Principles of acoustic altimetry; design and operation of Behm acoustic sounding device; ground and flight tests; mean error of plus 11.4 ft. for acoustic method in adverse weather conditions. (See also Jahrbuch der Deutschen Versuchsanstalt fuer Luftfahrt E. V. 1930 pp. 483-490, 9 figs.)
Behm altimeter for airplanes and its accuracy
Das Behmlot fuer Flugzeuge und die mit ihm erzielte Genauigkeit
1930
18 pages
12 Figs.
Article (Journal)
English
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