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 Aerophile, vol. 28, no. 22-23, Nov. 1-15, 1920, pp. 326-332, 17 figs)
Route indicator
Le correcteur de route
Aeronautique ; 2 , n 18
1920
6 pages
23 Figs.
Article (Journal)
French
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