Fuel temperature before flight here sometimes 45 degrees centigrade. How much of the fuel will disappear through the vents before the fuel temperature is down to "normal level" at high altitude?
Am making some statistics by adding fuel on board and fuel used after APU shut down and then during flight.
Many times this total drops by more than half of route reserve during cruise.
Sometimes back on ground half losses recover but sometimes not.
Have never seen this total going up as would be normal behavior when arguing with "tolerance".
