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Fig. 7.109 B737 large airliner lifting device (trailing edge)
Fig. 7.110 Trailing edge lifting device mechanisms and constraints
quickly. This reminds people that the landing gear of a man-made aircraft
should also be retracted after the aircraft is lifted off. The speed of the early
aircraft was relatively small. For the sake of simplicity, the landing gear was
often not retracted, so the landing gear of the early aircraft would not be
retracted. Modern aircraft landing gear is retractable. For the A380 airliner, it