Recent content by AEROfighter

The XP-72 flies at a speed of 789 km/h at an altitude of 25,000 ft (7.62 km), where the speed of sound is around 1,115 km/h. Using the Mach number formula, M = speed of the XP-72 / speed of sound at the same altitude, gives M = 789 / 1,115 = 0.71. This is a reasonable estimate of its Mach number...