As much as I would like to create a calculator that generates that graph, there just isn’t enough data available about most motors currently.
Data like this is needed. It must be a community effort.
I can make a thread that discusses the details of the to be made calculator, but without data about the motors we won’t get too far. TLDR is that it likely won’t be perfectly accurate. I don’t want to derail this thread too much though, will write up a thread about this in a few days, it’s fairly complex.