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October 2013 www.sname.org/sname/mt (in review )REVIEWED BY CHRIS B. MCKESSON This is quite an interesting and unusual book. It is dicult to assign it to any one category on my bookshelf, but I am happy to have this book and its associated software in my personal library. e book comprises three sections, start- ing with a short but lovely illustrated section on the construction of yacht models for display or for sailing. e author discusses model con- struction, including the tools that are used. In the course of describing how to build a model yacht, he also describes the roles that physical models play in naval architecture, showing, for example, how a hull model built out of waterline lifts mimics the plan view of that hull in a lines plan. From this basis in physical modeling, the author moves on to a discussion of mathematical modeling. He provides an introduction to naval architecture, and then from this foundation develops an approach to build- ing model yachts in a mathematical representation, rather than a physical one. is constitutes the second major theme of the book, that mathematical models can be as much fun as physi- cal models. The third section of the book addresses the authors PC-Lines and PC-Sail software, which is provided on CD-ROM with the book. ese programs are Excel spreadsheets that implement the mathematical modeling principles developed in the second part of the book. e author provides a detailed explanation of the spreadsheets, rather in the form of a users Models, Adhesives, and Drag Reduction Ship Models, Math Models & Yacht Design By David E. Martin REVIEWED BY CARL DELO This impressive monograph is aimed at researchers, engineers, and designers who want to improve the performance of marine vessels by reducing resistance using elastic surface treatments. It is a compre- hensive summary of previous work on the topic, but also functions as a detailed introduction to boundary layer ow over both rigid and elastic surfaces. It is also an experimenters reference, with many models and testing setups described. As a lit- erature survey it is invaluable, with hundreds of works cited, covering all aspects of the topic.The book is a continuation of previous work by Viktor Babenko and others covering boundary layer ow in general, the formation of turbulence in shear ows, and boundary layer ow over elastic surfaces. e focus of this vol- ume is on drag reduction via control of the coherent vortex structures that exist within the boundary layer between the ves- sels surface and the uid medium. Elastic surfaces are the main control method discussed, with an emphasis on experimental investigation of marine animals to help guide the design of compliant surfaces to reduce drag on marine vessels. ere is an extensive treatment on the mechanical characterization of elastic surfaces, both theoretically and experimentally, as well as construction details for many examples. Static and dynamic testing meth- odologies are covered in detail. Marine animals, termed hydrobionts? in this work, such as swordsh and tuna, are investigated in detail, from their overall anatomy and geometry down to small-scale features and elastic properties of their skin and the tissue underneath. ese features include skin folds, riblets, scales, and orices. ere is consideration of the inuence of the action of mus- cles, tendons, and changing blood ow on the properties of the elastic skin during swimming and maneuvering. A good deal of attention is given to the xiphoid tip, that is, the sword of the swordsh, and its inuence on drag, alone and in conjunction with the release of polymers. Polymer and micro- bubble injection are investigated independently as additional control methods. When introduced within the boundary layer, they can alter the vortex structure of the ow and consequently modify drag. Mechanical methods of introducing vorticity into the ow are examined as well. Data are presented to show which types of control are benecial in various ow regimes. Graphs occasionally require careful inspection to deci- pher the labeling. There are some errors in the reference numbering as well, but generally the intended citation is easy to determine. Overall, this is a valuable reference for those working in the eld and will reward those with the ambition and patience to delve deeply into the material. MTCarl Delo is a SNAME member and associate professor of mechanical engi- neering at SUNY Maritime College. His graduate work was on the structure of turbulent boundary layers. Boundary Layer Flow over Elastic Surfaces: Compliant Surfaces and Combined Methods for Marine Vessel Drag Reduction By Viktor V. Babenko, Ho Hwan Chun, and Inwon Lee PUBLISHED BY BUTTERWORTH HEINEMANN/ELSEVIER