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ADVANCED technology IN NAVY LOGISTICS SUPPORT

NAVAL ENGINEERS JOURNAL 1990年第3期102卷 111-118页

作者： HOUTS, RE The Author:is the director of the Advanced Logistics Technology Division in the Naval Supply Systems Command (NavSup) Engineering and Quality Directorate. He is responsible for managing Nav-Sup's lead role Navy-wide in the research and development of techniques processes and systems to improve Navy readiness and productivity. In this role his office serves as the Navy's Computer-aided Acquisition and Logistics Support (CALS) primary support office. Mr. Houts has more than 19 years of government service as a career logistics manager including a year-long assignment in OSD. Prior to being selected for the senior executive service in December 1985 and accepting his current position Mr. Houts spent 15 years at the Naval Air System Command. He has had extensive experience in logistics program initiation on major aircraft systems and in the development of contractual documents to implement logistics programs. He holds a B.S. degree in aerospace engineering from the University of Michigan and an M.S. degree in systems management from the University of Southern California.

In the face of present and foreseeable budget constraints which will severely restrict the amount of funding available to provide logistics support to the Navy's operating forces, the Naval Supply Systems Command's Advanced Logistics technology Division is actively pursuing a number of efforts to apply current and emerging technology to improve logistics systems and methodologies. The engineering Data management Information and Control System (EDMICS) program will automate the technical information process from initial acquisition through delivery to the end user, addressing the inability of current paper-based systems to cope with the tidal wave of information requirements for the effective management of weapon and logistics systems. Rapid Acquisition of Manufactured Parts (RAMP) program is applying computer integrated manufacturing (CIM) technology to the production of spare parts which are normally available only at great cost and with extensive lead time. The Standard Hardware Acquisition and Reliability program (SHARP) will standardize electronic system hardware (i.e., modules, power supplies, enclosures and batteries) to decrease development and logistics costs, while providing dramatic increases in component and system reliability. The Integrated Diagnostic Support System (IDSS) project is integrating diagnostic design into the weapon system development process to enhance the ability of the organizational level technician to detect and isolate system/equipment failures. This paper discusses each of these ongoing projects as well as a number of new initiatives being explored for future funding.

关键词： Military engineering

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ELECTROEXPULSIVE SEPARATION SYSTEM SHIPBOARD APPLICATIONS

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NAVAL ENGINEERS JOURNAL 1990年第5期102卷 55-66页

作者： EMBRY, GD ERSKINE, RW HASLIM, LA LOCKYER, RT MCDONOUGH, PT Gerald D. Embry:is a senior marine engineering specialist with Ingalls Shipbuilding Inc. in Pascagoula Mississippi. He earned his BS degree in mechanical engineering in 1961 at the University of Illinois. He has twenty-eight years experience in the ship design and construction field and has held several positions at Ingalls Shipbuilding ranging from engineering section manager to group manager of project engineering. He has held other responsible engineering positions at General Dynamics/Electric Boat and several consulting firms. He has been a registered professional engineer with the Commonwealth of Massachusetts since 1966 a member of ASNE since 1978 and a member of SNAME since 1968. Robert W. Erskine:is a naval architect specialist with Ingalls Shipbuilding Inc. in Pascagoula Mississippi. He earned a BSE in naval architecture and marine engineering in 1967 at the University of Michigan and an MBA in management in 1983 at the University of Southern Mississippi. He has 22 years of engineering and managerial experience in the Navy and in the commercial marine industry. Achievements during his 13 years with Ingalls include an Aegis Excellence A ward for his work on the CG-47 class cruiser program. He has also held responsible positions with ship operation and design consultant firms in New York City. He participated in the Bearing Sea trial described herein. He has been a member of ASNE since 1977 and a member of USNI since 1985. Leonard A. Haslim:is a program manager at NASA Ames Research Center Moffett Field California. He has earned advanced degrees in chemistry mathematics and engineering from UCLA UC and Stanford. He has forty-five years experience in aerospace engineering including responsible research development and engineering positions with the U.S. Navy Lockheed Missile and Space Ford Aerospace NASA and as a consultant for Arthur D. Little Company. He holds several patents including the Electro-Expulsive Separation System for which he earned NASA's 1988 Inventor of the Year Award.

