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
Canadian Vickers Vigil Canadian Vickers Vigil The Canadian Vickers Vigil was a single-seat patrol aircraft designed to meet a Royal Canadian Air Force requirement for a forest fire patrol aircraft. In 1926, the RCAF issued specifications for an aircraft to replace the Airco DH.4 aircraft used at the time. Canadian Vickers designed the Vigil which had steel-structured wings with aluminum skin throughout, and was a strut-braced sesquiplane. The aircraft was overweight, which impacted the aircraft service ceiling and performance, which in turn made it unsuitable for its role. Only one was ever built. Unfit for its intended role, the aircraft was sent to