516
P. Liu
Fig. 7.92 American C130 propeller transporter
Fig. 7.93 Airbus A320 airliner (large bypass ratio turbofan engine)
70%. It can be seen that, for the sake of safety, the airworthiness regulations are that passengers are not allowed to walk around when taking off and
landing, and the seat belt must be fastened.
In addition to the takeoff state, the change in the shape of the wing when
the bird is landing is also the object of imitation. When the eagle is landing
(as shown in Fig. 7.99), the feathers of its wings expand as much as possible.
Compared with the shape of the wing in the soaring state, not only the area
is enlarged, but also the degree of feather bending is increased. Why? Because
P. Liu
Fig. 7.92 American C130 propeller transporter
Fig. 7.93 Airbus A320 airliner (large bypass ratio turbofan engine)
70%. It can be seen that, for the sake of safety, the airworthiness regulations are that passengers are not allowed to walk around when taking off and
landing, and the seat belt must be fastened.
In addition to the takeoff state, the change in the shape of the wing when
the bird is landing is also the object of imitation. When the eagle is landing
(as shown in Fig. 7.99), the feathers of its wings expand as much as possible.
Compared with the shape of the wing in the soaring state, not only the area
is enlarged, but also the degree of feather bending is increased. Why? Because