Schulgen asks to look for signs of unusual production of materials that could contribute to reduce weight on aircrafts:"Unusual fabrication methods to achieve ecstreme light weight and structural stability particularly in connection with great capacity for fuel storage"."
Farrell shows in his book, Roswell and the Reich (2010), how a number of details in the descriptions of the debris can be traced back to Nazi Germany and the research associated with the German war projects in metallurgy, etc., which aimed to reduce weight of aircrafts - either research and development that indisputably happened in Nazi Germany, or projects that there is reason to believe were probably happening.
Another statement that very clearly demonstrates that the memorandum is partly based on the Roswell-crash and the investigation of the debris is this:"Type of material, whether metal, ferrous, non-ferrous, or non-metallic; and "Composite or sandwich construction utilizing various combinations of metals, plastics, and perhaps "BALSA WOOD"."
I-beams of balsawood, balsawood or plastic-like material / other lightweight materials were mentioned by witnesses in the descriptions of the debris!
It is very unlikely that Schulgen would have mentioned balsawood without having read about / been briefed on the investigation of the Roswell debris.
It is also worth noting that Major Marcel mentioned a kind of porous metal in the description of the debris - that one could blow through.
In this regard, Shulgen writes in his memo:"...boundary layer control method by suction, blowing, or a combination of both" and "Openings either in the leading edge top and bottom surfaces that are employed chiefly to accomplish boundary layer control or for the purpose of reducing the induced drag. Any openings in the leasing edge should be reported and described as to shape, size, etc. This investigation is significant to justify a disc shape configuration for long-range application"."
... And to the conclusion of the document:"The power plant would likely be an integral part of the aircraft an could possibly not be distinguished as an item separate from the aircraft. If jet propulsjon is used, large air handling capacity, characterized by a large air inlet and large exhaust nozzle, should be evident. The size of entrance and exit areas world be of interest. It is possible that the propulsive jet is governed or influenced for control of the aircraft. The presence of vanes or control surfaces in the exhaust or methods of changing the direction of the objekt should be observed."
On this basis, it should be clear what the U.S. air force believed they were facing, namely jet-turbine-powered saucer shaped aircraft (built in lightweight materials) which extraordinary maneuverability and performance was based on eliminating the problem of "the boundary layer" and thus reducing air resistance and friction.
W.A. Harbinson, in the book "Project UFO: The Case for Man-Made Flying Saucers (2007)" sheds light on "the boundary layer" and the porous metal Maj. Marcel mentions;
"Further; if such a craft could be built with a 'porous' metal that would act like a sponge and remove the need for air intakes altogether, it would result in 'frictionless airflow' during flight (...) such a craft would 'slip through the air in the same way as a piece of wet soap slips through the fingers (...) the speed and manoeuvrability of such a craft would be virtually limitless (...) While the idea of 'porous' metal sounds like something from science fiction, it was in fact being developed in Nazi Germany (...) Among the many other advanced experiments being run in the wind tunnel in the Zeppelin works at Friedrichshaften were those concerning the different 'porous' metals, or 'aeropermeable surfaces' that were being created by the scientists of G"ottingen, Aachen and Volkenrode - various compounds of magnesium and aluminium, sinterized and permeated with microscopic holes. It was called Luftschwamm, or 'aerosponge'. "
In other words, major Marcels description of a porous metal in the Roswell debris (which one could blow through) points directly to Nazi Germany.
Furthermore, to build an aircraft of this type would depend on making the hull thicker to compensate for the weakening of the metals caused by a number of microscopic holes, - or, - the metals necessarily had to be produced lighter and stronger - and one would therefore expect that Nazi Germany's research in metallurgy projects would be implemented at this - and that's exactly what several researchers have found.
