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
United Aircraft Corporation The Tu-204 was succeeded by its variant, the Tu-214. The Ilyushin Il-114 is a turboprop, narrow-body regional airliner developed to replace the Antonov An-24, which most were in service of Aeroflot. However, only 20 were built so far, and only two airlines were using it, so the Il-114's production was temporarily ceased. The Sukhoi Superjet 100 is the first airliner and regional jet airliner that is developed and exported under the UAC brand, by which it was developed by Sukhoi Civil Aircraft, a branch of the UAC. The Sukhoi Superjet 100 was designed to compete with the Antonov An-148, Embraer