Yes, it's gravity control and free energy. The Biefeld-Brown effect is what offers the free energy. My father would regale Me with what the world would look like when I grew up because of His work:
"Cities would float, cars would fly, and We would have all the energy We could use." And Electrogravitics was shown to work BETTER in a vacuum than in the air.
Again:
Electrogravitics – My Knowledge of Free Energy (article): https://peakd.com/informationwar/@amaterasusolar/electrogravitics-my-knowledge-of-free-energy