Regional airliner were replaced by progressively longer-range designs. In the immediate post-war era these were typically Douglas DC-3s, although even the De Havilland Dragon Rapide biplane airliner remained in service for some time. This "hand-me-down" process of supplying aircraft continued with designs like the Convair 440, Douglas DC-6 and Vickers Viscount also serving in this role while the first jets were introduced. By the mid-1950s, demand for even more economical designs led to the production of the first custom feederliners. These were almost always turboprops, which had fuel economy on par with piston engine designs, but had far lower maintenance costs. Often
British Aircraft Corporation operational today as Bristol Cars. Most of the BAC designs were taken over from the individual companies that formed it. BAC did not apply its new identity retrospectively, hence the VC10 remained the Vickers VC10. Instead the company applied its name to marketing initiatives, the VC10 advertising carried the name "Vickers-Armstrongs (Aircraft) Limited, a member company of the British Aircraft Corporation". The first model to bear the BAC name was the BAC One-Eleven (BAC 1–11), a Hunting Aircraft study, in 1961. Bristol had eschewed the subsonic airliner market and was working on the Bristol 223 supersonic transport, which was eventually