As the wing rises the angle of attack decreases and causes the lift coefficient to increase further towards the maximum lift coefficient.
22.
Ornithopters with thinner wings have a limited angle of attack but provide optimum minimum-drag performance for a single lift coefficient.
23.
In this case, the wing can be flown at higher lift coefficient ( closer to stall ) to produce more overall lift.
24.
Suction side surface cavitation forms when the propeller is operating at high rotational speeds or under heavy load ( high blade lift coefficient ).
25.
As the wing descends the angle of attack increases, which causes the lift coefficient to decrease and the angle of attack to increase.
26.
The wing may thus be used up to its maximum lift coefficient, an advantage that may translate into a reduction of its area and weight.
27.
Together, these high-lift devices produced a maximum wing lift coefficient of 3.0 ( based on the flap-retracted wing area ).
28.
The lift coefficient can be approximated using the lifting-line theory, numerically calculated or measured in a wind tunnel test of a complete aircraft configuration.
29.
The angle at which maximum lift coefficient occurs is the stall angle of the airfoil, which is approximately 10 to 15 degrees on a typical airfoil.
30.
Therefore, the most common way in which pitch stability can be achieved is to increase the lift coefficient ( so the wing loading ) of the canard.
