I am developing a small program, working with Microsoft Flight Simulator 2020. For now, I can show my takeoff graph which display the altitude on the y axis and the distance in x axis. I would like to add Vx and Vy curve on this chart but I can find an easy way to determine these curves with the data I have. So my question :
Based on my actual indicated speed and climbing rate. If I know that my Vx speed is, let's say 55kt, how can I find the corresponding climbing rate ?
More precisely, if (at full power) :
Vi=62kt => climbing rate is 750ft/min (data that I know)
Vx = 55kt => climbing rate is ????
Vy = 70kt => climbing rate is ???
I know there is some formulas including weight, drag, etc.. but is there a way to find the climbing rate Vx, Vy with already a Vi/climbing rate relation that I know like above ? I'm sure there's a way to find it but I'm stuck. Thank you a lot for your information.