High Quality Content by WIKIPEDIA articles! The Douglas DC-5, the least known of the famous DC airliner series, was a 16-22 seat, twin-propeller aircraft intended for shorter routes than the DC-3 or DC-4. However, by the time it entered commercial service in 1940, many airlines were canceling orders; consequently, only five civilian DC-5s were ever built. With the Douglas Aircraft Company already converting to war production, the DC-5 was soon overtaken by events, although a limited number of military variants were produced.