Studying there under the guidance of the famed aerodynamicist Ludwig Prandtl,[4] who regarded him as his best student,[5] Multhopp assisted in the design and construction of several gliders while working on a thesis on the subject of wing aerodynamics.

[3] During his time at the university, he also participated in experiments under the aegis of the Aerodynamische Versuchsanstalt (AVA), the German counterpart to the American National Advisory Committee for Aeronautics.

More importantly he had already published a seminal paper on wing-lift theory [6] and before he had fulfilled his doctoral requirements, his work had attracted the interest of other German aviation concerns.

[10] However, due to the deteriorating war situation, delays in development meant that only wind tunnel models had been completed by the time of Germany's surrender.

These files captured by the Americans in 1945 clearly indicated delta and swept-wing designs had the effect of "reducing drag dramatically as the aircraft approached the sound barrier."

[14] Beginning in 1947, 62 of the technical staff along with a small group of test pilots followed Tank to reestablish themselves at the Fábrica Militar de Aviones at Córdoba.

[17] During four years spent working at Farnborough, Multhopp and Winter's studies of swept-wing planforms resulted in the design of a unique high-speed research aircraft to be powered by the Rolls-Royce AJ65 Avon.

[7] The SV-5, the centerpiece of the START (Spacecraft Technology and Advanced Reentry Tests) project, was promoted by Multhopp as superior to NASA's M2 and HL-10 lifting body shapes, having a better lift-to-drag ratio and greater re-entry cross-range capability, along with better aerodynamics and improved design efficiency.