Airway mileage by scheduled air transports in United States has increased from total of 2,000,000 mi flown in 1936 to 90,000,000 in 1939; air passenger miles in 1938 aggregated 600,000,000; review of technical developments in aircraft and improvements in airway operation which have made possible this phenomenal growth.
Trend of air transportation
Am Soc Mech Engrs -- Advance Paper
American Society of Mechanical Engineers -- Meetings ; 1939 United States
1939
10 pages
Aufsatz (Konferenz)
Englisch
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