Neu's will go well over 60K rpms. Umm my 1521 1.5D is 1900KV. I'm running 12S on it.....do the RPM math ;)
Ok, Jzemaxx I do have a question for you. Does your 1521 have the same motor mount spacing as a 1515?? That is the motor I originally wanted to run but I was under the impression that the 1521s had a different spacing for the mount?