THE AUTHORS 6 ABSTRACT Shipboard weather deck ice removal is a laborious, time consuming, dangerous task. The current operational scenario consists of sailors wielding hickory baseball bats. This paper describes a viable alternative, the Electro-Expulsive Separation System (EESS), originally developed by NASA. EESS technology has been designed to remove ice from aircraft surfaces. Developmental testing, which led to acceptance of this new device, is discussed together with its theory of operation. The resultant aircraft applications are described. The need to adapt this aircraft technology for shipboard applications is recognized by the Navy, the Coast Guard, the State of Alaska, and the commercial shipbuilding industry. Fishing vessels risk sinking every winter due to excessive ice accumulation on their decks and superstructure. Navy and Coast Guard cold water operations have been hampered for centuries due to severe ice accumulation during inclement weather. With the encouragement and cooperation of the State of Alaska, an EESS test program was formulated and subsequently conducted aboard an Alaskan Resources vessel in the Bering Sea. This testing is described, with lessons learned. Future test programs are identified, requisite for successful adaptation of this technology to combat and commercial shipboard applications.

关键词： Ships

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THE SURFACE SHIP MAINTENANCE CHALLENGE

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NAVAL ENGINEERS JOURNAL 1989年第3期101卷 73-81页

作者： JACOBS, KS SMITH, BD Kenneth S. Jacobs:is the acting director of the Naval Sea Systems Command's Surface Ship Maintenance Office. Originally trained as a data systems technician he attended Old Dominion University in Norfolk Virginia graduating with a B.S. degree in mechanical engineering in 1975. Over the course of the last 13 years Mr. Jacobs has served in NavSea as a project engineer for boats and service craft the type desk for AFS AOR AO and AOG ship types and as manager of the Amphibious and Auxiliary Ship Maintenance Strategy Program where he was instrumental in the development and implementation of the Phased Maintenance Program. He is a member of Tau Beta Pi. Bertram D. Smith Jr.:is a vice president of American Management Systems Inc. and engineering technical director of its defense business unit. He received his B.S. in engineering from the U.S. Naval Academy in 1957 and his M.S. and naval engineer degrees from the Massachusetts Institute of Technology in 1963. His experience includes shipboard operational engineering shipyard production planning and conversion project management carrier type commander maintenance engineering NavSea program management and private sector engineering management consulting. A member of ASNE since 1961 he is also a member of ASME and SNAME.

Current and projected future reductions in fleet maintenance funding are compelling the issue of ship maintenance requirements to be rethought on many different levels within the Navy. The Surface Ship Maintenance Office (SSMO) in the Naval Sea Systems Command has been involved with many different aspects of the problem. Recognizing the two different aspects of the challenge — doing the right things and doing things right — SSMO has been involved with improvements to front-end maintenance planning: doing the right things. These improvements are being formulated for action on three different levels. The first level involves changes to maintenance management philosophy, dealing with maintenance as a technology subject to systematic processes. The second level involves specific NavSea initiatives to strengthen the technical basis for maintenance requirements. The third level involves actions available to the fleet itself to provide relief. Today's surface ship maintenance funding environment provides both a challenge and an opportunity for improvement. The challenge is to adapt successfully to constrained maintenance resources; the opportunity is to pioneer new approaches to make this possible and establish the precedent for years to come. The groundwork necessary has been laid and work to meet the challenge has begun.

