Strobes_on
The formula is often quoted in the form: t°/T° = (1 + M²/5)
where t = stagnation temperature (°K), T = SAT (°K), M = Mach Number
Thus we get: Stagnation Temp (°K) = T° + 0.2T°M²
and it follows: Ram Rise (°C) = 0.2 T°M²
Substituting for Mach Number, using the formula TAS = 38.89M x Square Root of T°
we get: Ram Rise (°C) = (TAS x 0.0115)²
Well remembered!