 The F-104 also performed many safety chase missions in support of advanced research aircraft, and provided a launch platform for sounding rockets.In August 1956, the USAF transferred YF-104A serial number 55-2961 to the National Advisory Committee for Aeronautics (NACA, the predecessor of NASA), designating it NF-104A.In preparation for the X-15 test program of the late 1950s, it was fitted with the reaction control system (RCS) consisting of hydrogen peroxide-powered thrusters mounted in the aircraft's nose and wingtips.