[aerohead]

Originally Posted by Otto

You would enjoy reading Dr. Heinrich Hertel's "Structure, Form, Movement" book, which looks to Nature for elegant engineering solutions.

The fastest swimming fishes (i.e., tuna, shark, etc.) have max thickness at 44.22% of length, for optimal streamlining. Otherwise, they don't get breakfast, but are breakfast. They've had, oh, ~65 million years to work on it. We do well to listen to Nature.

Nature never made a Kamm back because the tail is where the propulsion comes from. Besides, a fish tail is no fun while parking or in traffic.

Thanks Otto! I wrote the title and author info,and will try and run down a copy of the book.He may be the resource used by others when making claims about aero/hydro efficiency in the animal kingdom.Thanks again,Phil.