March 2014 Page4

W

estlawn Institutehas introduced the secondnew text-

book in threemonths. Thisnew text is

,Westlawnbook105a. It is part ofWestlawn’s

Yacht&Boat DesignProgram inModule1, andalso inWest-

lawn’s Elements of Technical Boat Design short course. The

newPrinciples of ResistanceBook105a, replaces theprevi-

ous versionof this text andnot only completely updates the

previousmaterial, but ads exten-

sivenewmaterial,more than tri-

pling the content and scopeof the

previousmaterial.

now cov-

ers not only the fundamental prin-

ciples underlying resistanceof

boats, but now includes reviews of

theReynoldsnumber, fundamen-

tals of direct calculationof resis-

tance, principles of tank testing,

andpractical speedandpowering

calculations for all types of boats.

The full contents is:

Chapter 1 - BasicPrinciples

FluidCharacteristics, Frictional

Resistance, Residual Resistance,

Air Resistance, Resistance

Particular toSailboats

Resistance

Basic FluidCharacteristics

Bernoulli’s Theorem

Frictional Resistance

Boundary Layer

ReynoldsNumber

Residual Resistance

Hull Speed

Linear FroudeNumber

Displacement/LengthRatio

PrismaticCoefficient

CombiningFrictional andRe-

sidual Resistance

Air orWindResistance

ResistancePeculiar toSail-

boats

Typical StreamlinedSection

Aspect Ratio

Rayner Analysis

Chapter 2 - Principles of Calculat-

ingResistance; Resistanceand

Powering, Calculating Frictional

Resistance, ReynoldsNumber,

Effectiveand IndicatedHorsepower

ResistanceandPowering

Sumof Resistances

CalculatingFrictional Resistance

KinematicViscosity ofWater

ReynoldsNumber Calculation

Determining theCoefficient of Friction

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