Srcooke, thanks for the answer: Support: You are right, there is a support page and I will try that link and will let you know if I get answer and when. But I doubt because the forum is "closed" since a couple of years. Aircrafts: Weights are not the problem. What I am looking for is a tool to calculate V1, V2, VR and FLEX and not just for the A320 CFM....... Database: I think GOSHOB made a nice and correct statement on this....... Regards, Rolf