关键词： Naval Vessels

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COMPUTER-AIDED engineering AND SHOCK ANALYSIS FOR THE FOUNDATION OF A MODULARIZED VERTICAL LAUNCHING SYSTEM

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NAVAL ENGINEERS JOURNAL 1989年第2期101卷 34-43页

作者： WU, PY KANE, HP ELDER, RR REEVE, KM Philip Y. Wu received a B.E. degree in naval architecture and marine engineering from National College of Marine Science and Technology Taiwan and a M.E. degree in naval architecture and offshore engineering from U. C. Berkeley. Prior to joining John J. McMullen Associates Inc. (JJMA) in 1983 he worked on hydrodynamic projects at Brown and Root Inc. Houston and at Baker Marine Engineers Inc. where he developed and designed various classes of offshore jack-up rigs and semisubmersibles. After transferring to the JJMA's Arlington Va. office he focused on U.S. naval ship structural designs. He is currently a senior naval architect and a member of ASNE SNAME and ASME. Harry P. Kane is a senior project engineer in the Ship Modularity Section John J. McMullen Associates Inc. Arlington Va. He has a B.S. degree from Woodbury University and has attended numerous other training programs at the Universities of Nevada California Texas and Virginia. He has been employed as a program management engineer on a wide spectrum of design programs ranging from space booster systems remote sensors underwater acoustic systems ship systems Navy RDT&E management and technical program analysis. Currently he serves as a project leader for the application of modular weapons to different ship design programs. He is a member of the ASNE Journal Committee the Security and Intelligence Foundation and a life member of ASNE and the American Defense Preparedness Association. Robert R. Elder received a B.S.E. degree in naval architecture and marine engineering from the University of Michigan in 1969. He was commissioned an engineering duty officer and served aboard USS Guam (LPH-9) and at the Naval Ship Engineering Center Hyattsville Maryland. Prior to joining John J. McMullen Associates Inc. in 1980 he worked in various ship technical design disciplines at J.J. Henry Inc. and gained program management experience at Booz Allen Applied Research and Scientific Management Associates. He is currently the manager of the Ship M

The major objective of this paper is to describe a computer aided methodology for structural integration and analysis. Using the example of recent work in the installation of modular gun and vertical launch missile systems in warships, the reader is guided through a typical case of computer aided structural design and shock analysis, how the models are defined and tested, how the models are modified in order to be compatible with computer capacity, how structural elements are selected to simplify computations, and finally how the results of these operations are used to define the final product before construction and installation. With the maturation of the computer aided process as applied to the whole ship product, more attention must be focused on improving the individual elements of computer aided design (CAD), computer aided engineering (CAE) and computer aided manufacturing (CAM) and the integration of these processes and their products through computer integrated manufacturing (CIM). The application of the CAE techniques described herein to large maritime systems such as combatant, auxiliary and support, and commercial ships and to other large structures such as semisubmersible and fixed platforms is powerful and highly in demand. There is now a means to optimize large structural systems in terms of their discrete subsystems and components and harmonize the entire design while providing the proper design integrity at each successive level of detail.

关键词： Warships

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THE QUANTIFICATION OF INTEROPERABILITY

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NAVAL ENGINEERS JOURNAL 1989年第3期101卷 251-256页

