Yacht Design School – Lesson 4b

Theory & Practice of Developing Excellence in Hull Lines – Section Shape Considerations, Fairing, and Hull Resistance Reduction

Revised 03/21/2006 – Copyright 2006

Books To Be Read With This Lesson

            Aero-Hydrodynamics of Sailing by C.A. Marchaj

            Theory of Wing Sections by Ira H. Abbott and Albert E. Von Doenhoff (highly optional)

            Modern Subsonic Aerodynamics by R.T. Jones (highly optional)           

Minimum New Tools for This Lesson

What You Will Receive With This Lesson

What You Will Learn In This Lesson

Section Shape and Initial Stability

Designing Chines to Avoid Cross Flow

Underbody Smoothness

Turbulence

Wetted Surface

Flow at or Near the Water Surface Versus Submerged Flow

Modeling Flow Over Surface Piercing and Near Surface Bodies

Fully Immersed Streamline Flow

Evaluation of Drag on Fully Submerged Streamlined Bodies

Proper Construction of Streamlined Bodies

Variable Prismatic Coefficient for Low to High Speeds as Boat Changes Trim