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48-49 ARMY AIR FORCES (9) A pilot flying an airplane which has an air speed of 200 mph takes off from field A to fly to field B which lies 800 miles and 315° from field A. A wind of 30 mph is blowing from 0°. The pilot miscalculates his course and lands at field C to get his bearing. C is 565 miles from both A and B, and is due north of A, and due east from B. How much time did he lose by not flying a direct line? 49. Miscellaneous exercises.-(1) If an airplane with an air speed of 160 mph and a heading of 312° flies in a 35-mph wind from 20°, what are the track and ground speed? (2) An airplane with an air speed of 135 mph must fly a course of 93° in a 30-mph wind from 225°. What must be the heading, and what will the ground speed be? H=102°; GS=153 Answer. (3) An airplane's heading is 35°. A 25-mph wind is blowing 95°. If the airplane's air speed is 120 mph, what are its ground speed and track? (4) An airplane's air speed is 210 mph. A 45-mph wind is blowing 195°. If the airplane must fly a course of 248°, what must the heading be and what will the ground speed be? H=238°; GS=180 Answer. (5) An airplane must fly a 75° course and maintain a ground speed of 165 mph. A 40-mph wind is blowing from 160°. What must the air speed and heading be? (6) In a 30-mph wind from 350°, an airplane flies with a heading of 235° and an air speed of 170 mph. What are the track and ground speed? T=226°; GS=185 Answer. (7) An airplane must fly a 23° course in a 25-mph wind from 272°. If the airplane's air speed is 140 mph, what must the heading be? What will the ground speed be? (8) An airplane must fly from A to B in 4 hours 30 minutes. These fields are 630 miles apart and the direction of the line between them is 210°. If the wind is 32 mph from 105°, what must the heading and air speed be? H=196°; AS=136 Answer. (9) An airplane with an air speed of 135 mph and a heading of 355° passes over a landmark, and 1 hour and 20 minutes later passes over another which is 200 miles and 10° from the other. What is the wind velocity? (10) An airplane with an air speed of 170 mph and a heading of 177° flies directly over a road the direction of which is 165°. The pilot sees smoke blowing from a chimney from 275°. What are the ground speed and wind speed? GS=178; WS=37 Answer. (11) An airplane with an air speed of 190 mph must fly along a course of 310° and return along the same line. Total flying time is 78