Thanks! It explains a lot.
Some stuff i noticed:
-just as like Denniss said, the 109's speed curve isnt even close to the 109Gs modelled in AH. They look very simmilar to the Spitfire8's two staged Merlins. The top speeds at sea level and altitude matches fairly good tho.
-the 410's one is rather close to the one modelled in AH, there are some differences tho
-at sea level, it does 510kmph ~ 318mph, by the chart, its about the same as in AH (1.3 ata)
-at 2km ~ 6k feet altitude, the AH's 410 does ~335mph at 1.3 ata, thats significantly less than what the chart says: 562kmph ~ 351mph. In AH, the plane only reaches it at 10k.
-the absolute top speed is exactly the same in AH and on this chart, along with the top speed altitude.
-the chart says, 9500kg~20800lbs, mit waffen, thats about 40% fuel with the lightest gun configuration. Very close to the circumstances of how i tested it.
Still cant understand the extremely poor instanteous turn rate, even tho the relatively isnt too bad wing loading.
May i suggest reviewing the speed/altitude chart near 6-10K?