Regarding Q226, when it says OAT = ISA + 10ºC does it mean that using ISA we must calculate the OAT, in this case: 15ºC at SL - (41*2) = -67ºC at FL410 but in ISA is -56.7ºC and then add 10º to this OR do we do this: 15ºC at SL + 10º C = 25ºC at SL - (41*2) = -57ºC but in ISA -56.7ºC? Using the CR-3 circular computer, when do we subtract the temperature rise from the OAT reading?
Q65) Thanks Danny C. It appeared to be that I was calculating the GSout and GSback incorrectly, not subtracting/adding HW/TW to ETAS whilst I was using TAS.