Originally Posted by outbound
Still, there have been modifications applied to full keel boats that improved function such as those using Henry Sheel's work or the keels with a gap in the middle which I recall were done by an englishman who's name escapes me. ..
the Scheel keel that I know is a kind of previous bulbed keel but with a lot of drag.
I guess you are talking about tandem keels? Those are a lot more interesting specially in what regards low draft solutions even if they have been used (without much success) even in top race boats.