The TriStar was Lockheed's first wide bodied airliner a total of 250 were made between 1968-1984, a variant was modified by Marshall of Cambridge from civilian airliners for the RAF as an air-to-air tanker and transport aircraft, a total of nine were modified as a replacement for the RAF's aging Handley-Page Victor tanker aircraft in the aftermath on the Falklands conflict. Lockheed Tristar K1 Specifications: Crew: 3 Length: 50.05 m (164 ft 3 in) Wingspan: 50.09 m (164 ft 4 in) Height: 16.87 m (55 ft 4 in) Wing area: 329.0 m² (3540 ft²) Empty weight: 105,165 kg (242,684 lb) Max takeoff weight: 245,000 kg (540,000 lb) Engines: Three 50,000 lbf (222.4 kN) Rolls-Royce RB.211-524B turbofans Maximum Fuel Load: 136,080 kg (300,000 lb) Maximum speed: Mach 0.90 Cruise speed: Mach 0.83 (483 kn, 894 km/h) Range: 4,200 nmi (7,785 km) Service ceiling: 43,000 ft (13,000 m)
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