Opening time of parachutes under infinite-mass conditions.

out the region and was rated operationally acceptable by the pilots. The airplane was also decelerated from Mach 1.3 to 0.9 by reducing the throttle to the idle setting without deflection of a drag device. The airplane behaved in the same manner quantitatively and qualitatively as with application of the thrust reverser. However, time to decelerate was longer and there was no initial pitchup with reduction of throttle. Speed instability existed throughout the transonic area. In Fig. 8, deceleration times are presented for an initial Mach number of 1.3 at 30,000 ft in the same manner as for the subsonic decelerations. Again, the thrust-reverser mechanization provided performance and handling qualities superior to those of the speed-brake equipped airplane. Summary