Aeronautic Instruments. Section VI : Aerial Navigation and Navigating Instruments (1923)
NASA Technical Reports Server (NTRS) · leaf 23
irection of the wind? (See fig. 12(\) Lay off on one arm the ground speed 100 miles per hour and turn the arm until it reads 95°, the observed track. Lay off on the other arm, 90 miles per hour, the air speed, and turn this arm until it reads 120°, the compass course. Turn disk until the lines are… … Fig. 12.—Course and distance calculators. toward 31° or from 211°. The speed of the wind is found from the distance between the two indices, in this case about 12 miles per hour. (3) Given the same data as in (1), how long will it take to fly 480 miles'? The proportion used is time required in…
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