NASA-TP-1350

Abstract

INTRODUCTION <br>The F-111 transonic aircraft technology (TACT) aircraft is the latest of a series of research aircraft to incorporate supercritical wing technology. Unlike previous supercritical wing designs, the TACT wing was designed to provide improvements in transonic maneuver capability without degrading the F-111A aircraft's cruise and supersonic performance. <br>A research program was conducted jointly by the National Aeronautics and Space Administration (NASA) and the U.S. Air Force. During the envelope-expansion phase of the flight program, the flight-determined derivatives were used to update the analysis of the vehicle dynamics to insure safety of flight. One goal of the TACT program was to provide stability and control derivatives to establish a data base with which experimental and analytical prediction techniques could be improved for this class of aircraft. To lend credence to the flight-determined derivatives and to indicate the deviation from potential theory, some of the major derivatives were calculated based on computer models of the aircraft's geometry. These are referred to in this report a analytical model derivatives. <br>This report presents the flight derivative data base for the F-111 TACT research aircraft. The flight derivatives are correlated with the analytical model derivatives for specific flight conditions and aircraft configurations.