the first 60 247s were sold to boeing air transport (part of the united aircraft and transport corporation, uatc). they cost $65,000 each. twa (transcontinental &amp; western air) also ordered the 247 but uatc said no. twa president jack frye asked for a new airliner. he paid don douglas to design and build the douglas dc-1 prototype. douglas eventually made the dc-3 line.