The twin-engine DC-3, developed by Douglas Aircraft Company, during the mid-30s, can be defined as a real milestone in the history of civil aviation. Its low-wing configuration, the good engines and the excellent performance makes it one of the most significant transport aircraft ever made and a real revolution in the airline industry. In the civil aviation, a lot of commercial operators and airlines used the American twin-engine to perform short and medium range routes. For instance, Swissair, the national airline of Switzerland, employed in the late '40s and in the '50s, the Dakota. Very soon the aircraft has been appreciate for the high reliability, the low running costs and the good loading capacity.