作者： MENSH, DR KITE, RS DARBY, PH Dennis Roy Mensh:is currently the task leader Interoperability Project with the MITRE Corporation in McLean Va. He received his B.S. and M.S. degrees in applied physics from Loyola College in Baltimore Md. and the American University in Washington D. C. He also has completed his course work towards his Ph.D. degree in computer science specializing in the fields of systems analysis and computer simulation. He has been employed by the Naval Surface Warfare Center White Oak Laboratory Silver Spring Md. for 20 years in the areas of weapon system analysis and the development of weapon systems simulations. Since 1978 he has been involved in the development of tools and methodologies that can be applied to the solution of shipboard combat system/battle force system architecture and engineering problems. Mr. Mensh is a member of ASNE MORS IEEE U.S. Naval Institute MAA and the Sigma Xi Research Society. Robert S. Kite:is a systems engineer with the Naval Warfare Systems Engineering Department of the MITRE Corporation in McLean Va. Mr. Kite received his B.S. degree in electronic engineering from The Johns Hopkins University in Baltimore Md. Mr. Kite retired from the Federal Communications Commission in 1979 and served a project manager of the J-12 Frequency Management Support Project for the Illinois Institute of Technology Research Institute in Annapolis Md. before joining MITRE. Mr. Kite is presently a member of ASNE the Military Operations Research Society and an associate member of Sigma Xi. Paul H. Darby:has worked in the field of interoperability both in the development of interoperability concepts and systems since joining the Department of the Navy in 1967. He was the Navy's program manager for the WestPacNorth TACS/ TADS and IFFN systems. He is currently head of the Interoperability Branch Warfare Systems Engineering Office Space and Naval Warfare Systems Command. He holds a B.S. from the U.S. Naval Academy.

JCS Pub 1 defines interoperability as “The ability of systems, units or forces to provide services to and accept services from other systems, units or forces and to use the services so exchanged to enable them to operate effectively together.” With JCS Pub 1 as a foundation, interoperability of systems, units or forces can be factored into a set of components that can quantify interoperability. These components are: media, languages, standards, requirements, environment, procedures, and human factors. The concept described in this paper uses these components as an analysis tool to enable specific detailed analyses of the interoperability of BFC3 systems, units, or forces for the purpose of uncovering and resolving interoperability issues and problems in the U.S. Navy, Joint, and Allied arenas. Also, as a management tool, the components can help determine potential interoperability characteristics of future U.S. Navy BFC3 systems for compliance with battle force systems architectures. The approach selected for the quantification of interoperability was the development of a set of measures of performance (MOPs) and measures of effectiveness (MOEs). The MOPs/MOEs were integrated with a candidate set of components, which were used to partition the totality of interoperability into measurable entities. The methodology described employs basic truth table theory in conjunction with logic equations to evaluate the interoperability components in terms of MOPs that were aggregated to MOEs. It is believed that this concept, although elementary and based on fundamental principles, represents an operationally significant approach rather than a theoretical approach to the quantification of interoperability. The vehicle used as a means to measure the MOPs and MOEs was the Research Evaluation and Systems Analysis (RESA) computer modeling and simulation capability at the Naval Ocean Systems Center (NOSC), San Diego, Calif. Data for the measurements were collected during a Tactical I

关键词： Military engineering

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OUT-OF-PRODUCTION MICRO-ELECTRONICS - AN ACHILLES HEEL OF DEFENSE SYSTEMS

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NAVAL ENGINEERS JOURNAL 1988年第5期100卷 69-72页

作者： MACKENZIE, CM WOOTTEN, R HOY, K NEELY, J KOSCO, D SMITH, W C. Malcolm Mackenzie:is the Materials and Parts Availability Control program manager at U.S. Army Laboratory Command Adelphi Md. Mr. Mackenzie has a B.S. degree in mechanical engineering from Northwestern University an M.S. degree in the same field from the University of Michigan and an M.B.A. from East Texas State University. Richard Wootten:is project officer of the U.S. Army Material Command's Materials and Parts Availability Control Information Data System Project Adelphi Md. Mr. Wootten holds an associate's degree in mechanical engineering from Northern Virginia Community College and a Bachelor of Science in Electronics Engineering from The University of Alabama. Kevin Hoy:is manager of the Microelectronics Obsolescence Management Program at the Naval Avionics Center Indianapolis. Mr. Hoy holds both bachelor and master of science degrees in mathematics from Purdue University. James Neely:is leader of the Materials Management Team Industrial Materials Division in the Directorate of Manufacturing Air Force Systems Command Dayton Ohio. Mr. Neely holds a bachelor's degree in political science from The University of Georgia and a master of science degree in public administration from The University of Missouri. Don Kosco:is an electronics engineer currently involved with introducing new technologies into weapons systems. He is in the Directorate of Reliability Maintainability and Technology Policy HQ Air Force Logistics Command Dayton Ohio. Mr. Kosco holds a bachelor of engineering degree from Widener University a master's in systems engineering from The Air Force Institute of Technology and an MBA from the University of Texas at San Antonio. William Smith:is head of the Plans Branch in the Office of Policy and Plans Defense Electronics Supply Center (DESC) Dayton Ohio. He was for many years manager ofDESC's Diminishing Manufacturing Sources (DMS) Program. Mr. Smith holds a bachelor of arts degree in political science from Indiana University.

