Guys please make a distinction between a sharp leading edge and a fine entry or, less-correctly, a sharp bow.



These two things are independent of eachother a blunt bow can still have a sharp leading edge which according to that book can be draggy and a sharp bow can still have a blunt leading edge.



I think the thread started with a question regarding the talk of sharp bows. Like the change from the plumb Inter 18 to the fine entry bow of the Nacra F18. The last is a better cutter and performs better in chop. It also is intended to create a smaller bow wave. The first makes the boat less sensitive to weight placing and helps to reduce pitchpole tendency in the first stages of a dive. The fine entry also caused less rocking of the boat in waves; also indentified by confusion describtion of "wave piercing" bow.



With regard to leading edges to comments about too blunt or to sharp are correct although a hull is nowhere near to a NACA shape and will behave differently as a result.



Wouter