Douglas DC-8-33 Wallpapers

Douglas DC-8-33 Aircraft - photo wallpapers; Megawallpapers.org : The Douglas DC-8 is a four-engined jet airliner, manufactured between 1959 and 1972. The DC-8-63 remains to this day the largest narrowbody subsonic airliner ever built. At the time that the world's first jet airliner, the De Havilland Comet, was introduced in 1949, Douglas held a commanding position in the aircraft market. Although Boeing had pointed the way to the modern all-metal airliner in 1933 with the 247, [br]it was Douglas that, more than any other company, made the promise a [br]reality. Douglas produced a succession of piston-engined commercial [br]aircraft through the '30s, '40s and '50s: 138 DC-2s, 10,928 DC-3s (mostly for military service in World War II), 1453 DC-4s, 537 DC-6s and 226 DC-7s. Given the success of their designs, Douglas took the view that there [br]was no reason to rush into anything new, as did their rivals Lockheed and Convair. [br]Most air transport manufacturers expected that there would be a gradual [br]switch, from piston engines to turbines and that it would be to the [br]more fuel-efficient turboprop engines rather than pure jets. In contrast, Boeing took the bold step of starting to plan a pure jet airliner as early as 1949. Boeing's military arm had gained extensive experience with large, long-range jets through the B-47 Stratojet (first flight 1947) and the B-52 Stratofortress (1952). With thousands of their big jet bombers on order or in service, Boeing had developed a close relationship with the U.S. Air Force Strategic Air Command (SAC), and could count on having preference when the time came to replace SAC's fleet of piston-engined KC-97 Stratotankers. For Boeing, this was a golden opportunity: an aircraft built to provide air-to-air refueling [br]capacity for strategic bombers could be turned into a commercial [br]transport with very little extra effort. Boeing could now plan on [br]building a commercial jetliner — which might or might not sell — but [br]either way the Air Force would pay for most of the development cost. De Havilland's pioneering Comet entered airline service in 1952. Initially it was a success, but a series of fatal crashes in 1953 and 1954 [br]resulted in the type being grounded until the cause could be [br]discovered. Airlines cancelled orders for it, public confidence in the [br]idea of jet transport plummeted, and it would take de Havilland four [br]years to find and fix the problem. In fact, the cause of the Comet [br]crashes was nothing to do with jet engines as such: it was rapid metal fatigue [br]brought on by the stress of cycling a pressurised cabin to high [br]altitudes and back rapidly. The harsh lesson of the Comet disasters was [br]inevitable, but the new understanding of metal fatigue that the Comet [br]investigation produced would play a vital part in the good safety [br]record of later types like the DC-8. [br]Country of origin: USA [br]_________________________________________________________________________________________________ [br]Engines: four Pratt & Whitney JT43A turbojets of 7167 kg (15,800lb) thrust each [br]_________________________________________________________________________________________________ [br]Wingspan: 43.41 m (142ft 5in) [br]_________________________________________________________________________________________________ [br]Lenght: 45.87 m (150ft 6in) [br]_________________________________________________________________________________________________ [br]Height: 13.21 m (43ft 4in) [br]_________________________________________________________________________________________________ [br]Weight loaded: 125,192 kg (276,000lb) [br]_________________________________________________________________________________________________ [br]Cruising speed: 964 km/h (599mph) at 9144 m (30,000ft) [br]_________________________________________________________________________________________________ [br]Service celling: 13,800 m (45,300ft) [br]_________________________________________________________________________________________________ [br]Range: 7500 km (4660 miles) [br]_________________________________________________________________________________________________ [br]Passengers + crew: 105-118 + 4 [br]_________________________________________________________________________________________________

Douglas DC-8-33 Gallery:

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Douglas DC-8-33 Wallpapers @ Mega Wallpapers (08 Edition)
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