The Behm acoustic sounder for aircraft enables the barometric determination for the altitude by night or fog and therefore promises to prove of great importance in safeguarding air traffic.
Behm Acoustic Sounder for Aircraft
1926-01-01
Miscellaneous
No indication
English
Behm acoustic sounder for aircraft
Engineering Index Backfile | 1926
Engineering Index Backfile | 1922
|Behm altimeter for airplanes and its accuracy
Engineering Index Backfile | 1930
|Behm altimeter for airplanes and its accuracy
Engineering Index Backfile | 1930
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