It's zero-point energy based on the Unified Field Theory. Basically, using the free energy that is all encompassing to power everything you can imagine. In this case, a flying vehicle. Science calls this energy many things: dark energy, tachyons, etheric energy (the Infinite).
Modern science wil not acknowledge the existence of these capabilities because if they did, the energy market would collapse and many many dark souls make money in that sector. This is the reason the patent office forced this particular design to be grounded and posted under "amusement."
As always, discern for yourself. Please read up on the Unified Field Theory, zero point energy, vortex coils, and intelligent infinity (if you haven't already.)