Both the timely manufacture of defense systems and their subsequent on-line operability depend upon the availability of component parts. The growing problem of microelectronic component nonavailability is casting a shadow over logistics support to these systems. This paper will discuss the causes of the problem and provide some examples of cases confronted by the DoD logistics community. It will also identify some actions which have been taken in the past to manage the issue as well as initiatives now underway. Finally it will look at what lies ahead.

关键词： Microelectronics

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COST MINIMIZATION DURING 2ND SOURCING

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NAVAL ENGINEERS JOURNAL 1988年第1期100卷 36-44页

作者： GWOZDZ, F Has over 17 years of experience working in defense and non-defense industries. He is presently a project manager with INFOrmed TECHnology an engineering consulting firm located in Lanham Maryland. His responsibilities include cost analysis and modeling economic and financial studies of weapons systems and special projects. Previously Mr. Gwozdz held a corporate position with Kennametal Defense Products where he developed and implemented a turn-key manufacturing plant improved and modified manufacturing processes analyzed production operations and resolved cost and productivity problems. As the plant engineer for a Union Carbide facility he personally developed a cost savings program generating $500000 per year. With Booz-Allen & Hamilton he developed government positions on labor cost for two shipyard claims totaling over $2 billion. Mr. Gwozdz has a B.S. in aeronautical engineering and management engineering from Rensselaer Polytechnic Institute and an M.B.A. from the University of New Haven.

This study attempts to develop strategies to minimize the negative cost impacts associated with selecting and awarding second source contracts. A number of factors are presented that may impact costs when second sources are used. Eight methods for determining sizes of prime and second source competitive award splits are reviewed. The analysis also includes an historical and economic overview. Economic market conditions are reviewed and applied to second sourcing. Finally, conclusions are formulated about minimizing costs, countering economic market conditions, and contractor gaming.

关键词： MILITARY engineering

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NAVAL SHIP DESIGN - EVOLUTION OR REVOLUTION

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NAVAL ENGINEERS JOURNAL 1988年第3期100卷 40-52页

作者： TIBBITTS, BF KEANE, RG RIGGINS, RJ Captain Barry Tibbitts USN: was graduated from the U.S. Naval Academy in 1956 and subsequently served as a gunnery division officer in an attack aircraft carrier and as gunnery officer operations officer and chief engineer in two diesel submarines. He attended MIT from 1962–1965 earning a master of science in mechanical engineering and a naval engineers degree. Early assignments as an engineering duty officer included SRF Yokosuka CINCPACFLT staff and SupShip Pascagoula. From 1976 to 1987 he served in a variety of senior ship design assignments: CVV ship design manager director NAVSEC Hull and Ship Design Divisions director NavSea Ship Design Management and Integration Office commander David Taylor Naval Ship R&D Center and director NavSea Ship Design Group. Recently retired but recalled to active duty he is the professor of naval construction and engineering at MIT. He has received seven personal decorations including two Legion of Merit awards. Robert G. Keane Jr.:is currently the deputy director of the NavSea Ship Design Group. He has been employed by NavSea and its predecessor organizations for over twenty years. He is a graduate of The Johns Hopkins University from which he received his B.E.S. degree in mechanical engineering in 1962. He received his M.E. degree in mechanical engineering in 1967 from Stevens Institute of Technology and in 1970 his M.S.E. degree in naval architecture and marine engineering from the University of Michigan. Mr. Keane held increasingly responsible design positions involving ship arrangements hull equipment hull form and hydrodynamic performance before being selected in 1981 for the Senior Executive Service to be director of the Naval Architecture Subgroup. Following an assignment at the David Taylor Research Center as assistant for transition of ship engineering technology he served as director of the Ship Survivability Subgroup until assuming his current position in 1985. He is an active member of ASNE SNAME and ASE. Robert Riggins:received a B.S. in mechanical

