I thought this was already solved in Usenet around 1985? "If there is two mediums moving at different speeds, we can harness this energy gradient to do stuff,

I thought this was already solved in Usenet around 1985? "If there is two mediums moving at different speeds, we can harness this energy gradient to do stuff, like moving some objects at some speed. And those three speeds have nothing to do with each other, the generated speed can very well be greater than first two, if the energy harvested is greater than energy needed."