RPM measurement

Today I did some RPM measurement to calibrate the throttle control. As I have a Arduino to produce the input signal for the ESC, I can put it easily to any desired value and watch the RPM count from the Hall effect sensor.
I made the measurement with the 40" propeller and here is the result. The input signal varies from 0-179 and the RPM output has the expected curve. The max. RPM for this motor is 5800. At 5400 RPM I measured a thrust of about 13kg which is in accordance with the previous measured valued.
The output signal is now limited to 150 to not exceed this power setting.