This section last updated August 31 2005

Photos of hang gliders and models to illustrate how billow contributes to the net geometric anhedral of a swept wing:

Photos of models that illustrate how washout or billow contribute to the net geometric anhedral of a swept wing

Photos of hang gliders that illustrate how billow contributes to the net geometric anhedral of a swept wing

More photos that illustrate how billow contributes to the net geometric anhedral of a swept wing -- views of inverted gliders

Model illustrating the "hinge lines" on a wing with billow

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