Abstract

A hypersonic e ight experiment was conducted for development of the Japanese unmanned operational orbiting plane. The following aerodynamic characteristic data are presented for a e ight ranging in Mach number from 2 to 14: aerodynamic force coefe cients, longitudinal trim characteristics, stability and control derivatives, elevon hingemoment, and surfacepressuredistribution.Thedata arecomparedwithpree ightpredictionsbased on windtunnel test results and computational e uid dynamiccalculations to evaluate the validity of the prediction methods, including determination of uncertainty in the vehicle design. The prediction methods are proven to be generally valid for design of lifting re-entry vehicles at a high angle of attack, whereas some anomalies are found in axial force, elevon trim angle, and reaction-control-system gas-jet interaction.

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