Some fairly radical changes to the naval ship design process occurred during the 1970s. The decade of the 80s has also witnessed a steady stream of changes. One of the most significant was the establishment of the Ship Characteristics Improvement Board (SCIB) in the Office of the Chief of Naval Operations (OpNav), and the resulting influence on the dialog between the military requirements decision makers and the Navy's ship designers. Other changes have occurred for which the impacts are less clear. These include establishment of the chief engineer of the Navy (ChEng) position, creation of the Space and Naval Warfare Systems Command (SpaWar) and OpNav's “Revolution at Sea” initiative. This paper will describe and discuss these and other changes, and comment on the resultant impact. The authors will attempt to present a global view of the total pattern of changes and try to discern if we are on a path of revolution, or merely normal evolution.

关键词： NAVAL VESSELS

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NTDS - A PAGE IN NAVAL HISTORY

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NAVAL ENGINEERS JOURNAL 1988年第3期100卷 53-61页

作者： SWENSON, EN MAHINSKE, EB STOUTENBURGH, JS Capt. Erick N. Swenson USNR (Ret.):is a project manager for special projects in the Surface Ship Systems Division Hughes Aircraft Company Fullerton Calif where he has been employed since his retirement from the U.S. Navy in 1975. Originally trained as an electronics technician during WWII in the Captain Eddy program he later received a BS degree in electrical engineering from the University of Rochester Rochester N. Y. in 1950. Subsequent engineering education was received at the University of Pittsburgh Pittsburgh Penn. and the Naval Postgraduate School Monterey Calif. After commissioning he was ordered to duty as the electronics division officer on the USSMissouri(BB-63) and electronics ships superintendent at Hunters Point Naval Shipyard San Francisco Calif. When the design of the Naval Tactical Data System began in the mid-1950s Lt. (j.g.) Swenson was ordered to the Bureau of Ships Navy Department Washington D.C. as the junior engineering duty only officer assigned to the project. From 1962 to 1965 LCdr. Swenson was assigned as the BuShips technical representative on the program at Remington Rand Univac St. Paul Minn. For the next ten years he returned to BuShips/NavSea/NAVSEC as the NTDS project officer. During this time the project expanded considerably foreign military sales were heavily involved and interoperability with other services and countries were established. His final effort on active duty was to instigate the redesign of the previousSpruanceclass destroyers into the newerAdmiral Kiddclass improvement program. He is a registered professional electrical engineer in the State of California listed inWho's Who in the Worldis a life member of ASNE and chairman of the Long Beach/Greater LA Section. Capt. Edmund B. Mahinske USN (Ret.):is an alumnus of the U.S. Naval Academy the Massachusetts Institute of Technology and the Harvard Business School. His technical background is in electronics and he specialized in the management of programs involving the application of comp

A little over thirty years ago, a group of naval engineers were assembled by the Bureau of Ships to develop a new system approach to the combat information center (CIC). The CIC of World War II, with its “grease pencil” plots and voice telling of tactical information from sensors and other ships, could no longer provide the timely, coordinated reaction to postwar threats. This project group led the Navy into the new world of large-scale, high-speed digital electronics and into a new mode of conducting naval warfare as well. There were no off-the-shelf computers of the requisite capability, size and reliability; what were available were monstrous vacuum tube computers. There were no display equipments that were “conversant” in both the digital language of the computer and the analog language of the sensors and the weapon systems. Who ever heard, at that time, of a computer running a tactical communication net automatically? It was hard enough to find sufficient numbers of engineers who knew what a digital computer was. This paper, by three naval engineers in the implementing engineering office, depicts the evolvement of the Naval Tactical Data Systems (NTDS) as they saw it. It discusses the problems that stemmed from the transition from the old world of analog into the new digital world, the system concepts that steered the development; the key decisions that were made; new electronic equipment and processes that became necessary; and the need of the mangagement to face the real world of deadlines, ship schedules and operational requirements.

