Principles of Yacht Design

by Lars Larsson, Rolf Eliasson

Overview

"This book is deeply fascinating...a must." -- Classic Boat

Principles of Yacht Design is the authority on planning and creating your desired yacht. Inside you will find all the essentials, including:

• Design methodology and considerations
• The yacht's specifications
• Hull geometry, including lines plans and computer aided design (CAD)
• Hydrostatics and stability in waves and calm
• Hull design
• Keel and rudder design
• Sail and rig design
• Balance
• Propeller and engine characteristics
• High-speed powerboat hydrodynamics
• Hull construction considerations for sail and power
• Rig calculations
• ISO standards for dimensioning
• Cockpit, deck, and cabin layout
• Weight calculations
• Design evaluation, performance prediction, experimental techniques, and computational fluid dynamics

"A classic." -- Cruising World

"A sound and up to date manual of yacht design . . . a classic in its field" -- Practical Boat Owner

"A definitive work on yacht design." -- Cruising

"Ideal for budding designers and mathematically-minded yachtsmen." -- Yachting Monthly

"The standard book on the subject." -- Yachting Life

"Covers every aspect of the yacht design process." -- IBI magazine

Product Details

ISBN-13:	9780071823739
Publisher:	McGraw Hill LLC
Publication date:	02/14/2014
Sold by:	Barnes & Noble
Format:	eBook
Pages:	352
File size:	33 MB
Note:	This product may take a few minutes to download.

About the Author

Lars Larsson is a naval architect and Professor of Hydrodynamics at Chalmers University in Gothenberg, Sweden.

Michal Orych is a naval architect and CFD specialist at FLOWTECH International.

Rolf Eliasson is a yacht design/construction engineer who runs his own yacht design and production company.

Table of Contents

PREFACE TO THE FIFTH EDITION

LIST OF SYMBOLS

INTRODUCTION

1 DESIGN METHODOLOGY

The design spiral

Computer-aided design (CAD)

2 PRELIMINARY CONSIDERATIONS

Choice of boat-type

Intended use

Main dimensions

Cost

Checklist of considerations

Checklist for the YD–41

3 HULL GEOMETRY

Definitions

Lines drawing

Tools

Work plan

Computer-aided design of hulls

4 HYDROSTATICS AND STABILITY

Calculation of areas

Wetted surface

Displacement

Centre of buoyancy

Water plane area

Transverse and longitudinal stability at small angles

Transverse stability at large angles of heel

Curve of static stability

Rolling

Influence of waves on the righting moment

Stability statistics

Assessment of seaworthiness

5 HULL DESIGN

Forces and moments on a sailing yacht

Resistance components

Viscous resistance: basic concepts

Frictional resistance

Viscous pressure resistance

Roughness

Wave resistance: basic concepts

Wave and residuary resistance

Heel resistance

Added resistance in waves

Other seakeeping aspects

Hull statistics

6 KEEL AND RUDDER DESIGN

Flow around a wing

Definition of the keel planform

Classical wing theory

Tip shape

Lift and induced resistance of the yacht

Advanced planform design

Canting keels

Evaluation of some planform concepts

Definition of the section

Three useful NACA sections

Influence of shape on section characteristics

Some practical conclusions regarding section shape

Influence of deviations from the theoretical section shape

Advanced section design

Statistics on keel and rudder area

The YD–41

7 SAIL AND RIG DESIGN

Flow around sails

Planform

Sail camber

Mast interference

Means for reducing mast disturbances

Streamlining

A practical model for sail and rig aerodynamics

Sail statistics

8 BALANCE

Effect of heel

Good balance

Centre of effort of the underwater body

Centre of effort of the sails

Lead

Rudder balance

9 PROPELLER AND ENGINE

Resistance in calm and rough weather

Propeller characteristics

Design of an optimum propeller

Performance of the non-optimum propeller

Check of blade area

Propeller resistance

10 HIGH SPEED HYDRODYNAMICS

Planing

Deadrise

Forces on a planing hull

Spray rails, stepped bottoms and transom flaps

Dynamic stability

Alternative propulsion devices

An example

11 RIG CONSTRUCTION

Definitions and scope of the standard

Forces on the shrouds

Forces on the stays

Comparison between wire and rod

Transverse mast stiffness

Longitudinal mast stiffness

Fractional mast top

Boom

Spreaders

Holes in the mast

The YD–41 rig

12 HULL CONSTRUCTION

Concepts in structural mechanics

Global loads

Local hydrostatic loads

Local hydrodynamic loads

Transverse load distribution

Local deformations

Forces from the keel

Forces from grounding

Forces from the rudder

Summary of loadings

13 MATERIALS

Glass reinforcement

Wet laminates

Fatigue

Exotic laminates

Sandwich

Typical sandwich buckling

Sandwich bending

Sandwich in practice

Final remarks

14 SCANTLING DETERMINATION

Structure of the ISO Standard

Basic laminate

Design loads for the bottom

Design loads for the topsides

Design loads for the decks, superstructures and bulkheads

Design loads for the internals

Longitudinal impact distribution factor

Area reduction factor

Panel calculation

Stiffener calculation

Spade rudder stock

Chainplates and keelbolts

Sandwich construction

The YD–41 scantlings

15 LAYOUT

Generic space requirements

Accommodation

Deck layout

16 DESIGN EVALUATION

Non-dimensional parameters

The Velocity Prediction Program (VPP)

Towing tank testing

Wind tunnel testing

Computational Fluid Dynamics (CFD)

APPENDIX 1: Main particulars of the YD–41

APPENDIX 2: Weight calculation

APPENDIX 3: STIX calculation

REFERENCES

INDEX

Editorial Reviews

This book is deeply fascinating . . . a must” —Classic Boat

“A sound and up to date manual of yacht design . . . a classic in its field.” —Practical Boat Owner

“A definitive work on yacht design.” —Cruising

“Ideal for budding designers and mathematically-minded yachtsmen.” —Yachting Monthly

“The standard book on the subject.” —Yachting Life

From the Publisher