7 Flight Mystery and Aerodynamic Principles
501
Fig. 7.69 Wing tip sail (Chinese Y-5)
extreme moments, as long as the drag is reduced a little bit, you can win the
game. Even if the bird is flying with a fish, it will carry the fish in the direction of the airflow (as shown in Fig. 7.71). The geometrical characteristics
of different aircraft fuselages are shown in Figs. 7.72, 7.73, 7.74, 7.75, 7.76,
7.77, 7.78 and 7.79.
7.9 Moment in Stable Flight and Tail
In order to fly stably, in addition to the balance between lift and gravity,
engine thrust and drag, there is also a balance of torque (as shown in
Fig. 7.80). The lift acts on the wing, and the center of gravity of the airplane
501
Fig. 7.69 Wing tip sail (Chinese Y-5)
extreme moments, as long as the drag is reduced a little bit, you can win the
game. Even if the bird is flying with a fish, it will carry the fish in the direction of the airflow (as shown in Fig. 7.71). The geometrical characteristics
of different aircraft fuselages are shown in Figs. 7.72, 7.73, 7.74, 7.75, 7.76,
7.77, 7.78 and 7.79.
7.9 Moment in Stable Flight and Tail
In order to fly stably, in addition to the balance between lift and gravity,
engine thrust and drag, there is also a balance of torque (as shown in
Fig. 7.80). The lift acts on the wing, and the center of gravity of the airplane