The Probert Encyclopaedia of Aircraft

DC-1

The Douglas DC-1 was a low-wing, all-metal monoplane commercial airliner which first flew on July 1, 1933. It was powered Two Wright Cyclone 710 hp engines carried fourteen passengers at a speed of 180 mph. It never entered commercial service, despite being bought by TWA, being replaced by the DC-2.
Research DC-1