Details of Alexanderson radio altitude indicator and magnetic compass given in papers presented by E. F. W. Alexanderson and J. D. Tear, respectively, before National Academy of Sciences; new method of measuring height above ground of plane in flight, using high-frequency radio transmission and reception; in magnetic compass, bar of permalloy is held constantly in horizontal position by means of pendulum which hangs vertically, irrespective of angle at which airplane may be flying.
Airport and airway
Aero Digest
Aero Digest ; 14 , n 1
1929
2 Figs.
Article (Journal)
English
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Engineering Index Backfile | 1928
|Engineering Index Backfile | 1928
|Airway and airport illumination
Engineering Index Backfile | 1928
|Engineering Index Backfile | 1929
Engineering Index Backfile | 1928