Fuel consumption in 109

[CaptainDoggles]

Originally Posted by Kurfürst

I always find that I am down to about 100 liters from max 400 liters really quick, in 10 minutes or so.

You should time it and be sure. I haven't found this to be the case, especially if not running at full power. I routinely take off with full fuel to get maximum loiter time over England, and can stay aloft for a long time indeed at reduced power settings.