New Takeoff performance with a change of air temperature
Let’s say your max Flex temperature is ISA plus 60. ( sea level, standard atmosphere, max flex 75 degrees)
Let´s say we get a Takeoff performance of 75 degrees flex at an OAT of 20 degrees. You taxi out to the runway and notice the temperature has increased by 5 degrees. Do you have to do a new performance calculation? I just calculated some random figures and it seems the Takeoff performance figures don’t change at all if the temperature goes up and you have a very high flex temperature. Any explanation?