United Airlines Boeing B-377 N31226 CN 15966 Stratocruiser . Taken On June 23 , 1956 . Editorial Image

United Airlines was one of the last U.S. airlines to provide air travel services with the Boeing 377 Stratocruisers. About the Stratocruiser:After World War II was over, Boeing re-entered the commercial market with a new long-range airliner, the Stratocruiser (Model 377). It was the first Boeing commercial transport since the Stratoliner and, like its military counterpart, the C-97, was based on the B-29 bomber. It possessed all the speed and technical improvements available to bombers at the end of the war.Boeing built 56 Stratocruisers between 1947 and 1950, and they marked the company’s first significant success selling passenger planes to airlines in other countries.