Description of derivograph, an apparatus which indicates direction, corrected for wind, to follow in order to reach a certain place by flight in a straight line. (See also Aeronautique vol. 2, no. 18, Dec. 1920 pp. 227-232, 23 figs)
Route indicator
Le correcteur de route
Aerophile ; 28 , n 22-23
1920
7 pages
17 Figs.
Article (Journal)
French
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Engineering Index Backfile | 1920
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