Since the lift distribution is nearly elliptical, the chord distribution should be nearly elliptical for uniform C l 's. Evaluating the stalling characteristics is not so easy. Twist The wing twist distribution is perhaps the least controversial design parameter to be selected. The twist must be chosen so that the cruise drag is not excessive. Extra washout helps the stalling characteristics and improves the induced drag at higher C L 's for wings with additional load distributions too highly weighted at the tips.
Twist also changes the structural weight by modifying the moment distribution over the wing.
Twist on swept-back wings also produces a positive pitching moment which has a small effect on trimmed drag. The selection of wing twist is therefore accomplished by examining the trades between cruise drag, drag in second segment climb, and the wing structural weight. The selected washout is then just a bit higher to improve stall.