OCR Text |
Show Airplane Dusting A ground duster traveling five miles an hour, applying 20 pounds of dust to the acre in a swath 23 feet wide, covers 1 28 acres a minute min-ute and so must distribute 5 80 pounds of dust a minute. If the airplane air-plane travels 60 miles an hour, covers cov-ers a swath cf 35 feet and applies iO pounds of dust an acre, its equip merit must treat 4.24 acres a minute min-ute with 84.00 pounds of dust. Speeding up to 85 miles an hour, it must feed and disperse 120.2 pounds r dust over 6.01 acres in a minute, or the dust must be handled at two pounds every second 21.48 times as fast as In the ground machine. |