A320 outer tank temperatures
I notice always on ground and before take off a slight difference in the outer tank temperatur. On the left outer tank for example 7 deegres celcius and on the right outer tank 10 or 11 deegres. It makes a difference of about 3 to 4 deegres.
After departure and about 15 to 20 minutes flight the temperatures on both outer tanks stabilize at the same values.
Can someone explain to me why this happens?
I thank you all in advance for your replies.