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The Stepped Hull Hybrid Hydrofoil
The Stepped Hull Hybrid Hydrofoil Christopher D. Barry, Bryan Duffty Planing @brid hydrofoils or partially hydrofoil supported planing boat are hydrofoils that intentionally operate in what would be the takeoff condition for a norma[ hydrofoil. They ofler a compromise ofperformance and cost that might be appropriate for ferq missions. The stepped hybrid configuration has made appearances in the high speed boat scene as early as 1938. It is a solution to the problems of instability and inefficiency that has limited other type of hybrids. It can be configured to have good seakeeping as well, but the concept has not been used as widely as would be justified by its merits. The purpose of this paper is to reintroduce this concept to the marine community, particularly for small, fast ferries. We have performed analytic studies, simple model experiments and manned experiments, andfiom them have determined some specljic problems and issues for the practical implementation of this concept. This paper presents background information, discusses key concepts including resistance, stability, seakeeping, and propulsion and suggests solutions to what we believe are the problems that have limited the widespread acceptance of this concept. Finally we propose a “strawman” design for a ferry in a particular service using this technology. BACKGROUND Partially hydrofoil supported planing hulls mix hydrofoil support and planing lift. The most obvious A hybrid hydrofoil is a vehicle combining the version of this concept is a planing hull with a dynamic lift of hydrofoils with a significant amount of hydrofoil more or less under the center of gravity. lit? tiom some other source, generally either buoyancy Karafiath (1974) studied this concept and ran model or planing lift. -
Austal Awarded A$68M Contract for 83 Metre Trimaran by Jr Kyushu Jet Ferry of Japan
COMPANY ANNOUNCEMENT 5 MARCH 2018 AUSTAL AWARDED A$68M CONTRACT FOR 83 METRE TRIMARAN BY JR KYUSHU JET FERRY OF JAPAN Following the Memorandum of Understanding (MOU) announced 8 December 2017, Austal (ASX:ASB) is pleased to announce the award of a A$68 million contract to design and build an 83 metre trimaran ferry for JR Kyushu Jet Ferry of Japan. Australia’s Ambassador to Japan, The Hon Richard Court AC and Japan’s Consul-General in Perth, Western Australia, Mr Tatsuo Hirayama joined Austal’s Chairman Mr John Rothwell AO and Chief Executive Officer Mr David Singleton for a signing ceremony at the Australian shipyard with JR Kyushu Jet Ferry’s President, Mr Masayuki Mizuno and General Manager, Planning, Mr Hitoshi Ogawa. “Austal congratulates JR Kyushu Jet Ferry on the selection of our proven trimaran platform to expand their Japan to South Korea route. This exciting new vessel will deliver excellent seakeeping and an unparalleled customer experience to JR Kyushu’s ferry network,” Mr Singleton said. “This contract is an outstanding start to 2018 for Austal, following a record year for commercial vessel sales in 2017 - and reflects our continued focus as a technology-led organisation in developing industry- leading, customised solutions for commercial operators around the world. Mr Ben Marland, Vice President Sales and Marketing, added “Austal’s unique trimaran hull design has truly revolutionised the commercial and defence vessel markets. This is the first high-speed trimaran ferry we have placed in to Japan and we are delighted to be partnered with JR Kyushu Jet Ferry on this prestigious route. -
Human Powered Hydrofoil Design & Analytic Wing Optimization
Human Powered Hydrofoil Design & Analytic Wing Optimization Andy Gunkler and Dr. C. Mark Archibald Grove City College Grove City, PA 16127 Email: [email protected] Abstract – Human powered hydrofoil watercraft can have marked performance advantages over displacement-hull craft, but pose significant engineering challenges. The focus of this hydrofoil independent research project was two-fold. First of all, a general vehicle configuration was developed. Secondly, a thorough optimization process was developed for designing lifting foils that are highly efficient over a wide range of speeds. Given a well-defined set of design specifications, such as vehicle weight and desired top speed, an optimal horizontal, non-surface- piercing wing can be engineered. Design variables include foil span, area, planform shape, and airfoil cross section. The optimization begins with analytical expressions of hydrodynamic characteristics such as lift, profile drag, induced drag, surface wave drag, and interference drag. Research of optimization processes developed in the past illuminated instances in which coefficients of lift and drag were assumed to be constant. These shortcuts, made presumably for the sake of simplicity, lead to grossly erroneous regions of calculated drag. The optimization process developed for this study more accurately computes profile drag forces by making use of a variable coefficient of drag which, was found to be a function of the characteristic Reynolds number, required coefficient of lift, and airfoil section. At the desired cruising speed, total drag is minimized while lift is maximized. Next, a strength and rigidity analysis of the foil eliminates designs for which the hydrodynamic parameters produce structurally unsound wings. Incorporating constraints on minimum takeoff speed and power required to stay foil-borne isolates a set of optimized design parameters. -