关键词： NAVAL WARFARE

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HISTORY OF COAST-GUARD SURFACE EFFECT SHIP PERFORMANCE IMPROVEMENTS

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NAVAL ENGINEERS JOURNAL 1988年第3期100卷 237-250页

作者： LARIMER, G MCCOLLUM, J SCHAUB, B VANLIEW, D WHIPPLE, C Gary Larimer:received his B.S. (1974) and M.S. (1975) degrees in naval architecture and marine engineering from the University of Michigan. He has worked with the Bechtel Professional Corporation the David Taylor Naval Ship Research and Development Center and the United States Coast Guard. He is a member of SNAME ASNE ABYC and IMTI. He is the author of “Reaction Fin Applications In Marine Propulsion” which documented the use of asymmetric pre-swirl vanes to increase propulsion efficiency aboard a 41-ft Coast Guard utility boat. It was presented on 5 March 1987 at the Hampton Roads section of SNAME and was nominated for the section paper of the year award. CWO3 Joe Bobby McCollum USCG: iscurrently engineering officer of the Surface Effect Ship Division Seventh Coast Guard District Key West Florida. Prior to this assignment he was assistant engineering officer on the USCGCUte.His other duty tours included engineering assignments on theCape Currenta 95-foot patrol boat on the USCGCUnimak a 311-foot cutter CG Loran Station Upolo Point Hawaii and CG Station Sabine Pass Texas. CWO McCollum was responsible for modifying and repairing the SESs and contributed many unique problem solving ideas which resulted in much improved operation of the Coast Guard Surface Effect Ship Division. Benton H. Schaub:is a senior engineer with Maritime Dynamics Inc. He has a bachelor of science degree in naval architecture and marine engineering from the Massachusetts Institute of Technology. Mr. Schaub has fifteen years of experience working as a test engineer project engineer and design engineer on advanced marine vehicle projects and is a recognized authority in the areas of hull structure seal system and machinery design for surface effect ships. He has participated in virtually every USN SES design development and test evaluation program including: XR-5 XR-10 SES-100A SES-100A1 and the SES-200. He is currently responsible for performing detailed design and analysis in support of the seal system for the Germa

During the early 1980s the United States Coast Guard took delivery of three surface effect ships (SES) from Bell Halter, Inc. These 136-ton, 30-knot plus, aluminum hulled cutters were to be used primarily for drug interdiction in the southeastern United States. By early 1985, however, the full load weight of these cutters had grown to 150 long tons, and their top speed had dropped to below 23 knots in calm water. By mid-1985, operation of all three SESs was suspended to prevent possible catastrophic failure of their main engines. At this point, the USCG joined ranks with Textron Marine Systems (then Bell Aerospace), and Detroit Diesel to analyze what had gone wrong, and to propose solutions to the problems encountered. From that beginning, the performance of the Coast Guard's SESs has steadily and dramatically improved until at present all three cutters are able to exceed their original performance specifications. This paper discusses the problems experienced with the SESs, including engine overloading, vibration, ride quality, seal wear, poor lift system performance, and metal cracking, along with the corrective actions taken to solve them. The cooperation between government and private industry, which made this dramatic turn-around in performance possible, is also explored. Lessons learned about SES technology are viewed in relation to the general experience of the Coast Guard with other types of high performance hull forms.

关键词： NAVAL VESSELS

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