STATIC LONGITUDINAL STABILITY CHARACTERISTICS OF A BLUNTEDnGUDER REENTRY CONFIGURATION HAVING 79.5° SWEEPBACKnAND 45° DIHEDRAL AT A MACH NUMBER OF 6.2nAND ANGLES OF ATTACK UP TO 20°

摘要

An experimental investigation was conducted at a Mach number of 6.2 to determine the static longitudinal stability characteristics of a model of a blunted glider reentry configuration having 79.5° sweepback and 45° dihedral. The free-stream Reynolds number for the investigation wasn3.0 x 106 based on the basic model length of 7.5 inches. Tests were made through an angle-of-attack range from 0° to 20° (with respect to the ridge line) at zero sideslip only. The investigation showed that incorporating 10° nose incidence in the basic model resulted in a lower lift-curve slope, a lower lift-drag ratio, a higher value of trim lift coefficient, and a decrease in static longitudinal stability. In com-parison, the effect of extending the configuration length and incorpo¬rating 10° and 20° boattail angles resulted in smaller changes in the longitudinal stability characteristics of the model.