FY20.3 Annual Investors Meeting
FY20.3 Annual Investors Meeting May 12, 2020 Kyushu Railway Company Contents Highlights 3 Ⅰ Financial results for FY20.3 4 Ⅱ Forecasts for FY21.3 11 Ⅲ Short-term strategies 15 Ⅳ Status of Medium-Term Business Plan Initiatives 18 APPENDIX 28 2 Highlights Results Consolidated operating revenue, operating income, ordinary income, and net for FY20.3 income all declined. Due to the influence of the spread of the COVID 19 infection, future revenue trends Forecasts are very unclear, and accordingly our results forecast and annual dividends have not for FY21.3 yet been determined at this point. In the future, when it becomes possible to make a forecast, we will release it promptly. Cash flow is declining substantially, centered on the decline in railway passenger revenues. Accordingly, we will advance measures with the highest priority on securing liquidity at hand. In preparation for further worsening of cash flow, we will consider and implement Short-term diversification of our fund-raising methods. strategies Looking at capital investment, we will steadily advance railway safety investment and investment in two station buildings. On the other hand, we will delay or control investment as much as possible. When we generate cash through the reevaluation of our portfolio, we will first allocate it to working capital. Status of To further strengthen our management foundation, we will accelerate the reevaluation Medium-Term of our business portfolio. Business Plan We will work to build sustainable railway services through improved profitability, and will strive to increase the population in the areas around our railway lines by investing Initiatives in strategic city-building initiatives in the regions around our bases. -
2008 Fact Book
2008 PUBLIC TRANSPORTATION FACT BOOK 59th Edition June 2008 PUBLISHED BY American Public Transportation Association American Public Transportation Association 1666 K Street, N.W., Suite 1100 Washington, DC 20006 TELEPHONE: (202) 496-4800 EMAIL: [email protected] WEBSITE: www.apta.com APTA’s Vision Statement Be the leading force in advancing public transportation. APTA’s Mission Statement APTA serves and leads its diverse membership through advocacy, innovation, and information sharing to strengthen and expand public transportation. APTA’s Policy on Diversity APTA recognizes the importance of diversity for conference topics and speakers and is committed to increasing the awareness of its membership on diversity issues. APTA welcomes ideas and suggestions on how to strengthen its efforts to meet these important diversity objectives. Prepared by John Neff, Senior Policy Researcher [email protected] (202) 496-4812 PUBLIC TRANSPORTATION FACT BOOK American Public Transportation Association Washington, DC June 2008 Material from 2008 Public Transportation Fact Book may be quoted or reproduced without obtaining the permission of the American Public Transportation Association. Suggested Identification: American Public Transportation Association: Public Transportation Fact Book, Washington, DC, June, 2008. TABLE OF CONTENTS Table of Contents 28. Fossil Fuel Consumption by Mode…………….. 31 29. Non-diesel Fossil Fuel Consumption by Fuel… 31 INTRODUCTION 30. Bus Power Sources…....................................... 31 31. Bus Fossil Fuel Consumption…………………... 32 PUBLIC TRANSPORTATION OVERVIEW…………… 7 32. Paratransit Fuel Consumption………………….. 32 33. Rail Vehicle Fuel and Power Consumption….… 32 NATIONAL SUMMARY………………………….....…… 15 SAFETY………………………...............………..........… 33 1. Number of Public Transportation Service Providers by Mode……………………………… 15 34. Fatality Rates by Mode of Travel, 2001-2003… 33 2. -
Getting to Orsa Maggiore Hotel Orsa Maggiore Is Located in Anacapri, the Highest and Most Peaceful Area of the Island of Capri
How to get to Hotel Orsa Maggiore Getting to Orsa Maggiore Hotel Orsa Maggiore is located in Anacapri, the highest and most peaceful area of the island of Capri. We provide a free shuttle service on arrival and departure , from the port to the hotel and vice versa. Navigational companies: Call us a couple of hours before you are scheduled to arrive on the island, letting us know which ferry or Roma Aliscafi SNAV +39 081 8377577 hydrofoil you are going to take: you’ll find our driver waiting for you at the port. ORSA MAGGIORE Caremar Spa +39 081 8370700 NLG Navigazione Libera del Golfo +39 081 8370819 Phone: +39 081 8373351 Port Authority +39 081 8370226 Capri’s port is a small one and it's not always possible to park vehicles near to the landing docks. When Tourist Information Offices the port is busy, we ask guests to wait for the driver next to the Funicular railway ticket office. +39 081 8370686 Our shuttle service is available from 09.00 until 20.30. Should you decide to arrive or leave early in the Napoli morning or late in the evening, you will need to take a taxi or the bus (Marina Grande-Anacapri). Sorrento Positano Capri Hydrofoils and ferries to Capri depart from Naples and Sorrento. How long will the journey take? In the summer months, sea crossings are also From Rome airport: minimum 3 hours available from Positano, Amalfi, Salerno and (traveling by fast train and without missing a the island of Ischia. single connection) Times of crossings are subject to variation and From Naples airport: 90mins it’s always a good idea to check the hydrofoil From Sorrento: 30mins and ferry schedule before you travel to the port. -