With a 500hp shunt wound DC motor, at 1800rpm, 500Vdc, FLA is 800Adc, Ra is 0.02

Question

                    With a 500hp shunt wound DC motor, at 1800rpm, 500Vdc, FLA is 800Adc, Ra is 0.025 and Rf is 400. I have the following, Armature: current, resistance and volts,                     Field: current, resistance and volts, Volts per rpm, Power in and out, and torque. I am sort struggling with one part.                 

How do I find the no load speed?

                                     Thanks for the help

Explanation / Answer

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