000 flights at Dryden in a great variety of missions ranging from basic research to airborne simulation and service as an aerodynamic testbed.