D. Robin Stowell, a typesetter by trade, typeset a book “Brighter Than a Thousand Suns” during the 1940’s, which was an authoritative history of the race to build the first Atomic Bomb. Stovell never forgot a brief reference to a Nazi Flying Saucer space ship that could out-maneuver any allied aircraft.
Four decades after this, Stowell found a copy of the out of print reference book and confirmed what he had long recollected. A footnote describes German Flying Saucers space ships that were forty five yards across, capable of reaching speeds over Mach One and climbing to an elevation of nearly eight miles. Some experts believe that these Nazi Flying Saucers could have been responsible for the legendary Foo Fighter sightings over Europe late in World War II. But if they were, it still does not explain UFO Foo Fighters spotted over the Pacific during the same time period.
There were a number of brilliant Nazi German scientists and engineers working on flying disc-shaped craft, many of which used traditional rocket/jet propulsion techniques...but some, apparently used methods far in advance of anything commonly known at that time...Or now, for that matter.
Dr. Viktor Schauberger working in Austria at the Kertl factory in Vienna led another highly-advanced group. Schauberger's incredible craft allegedly utilized a tornado-like vortex which produced magnetic effects said to cause levitation. Of two Schauberger copper flying saucer models were built and one of them was successfully test flown. In fact it flew so well that it hit the inside roof of the hangar and was destroyed.
The SS which was apparently overseeing this experimental work, stopped further experimentation on all German flying saucer space ship research after accident and allegedly, dismissed Schauberger, who took all of his work and wizardry to some other location for further development. After the war, Schauberger was drawn to the U.S. by an alleged CIA front company and was then duped into signing a contract in English (he knew only German) giving the company all rights and title to his inventions, concepts, and designs. He was then returned to Austria...and died five days later.