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Scheel Keel
The Scheel keel is a patented form of a bulb keel. The top of the keel is shaped to create an end plate effect reducing tip vortex and improving the hydrodynamic effiency of the shortened keel span. The bottom of a sheel keel is rounded to reduce wetted surface and associated drag. The bulb allows the center of gravity to be lowered.
In testing they are clearly not as efficient as a deep draft fin keel but are also clearly more efficient than the typical shoal draft keel or shoal draft keel with a bulb.
Jeff
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