OK guys - here is the solution:
It´s up to the date and therefore the plane you are flying with.
Tried a solo Fokker DVII for myself against 3 ACE Spad XIII. Killed the first one quite easily, tried to nail the second and have been shot by the third one...
Second try - got the first one again, but was shot down instantly by the other ones.
So a realistic explanation to me could be, that at the beginning of the war there were no good fighter pilots - where should they come from (there haven´t been any wars with air combat before!). Proceeding with the war, the pilots became better and better.
So for us "pros", who have fought in many wars
the beginning could be to easy....
Dam - Konrad Zuse should have been born a few years earlier and we Germans could have trained in sims for war
Cheers & Prost
MadMonty
P.S.: How the hell can I unjam my gun - I think I need that key for now on...