Boeing 247
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 & 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.