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    Principles of Yacht Design

    Principles of Yacht Design

    by Lars Larsson, Rolf Eliasson


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      ISBN-13: 9780071823739
    • Publisher: McGraw-Hill Education
    • 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.

    Lars Larsson, a naval architect, is Professor of Hydrodynamics at Chalmers University of Technology in Gothenburg, Sweden. He is also president of Flowtech International and was for 18 years a scientist at SSPA Maritime Consulting. He has written 100 papers on computational fluid dynamics and has taught both academic and public courses on yacht design. A lifelong sailor, he has been a consultant to the Swedish Olympic Sailing Team and three America’s Cup teams.


    Rolf Eliasson, a yacht design/construction engineer specializing in boat structures, runs his own design company for both production and custom boats. More than 400 boats have been built from his designs in the past 25 years. He was among the pioneers in using computer design, and has built six boats himself. Since 1990 he has served on various working groups setting ISO standards for yacht stability, safety, and scantlings for the European Union.

    Table of Contents

    Preface to the Second 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 - 40

    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

    Influence of hull shape on wave 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

    Advanced planform design

    Evaluation of some planform concepts

    Definition of the section

    Three useful NACA sections

    Influence of shape on sectioncharacteristics

    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 - 40

    7. Sail and Rig Design

    Flow around sails

    Planform

    Sail camber

    Mast interference

    Means for reducing mast distubances

    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

    The YD - 40 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

    Hull definitions

    Basic laminate

    Design loads for the bottom

    Design loads for the topsides

    Design loads for the decks 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 - 40 scantlings

    15. Layout

    Generic space requirements

    Accomodation

    Deck layout

    16. Design Evaluation

    Non-dimensional parameters

    The Velocity Prediction Program (VPP)

    Towing tank testing

    Computational Field Dynamics (CFD)

    Appendix 1

    Main Particulars of the YD - 40

    Appendix 2

    Weight calculation

    Appendix 3

    STIX calculation

    References

    Index

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    "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

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