Yacht Design School – Lesson 4c

Theory & Practice of Developing Excellence in Hull Lines – Appendage Development and Fairing & Final Considerations in Developing Lines

Revised 03/24/2006 – 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

            When Fillets Are Good and When They Are Not – A Subject of Controversy

            “Appropriate or Inappropriate” Versus “Modern or Old Fashioned” Characteristics

            Avoiding Foreign Object Drag in Bulb Keels

            Intersection of Bulbs with Keels and Struts

            Avoiding Drag in SWATH Hull Bulbs

            Ultimate Result in Dealing with Bulb Problems

            Bulbous Bows

            Foil Lift Versus Vortex Lift

            Choosing Spade Rudders, Skeg Hung Rudders, or Keel Hung Rudders Rationally

            Avoidance of Laminar Flow Foils in Non-Dry Sailed Yachts

            Avoidance of Laminar Flow Foils in Rudders

            Mistake of Picking One Factor in Speed Production and Emphasizing It Beyond Reason

            Distortions Introduced by the Racing Rules

            Why We Devote So Many Lessons to Lines Characteristics

Back to School Page