As jack9 proposed higher up in this thread, you could put the EmDrive on the outside of a rotating system to provide constant torque, which accelerates the rota

As jack9 proposed higher up in this thread, you could put the EmDrive on the outside of a rotating system to provide constant torque, which accelerates the rotation. Then wait until the system has sped up to the point where the kinetic energy increases faster than the power you put in. Then use the whole thing to drive a generator.