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August Kupper saw the light of day in 1905. He was no ordinary engineer from the flight - vehicle construction , rather Kupper was a physicist and aerodynamics , so to speak, a theorist. His career began at the Academic Flying Group at the Technical University in Munich, when he was involved in the development Akaflieg Munich Mü.3. During Kupper also continued to work with the students Akaflieg , but he also designed their own gliders.  Together with the famous Segelflieger Robert Kronfeld was born 1931, the extraordinary Ku.4 " Austria".  But in a thunderstorm , the aircraft was broken and Kronfeld was able to escape with a parachute.  Dr. Kupper died in 1938 in a crash with his Ku.7 own design.

Kupper Ku.1 (Akaflieg München Mü.3) Sailplane 1928
Kupper Ku.2 "Uhu" (as you can see)
Kupper Ku.3 (akaflieg München Mü.5) Sailplane 1930
Kupper Ku.4 "Austria" record Sailplane 1931
Kupper Ku.5  B)
Kupper Ku.6  B)
Kupper Ku.7 Sailplane 1938

August Küpper (1905-1938) was an aeronautical engineer and for a time headed the Akaflieg Munich. His most successful design was the Ku 1/Mü 3 Kakadu, which was the most powerful aircraft of the group for years.
In 1928-29 he designed the flying wing high-wing eagle owl together with Dipl.-Ing. Kennel at the Polytechnic University of Friedberg/Hesse. The machine had a wingspan of 17.1 m and was steered by external elevons and end disc rudders. The eagle owl (Ku 2) did not have sufficient flight characteristics. Later, Küpper tried to turn the aircraft into a motor glider by slightly sweeping the wing back and installing a small engine. Here, too, the properties remained inadequate.
The next attempt at a flying wing also failed: The Ku 3/Mü 5 Wastl, in which Egon Scheibe was involved, was never made to fly
.
Küppers' best-known construction was the one built for Robert Kronfeld. Austria". The Austria had a wingspan of 30 m, a
double vertical stabilizer on a tubular tail beam and flaps along the entire trailing edge of the wing. It broke up in the air during a
flight of clouds, with Kronfeld being able to save himself with a parachute. In 1935, the Gothaer Waggonfabrik engaged August Küpper to build a reconnaissance aircraft with optimal defensive options to the rear. The result was a strongly swept flying wing high-wing aircraft whose wings were attached to the fuselage with a strong bend. This gave the pilot a good view to the front and up, while the observer had an almost unobstructed field of fire to the side and rear. The Go 147 had a wingspan of 12.25 m and was powered by an Argus As 17a with 200 hp. The control was carried out by Junkers double wings along the entire trailing edge of the wing and
end disc rudder. Flight tests revealed difficult landing characteristics and insufficient course stability. Since the Go 147 had no advantages over normal aircraft in terms of performance, the project was discontinued in 1937.
August Küpper had a fatal accident in 1938 in his own design Ku 7. The Ku 7 was similar to the Austria, but was smaller and had a
central vertical stabilizer