7 Flight Mystery and Aerodynamic Principles
519
Fig. 7.98 Swan and fighter takeoff
cruising speed. Under normal circumstances, the takeoff and landing speed of
large airliner is about 220–240 km/h, and the cruising speed can reach 800–
900 km/h. The speed ratio of the two is nearly 3 to 4. In order to achieve
the above behavior, the active surfaces of the front and rear edges of the wing
are called high-lift devices. The design techniques of these movable surfaces
are called low-speed configuration design technology in aircraft wing design,
which is one of the most important core technologies in aircraft wing design
and one of the important core technologies is also one of the hotspots of
aerodynamic research, involving almost all the complex problems of modern
viscous fluid mechanics.
Careful observation of the bird’s takeoff method reveals that in addition to
the takeoff roll, there are also high platform gliding takeoff, ground bounce
takeoff, etc. For example, pigeons often take off by bouncing. When the
pigeon wants to take off, the two legs are struggling to bounce off the body,
519
Fig. 7.98 Swan and fighter takeoff
cruising speed. Under normal circumstances, the takeoff and landing speed of
large airliner is about 220–240 km/h, and the cruising speed can reach 800–
900 km/h. The speed ratio of the two is nearly 3 to 4. In order to achieve
the above behavior, the active surfaces of the front and rear edges of the wing
are called high-lift devices. The design techniques of these movable surfaces
are called low-speed configuration design technology in aircraft wing design,
which is one of the most important core technologies in aircraft wing design
and one of the important core technologies is also one of the hotspots of
aerodynamic research, involving almost all the complex problems of modern
viscous fluid mechanics.
Careful observation of the bird’s takeoff method reveals that in addition to
the takeoff roll, there are also high platform gliding takeoff, ground bounce
takeoff, etc. For example, pigeons often take off by bouncing. When the
pigeon wants to take off, the two legs are struggling to bounce off the body,