Following numerous crashes the aircraft was re-designed with oval windows and re-introduced as the Mk2 Comet in 1958, however the Boeing 707 had already been introduced and had become a great success. Sales of the de Havilland Comet were adversely affected by it's early history and never realised it's maximum potential as the worlds first jet air liner, however it still remained in use until 1997 and enjoyed a good reliability and safety record from the introduction of the Comet Mk2 in 1958. The Comet was used in various support roles by the RAF and eventually used as the basis for the RAF's Hawker Siddeley Nimrod Maritime Patrol aircraft. de Havilland Comet 4 Specifications: - Crew: Two pilots, flight engineer and radio operator/navigator
- Capacity: 56–81 passengers
- Length: 111 ft 6 in (33.99 m)
- Wingspan: 114 ft 10 in (35.00 m)
- Height: 29 ft 6 in (8.99 m)
- Empty weight: 75,400 lb (34,200 kg)
- Maximum takeoff weight: 162,000 lb (73,5000 kg)
- Engines: Four 10,500 lbf (46.8 kN) Rolls-Royce Avon Mk 524 turbojets
- Maximum speed: 526 mph (457 knots, 846 km/h)
- Maximum Range: 3,225 mi (2,800 nmi, 5,190 km)
- Service ceiling: 42,000 ft[136] (12,800 m)
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