I have looked at my video to see why some would think it is unpowered (as others have asked the same question)and I now realize that some may have thought the solenoid was an output coil. This is an input coil used to position the stator magnet.

The pulse to the solenoid is 40ms in the video. I have experimented with another retail solenoid and have been able to reduce the pulse width to 20ms. This is still 20 times greater than what I was looking for.

The unique nature of this approach is that the rotor is propelled by the stator, not the solenoid. This means that a large scale stator / rotor system could be propelled in a similar fashion with a very small pulse input on a control solenoid.

The video is a proof of OC's latch concept. It also demonstrates magnetic shear which allows the magnets to pass each other while minimizing negative torque on the rotor.

It is believed that Alsetalokin was able to achieve this same thing with the inertia of his stator. However, so far all replications have failed to provide sustained rotation without external energy added. I have done extensive rundown tests through a wide range of RPM's with my rotor and stators during corotation sync and did not find any indication that the system would sustain rotor rpm. Alsetalokin has indicated that he built a second unit that performs as the first but still does not deny an external source of EM power.

My video shows no external source of EM power is needed other than the 40ms pulse. And hopefully this can be improved significantly.

Source: http://peswiki.com/index.php/OS:MPMM:Variant:Harvey#Power_Source [peswiki.com]