Weight calc/ext tanks 4.13.3-4.13.4

[dimlee]

Originally Posted by Sita

in previous fuel weight calculating in two time... when you attach fuel tank on plane( add weight of fuel tank) and when you drop fuel tank( minus weight of fuel tank )

now flying with fuel tanks must be not so inert ... in a while of flight time

If I read you right...
4.13.3 and earlier versions:
When fuel tank of 200 kg full capacity (just as example) is dropped in flight at any time, total weight of aircraft is reduced by exactly 200 kg. Duration of flight at this point does not matter.
4.13.4:
When fuel tank of 200 kg full capacity is dropped in flight, total weight of aircraft is reduced by <200 kg minus weight of fuel consumed>.
Right?