If I have only 25% of fuel available to fill up the tanks of a P51D, this should be more than enough to fill up 75% in a 109.
Available fuel should be measured in gallons, not in %. The actual percentual system gives much more fuel to fighters with big tanks.
IMO, each base should start with a predeterminate amount of fuel based on the number of fuel depots present.
Each plane taking off from that base fills its tanks with the fuel amount indicated by the pilot (in gallons), and this fuel quantity is substracted from the total fuel of the base.
Fuel will be added to the bases slowly and depending on refinery operativity, and, if a base is surrounded by enemy bases, no fuel will be dispatched from refineries.
This way, excesive usage of a base will derivate into fuel shortages and will force to switch to another base to take off.
All this is also aplicable to weapons (bombs, rockets, drop tanks, torpedoes, even normal ammo).
I think this system could make AH a much more interesting and strategic game without the need to implement the much more complex supply lines.
