Two procedures for calculating the lift distribution along the span are given, in which better account is taken of the distribution of circulation over the area than in the Prandtl lifting-line theory. The methods are also applicable to wings with sweepback. Calculated results according to two methods agree excellently. The results are compared with those of the Multhopp method and with experimental results. Finally, there is a brief note on the swept-back wing in sideslip.
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