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Research Work of the “DVL”

Published online by Cambridge University Press:  28 July 2016

Wilh. Hoff
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Extract

In the later part of autumn last year, I was invited by your President, Colonel the Master of Sempill, to read a paper about the work of the “ Deutsche Versuchsanstalt fur Luftfahrt ”( i.e. “ German Aeronautical Research Institute ” ) . The Royal Aeronautical Society can look back to a long and successful development. Your Society has always aimed at the promoting of the technical work of your country and at the fostering of close scientific relations between air–minded countries. It is therefore a great honour for me to lecture before your Society.

I regard co–operation in discussing areonautical matters between the various countries as very necessary. Representatives of aeronautical science have, during the past year, held international congresses at Stockholm, in the Hague and finally in Paris. Common problems were treated at these congresses by the representatives. New personal relations were formed during the meetings held there.

Type
Proceedings
Information
The Aeronautical Journal , Volume 35 , Issue 249 , September 1931 , pp. 771 - 816
Copyright
Copyright © Royal Aeronautical Society 1931

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References

Note on page 811 1 In a description by Pritschow, “Zeitschrift des Vereines Deutscher Ingenieure,” Bd. 69, S. 700, “Ein optisches Gerät zur Beobachtung umlaufender Teile in scheinbarer Ruhe (Rotoskop),” a reference is to be found, that this method is described in 1891 in the French paper “ La Nature,” S. 241, under the title “Le Cyclostat.”

Note on page 812 2 The method of computing is published in “Luftfahrt-Forschung,” 7. Band, No. 3 (1930) : F. Liebers, “ Resonanzschwingungen von Luftschrauben.” The report “Ueber Schwingungserscheinungen an Luftschrauben” (Zeitschrift fur Flugtechnik and Motorluftschiffahrt 1931, No. 12, of Mr. Seewald gives a survey over the actual condition of research turned out by the DVL).

Note on page 813 3 The values measured by the DVL will be published in a report of Mr. H. Hertel “Dynamische Festigkeitsprüfng” (dynamic strength test) in the yearbook 1931 of the DVL.

Note on page 814 4 I refer to the report being published in the yearbook 1931 of the DVL bei H. G. Kiissner: ” Beanspruchung von Flugzeugfliigeln durch Böen “ (Aeroplane wing load by gusts).

Note on page 814 5 The results of tests with DVL brakes will be published in the yearbook 1931 of the DVL by F. Michael: “Versuche mit Flugzeugbremsen” (tests with aeroplane brakes).

Note on page 814 6 The measuring installation for the recording of fast current pressure phenomena is described by Kurt Schnauffer in “Luftfahrt–Forschung” Vol. 6, pag. 126…. Kurt Schnauffer reports an application of this method for the exploring of knocking in Otto–cycle engines in “Zeitschr. des Vereines Deutschen Ingenieure,” 1931, No. 15, pag. 451.

Note on page 815 7 Furnished by Th. Goldschmidt A. G., Essen.

Note on page 816 8 See F. Eisner, G. Sudeck, R. Schröer and O. Zinke, Luftfahrt–Forschung, Vol. 8 (1930), pag. 141.

Note on page 816 9 These questions are treated by Wilhelm Schmidt in a paper which will soon be published about: Beitrag zur Entwicklung eines autorotationsfreien, steil landbaren Flugzeugs.