Karman-Tsien
OS does like to play with mathematics .. me, I prefer a well aged Port of noble colour and bouquet.
isn't temperature a factor in Mach Number?
Confuses a lot of folk. Temperature is tied up with speed of sound. Mach, however, can be expressed as an equation involving pressures only. The equation comes out something along the lines of
M = (5((qc/ps+1)^0.286-1))^0.5
which I've lifted from an old
thread on machmeters .. and ... if I have counted brackets etc., correctly.