The critical parameters for stern flap design geometry are the flap angle, referenced to an extension of the local centerline buttock angle, flap chord length and flap span across the transom.

Flaps, or more properly “trailing edge high lift devices,” have two functions—they increase drag and enable the wing to sustain lift at a lower speed. The purpose of increasing drag is not ...

But the single flap design was discontinued a few years back, meaning that all 2.55 and Classic Flap bags produced now come with a double flap design. The first Chanel Flap Bags were priced at $ ...