Sunburst test video starts 4:11 in. This machine has an electromagnet in the rotor rather than permanent. This would be around 1980. There was jubilation at the time as the 3-phase drive motor shows virtually no increased load when power is extracted from the machine. At this point they believed the machine could be 20 to 50 times over-unity. However later test by Stanford professor emeritus Robert Kincheloe using a DC drive motor showed only a 5 to 1 efficiency – 500% over-unity. This is still the record for a publically tested N-machine. Most other N-machines including DePalma’s subsequent models, Tewari and Trombly machines were 145% – 300%.