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April 2013 www.sname.org/sname/mt ( from the editorial board )This April issue of (mt) is focused on high performance, dened as pushing the boundar- ies along any of the spokes of the design spiral. High performance often elicits a wow? response, and if we could provide a single iss ue to prospective students, this would be it. Our issue leads, Rik van Hemmen and Dean Schleicher, have worked hard to bring us an exciting issue that addresses novel designs, advances in engineering approaches and tools, mod- ern materials, and innovative construction techniques. Collectively, these redene the limits of what we can accomplish as naval architects, marine engineers, and builders of ships, yachts, and small craft. Our cover photo showcases Adastra , designed by John Shuttleworth Yacht Designs Ltd. and built by McConaghy Boats. is 42.5-m trimaran has a superstructure made of carbon ber with Nomex honeycomb core and hull of glass/Kevlar foam sandwich, and is one of the vessels spotlighted in our marine composites feature by Eric Greene. We have three comple- mentary features that explore advances in performance sailing craft, including how designers have dealt with extreme loads, used specialized engineering tools, and how performance sail- ing craft advances have transitioned into day charter sailing yachts. Christine Schleicher addresses the challenge of hydrodynamic evaluation of new and innovative hull forms in her feature Outside the Lines.? Other features demonstrate that high performance relates not only to speed, but also to operability, and John Nieboer shows us how innovations in hull design and ergonomics enabled Damen and KNRM to develop a next-gen- eration lifeboat stressing improved seakeeping performance and crew safety. Our Vessel Report showcases Metal Sharks 28 Deant, the United States Coast Guards response boat-small ves- sel, which sets new standards for ergonomics, crew comfort, and visibility. Redening limits has been a theme as long as there have been naval architects and marine engineers. Donald Blount shares his insight on the evolution of performance boats and craft, and our Founders and Leaders department features an interview with Dr. Daniel Savitsky, which explores the impact Savitskys work has had on the development of high-performance vessels, along with the continuing relevancy of physical modeling. Wayne L. Neu and his stu- dents at Virginia Tech share their work updating the Gabrielli-von Kármán performance plot, quantifying relative vessel transport eciency over time. And Rik van Hemmens Historical Note reviews the career of Nathanael Greene Herresho, a pioneer in high-performance vessels. Also check out our preview? of the October 2013 issue, starting on page 13 of this issue: Peter Wallaces article on managing risk in a high-performance environment. Matthew P. Tedesco Chair, SNAME (mt) editorial board Hendrik Rik? van Hemmen is the president of Martin & Ottaway, a 138-year-old marine consulting rm. He built his rst boat when he was six and never stopped. He is a third generation maritime engineer, a licensed profes- sional engineer and a fellow in SNAME and the National Academy of Forensic Engineers. His father was a SNAME member and two of his children are SNAME members. His love of engineering is deeply tied to his interest in the art, science, and psychology of high performance and system eciencies. He is involved with various SNAME T&R panels and the chair of panel EC-7. Dean Schleicher is with Naval Sea Systems Command, Auxiliary and Special Mission Ship Design Division (SEA 05D4), and is a naval architect and gen- eral engineer with a wide range of expertise and expe- rience with powerboats from 18 ft. to 400 ft. in length, with a particular focus on high performance. His career has included positions with the United States Navy as a naval architect, project engineer, and technical warrant holder and with Donald L. Blount and Associates, Inc. as naval architect and technical director. He has had the opportunity to work closely with many professionals in the design, engineering, construction, test, and evalua- tion of numerous powerboats. The High-Performance Model Leaders for This Issue Published by the Society of Naval Architects and Marine Engineers 601 Pavonia Avenue, Jersey City, NJ 07306 Phone: 201-798-4800 Fax: 201-798-4975 www.sname.org/sname/mt Peter G. Noble President pnoble@sname.org Erik W. Seither Executive Director eseither@sname.org Bruce S. Rosenblatt Treasurer Susan Evans Grove Publications Director sevans@sname.org Douglas R. Kelly Editor dkelly@sname.org Alan Rowen Book Review Editor arowen@sname.org Dave Weidner, Advertising Sales advertising@sname.org Tommie-Anne Faix, Publications Sales Associate tfaix@sname.org Editorial Advisory Board Design Bates Creative Group, Silver Spring, MD O cers of the Society Peter G. Noble, President Erik W. Seither, Ex ecutive Director Bruce Rosenblatt, Treasurer Regional Vice Presidents 2013: Atlantic South: H. Paul Cojeen Central & Gulf: Joseph H. Comer, III International: John Kokarakis 2014:Paci?c: William B. Hale Atlantic North: John Volc 2015:Atlantic South: Robert J. Gies Central & Gulf: Scott C. McClure International: Harilaos N. Psaraftis 2016:Paci?c: Dan E. McGreer Atlantic: Timothy J. Keyser Publication in (mt) Marine Technology does not constitute an endorsement of any product or service referred to, nor does publication of an advertisement represent an endorsement by the Society of Na val Architects and Marine Engineers or the magazine. All articles represent the viewpoints of the authors and are not necessarily those of the Society of Naval Archit ects and Marine Engineers, or the magazine. Subscriptions: (mt) Marine Technology is circulated to all members of the Society as a portion of their dues allocation. Non-member subscript ions are $120 annually for the U.S. and possession s; single copies are $35. For international non-members, subscriptions are $130 annually; single copies are $35. (mt) Marine Technology is dedicated to James Kennedy, 1867-1936, marine engineer and longtime member of the Society, in recognition and appreciation of his sincere and generous interest in furthering ship design, shipbuilding, ship operation, and related activi ties. April 2013 Matthew Tedesco, Chair Rod Allan Chris Cikanovich Chris Dlugokecki Vicki Dlugokecki Norbert DoerryJay Edgar Peter Tang Jensen Luca Letizia Kevin McSweeney Peter Noble Jeom Paik Erik SeitherRik van Hemmen Peter Wallace