Just to clarify, the reason I am asking the question is that I am building a folding Multihull, and I am using a hull design which is a NACA shape. (65012)



I am intending for the hull to contribute to the lift and so perhaps not need a keel at all.



see www.fourhulls.com



I am not sure I understand the difference between fine entry and sharp leading edge, am I right in saying a fine entry is a shape with the thickest part of the section further back.