Research and Development of

Impulsive Ducts in Germany

 BIOS 1777



Investigated and Reported upon


A.K. Oppenheim, Ph.D., D.I.C


B.I.O.S. Target Nos:

C26/447, C26/450, C26/452, C26/448, C26/457, C26/449

BIOS TRIP No. 2445


Keywords:    Development of the duct under the Luftfahrtministerium; Work of Paul Schmidt; Research work at Stuttgart; Research work by Schmidding; Theoretical aspects; Professor O.A. Saunders, gas column and intermediate combustion; buzz bomb motor, aero- or hydro-pulse motor cover a varierty of patents, ... V1 flying bomb this adaptation of the impulsive duct was designatted AS 014 in Germany, or FZG 76 in Great Britain (and in Germany too! AOB); German research work on impulsive ducts was confined to the following centres:-

Argus Aeroengines Berlin under Dr.-Ing. G. Diedrich ..

Munich - where the original inventor Ing. Paul Schmidt worked

Engine Research Institute, Technical University of Stuttgart, where research woirk on model impulsive ducts was carried out under Professor Kamm. The firm of Alfred Kärcher! (Winnenden, near Stuttgart) collaborated

Schmidding Werke, Schmiedeberg, near Riesenberg, Schlesien - investigations sponsored by Schmidding. The firm of Klockner-Humboldt-Deutz A.G. collaborated

Although by the end of the war the development of fundamental principles was well advanced (flying bomb engines were in production), it was considered that they were not completely understood. Up to that time calculations were largely empirical, and based on experimental data, so, in order to carry out more detailed investigation, a special committee of scientists was formed. The work of this committee is described in section VII

Dr.-Ing. Diedrich started his research work on impulsive ducts at Argus .. in November 1939 ...

Aero-resonators ... The first impulsive duct was constructed in 1939 design details ...

As a result of collaboration with P. Schmidt further impulsive duct development occured. In 1940 a non-resonator burner type ...

Fiesler Zelle (construction of the V.1 plane designed by Ing. Lüsser, Askania (steering and control gear) Wankel V.W. test of spring valves ... L.F.A. Volkerode .. Ainring ..

Wind tunnel tests by Dr. Zobel at L.F.A. Volkerode ..

It was plannedby the Luftfahrtministerium to set up a basic research establishment at Ainring, under the direction of Professor Georgii ...

At the same time ... Professor Bechert and Dr. Marx of Giessen (theoretical work)

Schmidt's early inventions ... 1928 ... By the end of 1929 he had applied for a patent for a thrust generator ... Patent DE523655 ... contained the first sketch of an impulsive duct. The working ccycle may be described as follows .... Schmidt-Rohr ..

Fundamentals, computations and pprospects ...

Research at Stuttgart ... Alfred Kärcher!! under the direction of Prof. Kamm who collaborated with Schmidt ...

Dr. Schwürle and Elwert on behalf of Schmidding ... Dr. Richard Brandt ...

Rapid combustion - Slow combustion Constant pressure combustion ..

Dr. Hummel Professor O. Lutz (L.F.A. Volkerode ..

Professor Sauer and Professor Schultz-Grünow  Riemann theory ..

I would like to suggest, read it carefully yourself!