https://espace.library.uq.edu.au/view/UQ:347551OK looked through some of my information and found the guy/inventor, his name was Viktor Schauberger. And his engine was the Vortex engine. There are many companies to day trying to replicate and advance his ideas, but most are using them as a "free energy" thing.
http://discaircraft.greyfalcon.us/Viktor Schauberger.htm
https://www.google.com/search?q=viktor+schauberger+vortex+engine&client=firefox-b-1-d&sxsrf=ALiCzsY24HF5gsowGPTaGXLsALsDzWtUsQ:1658500696215&ei=WLbaYpbpDOfl5NoPwdGu0Aw&oq=Viktor+Schauberger.v&gs_lcp=Cgdnd3Mtd2l6EAEYADIGCAAQHhAWMgYIABAeEBYyBggAEB4QFjIGCAAQHhAWMgYIABAeEBYyBggAEB4QFjIGCAAQHhAWMgYIABAeEBYyBggAEB4QFjIGCAAQHhAWOgcIABBHELADSgQIQRgASgQIRhgAUKwXWKwXYPc4aAFwAXgAgAGkAYgBpAGSAQMwLjGYAQCgAQHIAQjAAQE&sclient=gws-wiz
It was all part of the master plan to stop 'free energy' and to introduce unnatural substances into our essential body fluids.