Design Features of Both
Unlike that aircraft, however whose five basic versions had shared the same fuselage length and cross-section the projected successor of had featured a fuselage stretch capable of accommodating mixed-class air diffuser, three General Electric urbofans producing pounds of thrust each, a strengthened wing, and a pound gross weight. The resultant paralleling the earlier, stretched, long-range series, had offered a passenger increase over the of Air New Zealand and Swissair who had been targeted as potential launch customers, but use of the existing wing had severely eroded performance, and five-foot extensions, coupled with a new wing fillet and active ailerons to reduce gust fan coil unit, had considerably improved it. Indeed, revised trailing edge flaps and a larger tailcone had resulted in a percent fuel reduction over that of the and its seat-mile costs had been lower than those of the four-engined Boeing. Program launch, intended for had been usurped by Douglas's further definition of its versions, which, designated and had even more closely reflected the and nomenclatures. The for instance, had been intended as a domestic variant with the fuselage stretch and a passenger capacity, and had been powered by thrust-pound engines. The with a reduced, fuselage fan coils, had been intended for very long-range operations, with a wingspan increase, active ailerons, and a four-wheeled centerline main undercarriage unit. It had been intended to carry some fewer passengers than the while the had combined the design features of both, resulting in a high-capacity, long-range variant. A series of intermittent accidents, none of which had been traced to an inherent design flaw, along with the prevailing economic recession, had precluded further Super development at this time, although one of its features, eventually incorporated in its successor, had been on a Continental Airlines in August of. Winglets, extending both above and below the wing tip, and varying in size, had resulted in a three-percent fuel reduction because of an equal decrease in generated drag.