Been trying to figure out the performance increase when going from a Flex to TOGA takeoff. I know variables such as temp, pressure, weight etc all play a part in the calculation.
Wouldn't the biggest variable in this question be the flex temperature used vs the OAT? There should be quite a difference increasing from flex 35 to TOGA on a 45°C day vs. increasing from flex 70 to TOGA on a -15°C day.