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
1958 London Vickers Viking accident 1958 London Vickers Viking accident The London Vickers Viking accident occurred on 2 September 1958 when an Independent Air Travel Vickers VC.1 Viking (registration "G-AIJE"), loaded with two Bristol Proteus turboprop engines as cargo, and with three crew members aboard, attempted a flight from London Heathrow Airport to Tel Aviv via Nice, Brindisi and Athens. The aircraft took off from Heathrow at 05:54 Greenwich Mean Time (GMT) but 15 minutes after take off the flight crew reported engine problems and requested a return to Blackbushe Airport. The crew was cleared by Air Traffic Control to descend to 3000 feet, but