7 Flight Mystery and Aerodynamic Principles
533
Fig. 7.119 B787 lifting device
Fig. 7.120 B787 lifting device
Similarly, after the plane leaves the ground, the landing gear is first
retracted. If the landing gear is not retracted, the drag of the plane will be
great, the plane cannot fly fast. In addition, the airflow is also very noisy.
Sitting in the cabin of the plane, it is not quiet at all.
Since the landing gear of the aircraft mainly bears the impact load and
gravity when the aircraft is landing (as shown in Fig. 7.129), it is required to
533
Fig. 7.119 B787 lifting device
Fig. 7.120 B787 lifting device
Similarly, after the plane leaves the ground, the landing gear is first
retracted. If the landing gear is not retracted, the drag of the plane will be
great, the plane cannot fly fast. In addition, the airflow is also very noisy.
Sitting in the cabin of the plane, it is not quiet at all.
Since the landing gear of the aircraft mainly bears the impact load and
gravity when the aircraft is landing (as shown in Fig. 7.129), it is required to