A 3-d wing is considered to have 100% leading-edgesuction when the Oswald efficiency factor (e) exactly equals 1.0.
而对于三维机翼来说，当奥斯瓦德有效因数等于1.0时，可认为有100%的前缘吸力。
2
Thus, in the worst case of zero leading-edgesuction, the drag-due-to-lift factor K is simply the inverse of the slope of the life curve (in radians), as previously determined.
因此，零前缘吸力的最坏情况是：由升力引起的阻力系数K是前面确定的升力曲线斜率的倒数（弧度制）。
3
The effect of density ratio on suction surface and leadingedge is more evident.