Victor shauberger and his repulsine designs did amazing airfoil shapes and translated those into a circular shape with the air flowing from the center of the shape to the outer rim. Most people don't understand that that's what's going on with the wavy shapes of his discs. If you imagine that wavy shape as a two-dimensional airfoil cross section then you can see how the air might flow over that shape and create strong eddies of huge amounts of vacuum and high pressure. Well now if you imagine that same wavy ripple shape in a circular disc and imagine that disc spinning extremely fast then you realize that that disc is going to cause an influx of air into the center of the disc which will be thrown outward by centrifugal force to the outer rim of the disc. All the air will be flowing over those ripple shapes as a two-dimensional foil but going from the inside of the disc to the outside of the disc. One of the things that Shauberger realized was that if he created a shape within that spinning foil for the creation of vortexs in the air flow that he could create areas of condensation where the air vacuum pressure dropped so low that all water dropped out of the air and the air became extremely dry. Additionally that extreme dry air allows for huge electrostatic forces to be developed when the air molecules are literally being ripped apart and rubbed against each other in such a way as to separate electrons from the molecules. Thus you can build huge electrostatic charges in his repulsine while also creating unusual vacuums and other items while also drawing the air. This is why his repulsine engine could actually run by using the evaporation of moisture in the air. As you know the evaporation of moisture in the air causes a cooling differential in the area where the water is being evaporated versus the normal atmospheric air in the surrounding air. So he could inject water into his repulsing and the cooling effect of that water being cooled by the repulsine vacuum and evaporation would create an air contraction as well as more vacuums in the machine in the direction he wanted to go. So instead of having a jet engine which is powered by the expansion of air caused by the explosion of fuel in front of the correct turbines. Shauberger could do the same sort of thing but in a circular disk by using the condensation and the contraction of air caused by the cooling effect of water injected into an air flow in his Repulsine. In other words just imagine a regular jet engine that is instead of being fueled by the expansion of air by hot fuel in front of those final turbines but is instead has a vacuum cleaner at the end of the jet engine which is sucking the air through the turbine. This in essence is what Shauberger was doing with his repulsine. By the way I'm using a voice to text engine here so shellberger's name and some other words are probably not going to be picked up correctly but Victor Shaw Burger is famous person Repulsine Viktor shauberger https://youtu.be/a0PwEwLG9No