Luckily, there is still one parameter left to compensate for the destabilizing effect of increased camber - it is the location of the maximum camber. Its location has a small influence on the lift vs. drag polar, but a strong impact on the moment coefficient. Below, the moment coefficient vs. the angle of attack for a family of airfoils is shown. The airfoils differ in the location of the maximum camber xc/c.
Influence of the location of the camber (xc/c) on the moment coefficient.
As we can see, moving the location of the maximum camber backwards, also shifts the moment coefficient down towards negative values. Thus it might be advisable, to concentrate the camber in the first quarter of the chord length, if we want to compensate the lift loss (introduced by the reflexed camber line) by an increased amount of camber.
Last modification of this page: 08.09.03
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