Design and Development
The Ministry of Aircraft Production ordered three prototype Wellington Transport Aircraft to Air Ministry Specification 17/44 from Vickers-Armstrongs Limited. The specification was for a peacetime requirement for a medium-short haul passenger aircraft. To speed development the aircraft used the wing and undercarriage design from the Wellington but the fuselage was new. Although the original contract referred to Wellington Transport Aircraft, on completion, the name Viking was chosen.
The prototype (designated the Type 491 and registered G-AGOK) was built by the Vickers Experimental Department at its war-time Foxwarren dispersal site and was first flown by 'Mutt' Summers at Wisley Airfield on 22 June 1945. This aircraft crashed on 23 April 1946 due to a double engine failure; no fatalities occurred as a result of the crash. Following successful trials of the three prototypes the British Overseas Airways Corporation (BOAC) ordered 19 aircraft. The first BOAC aircraft flew on 23 March 1946. The prototypes were then used for trials with the Royal Air Force which lead to orders for military versions (the Viking C2 (12 ordered as freighter/transports) and modified Valetta C1).
The initial 19 production aircraft (later designated the Viking 1A) carried 21 passengers, they had metal fuselages and fabric-clad geodetic wings and tail units. Following feedback from customers, the next 14 examples, known as the Viking 1, featured stressed-metal wings and tail units. The next variant, the Viking 1B, was 28 in (71 cm) longer, carrying 24 passengers with up-rated Bristol Hercules piston engines, achieved a production run of 115. One of this batch was changed during production to be fitted with two Rolls-Royce Nene turbojet engines and upon its first flight on 6 April 1948 became the world's first entirely jet-powered airliner (albeit only a prototype). The Type 618 Nene-Viking flew Heathrow-Paris on the anniversary of Blériot's crossing of the Channel, 1948 taking only 34 minutes (c.210 mi/340 km, 370.6 mph/596.4 km/h). Some six years later, it was converted to a piston engined Viking.
Production finished in 1948, including 16 for the RAF and the King's Flight, but in 1952 BEA adapted some to a 38-passenger layout, taking the maximum payload up from 5,500-7,200 lb (2,500-3,300 kg). All Vikings featured a tailwheel undercarriage.
The 158th Viking became the prototype of the military Valetta, of which 261 were sold. When production of this strengthened but externally-similar type ended in 1951, a flying classroom version with tricycle undercarriage was already being delivered to the Royal Air Force (RAF), called the Varsity. All but one of those entered RAF service, the other example going to the Swedish Air Force. The production of 161 Varsities kept the Hurn works busy until January 1954, and they enjoyed a long service life. Examples are preserved at Brooklands Museum, the Imperial War Museum Duxford and the Newark Air Museum.
Read more about this topic: Vickers VC.1 Viking
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