508
P. Liu
Fig. 7.81 Thrust of the bird wing
bow wing can generate enough thrust, which allows the bird to climb into
the air and also to carry out various maneuvers (as shown in Fig. 7.81).
So how does a man-made aircraft generate power? Because humans have
difficulty in the manufacture of musculoskeletal joints, they are unable to
generate enough aerodynamic forces, so Kelly proposed to consider power
and lift separately. Separating the power from the lift (as shown in Fig. 7.82)
is equivalent to cutting off the bird’s bow wing, leaving the arm wing to
generate lift. In this way, how can we generate power? Thus, humans invented
the engine to replace the bow wing. The wing only provides lift to balance
the aircraft’s gravity, and the engine only provides thrust to overcome the
aircraft’s drag.
Fig. 7.82 The principle of the aircraft flying forward
P. Liu
Fig. 7.81 Thrust of the bird wing
bow wing can generate enough thrust, which allows the bird to climb into
the air and also to carry out various maneuvers (as shown in Fig. 7.81).
So how does a man-made aircraft generate power? Because humans have
difficulty in the manufacture of musculoskeletal joints, they are unable to
generate enough aerodynamic forces, so Kelly proposed to consider power
and lift separately. Separating the power from the lift (as shown in Fig. 7.82)
is equivalent to cutting off the bird’s bow wing, leaving the arm wing to
generate lift. In this way, how can we generate power? Thus, humans invented
the engine to replace the bow wing. The wing only provides lift to balance
the aircraft’s gravity, and the engine only provides thrust to overcome the
aircraft’s drag.
Fig. 7.82 The principle of the aircraft flying forward