Editing Boeing 747 (section)

==== 747 trijet ====
During the late 1960s and early 1970s, Boeing studied the development of a shorter 747 with [[trijet|three engines]], to compete with the smaller Lockheed L-1011 TriStar and McDonnell Douglas DC-10. The center engine would have been fitted in the tail with an [[S-duct]] intake similar to the L-1011's. Overall, the 747 trijet would have had more payload, range, and passenger capacity than either of the two other aircraft. However, engineering studies showed that a major redesign of the 747 wing would be necessary. Maintaining the same 747 handling characteristics would be important to minimize pilot retraining. Boeing decided instead to pursue a shortened four-engine 747, resulting in the 747SP.<ref>Jenkins 2000, pp. 69–71.</ref>