Borrowing from nature
The swept back fin keels and rudders drawn by C&C and William Shaw at Pearson and others in the 70s also resembled natural fins of sharks or fish (no tuburcles, though).
The even older, traditional designs before computer assisted design showed similar natural looking curves and overhangs, producing some really beautiful boats (not the rule breakers).
It appears many yacht designers have now moved away from those more natural design features to the more modern, completely vertical keels and rudders, straight sheer, and very little overhang from racing boats.
Last edited by jameswilson29; 10-11-2011 at 12:17 PM.