Techno Economic Environment And Risk Analysis Of An Aircraft Concept With Turbo Electric Distributed Propulsion

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Commercial Aircraft Propulsion and Energy Systems Research

Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309440998
Total Pages : 123 pages
Book Rating : 4.3/5 (94 download)

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Book Synopsis Commercial Aircraft Propulsion and Energy Systems Research by : National Academies of Sciences, Engineering, and Medicine

Download or read book Commercial Aircraft Propulsion and Energy Systems Research written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2016-08-09 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary human activities that release carbon dioxide (CO2) into the atmosphere are the combustion of fossil fuels (coal, natural gas, and oil) to generate electricity, the provision of energy for transportation, and as a consequence of some industrial processes. Although aviation CO2 emissions only make up approximately 2.0 to 2.5 percent of total global annual CO2 emissions, research to reduce CO2 emissions is urgent because (1) such reductions may be legislated even as commercial air travel grows, (2) because it takes new technology a long time to propagate into and through the aviation fleet, and (3) because of the ongoing impact of global CO2 emissions. Commercial Aircraft Propulsion and Energy Systems Research develops a national research agenda for reducing CO2 emissions from commercial aviation. This report focuses on propulsion and energy technologies for reducing carbon emissions from large, commercial aircraftâ€" single-aisle and twin-aisle aircraft that carry 100 or more passengersâ€"because such aircraft account for more than 90 percent of global emissions from commercial aircraft. Moreover, while smaller aircraft also emit CO2, they make only a minor contribution to global emissions, and many technologies that reduce CO2 emissions for large aircraft also apply to smaller aircraft. As commercial aviation continues to grow in terms of revenue-passenger miles and cargo ton miles, CO2 emissions are expected to increase. To reduce the contribution of aviation to climate change, it is essential to improve the effectiveness of ongoing efforts to reduce emissions and initiate research into new approaches.

Distributed Propulsion Technology

Author : Amir S. Gohardani
Publisher : Nova Science Publishers
ISBN 13 : 9781629485881
Total Pages : 0 pages
Book Rating : 4.4/5 (858 download)

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Book Synopsis Distributed Propulsion Technology by : Amir S. Gohardani

Download or read book Distributed Propulsion Technology written by Amir S. Gohardani and published by Nova Science Publishers. This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distributed propulsion technology is one of the revolutionary candidates for future aircraft propulsion. In this book, which serves as the very first reference book on distributed propulsion technology, the potential role of distributed propulsion technology in future aviation is investigated. Following a historical journey that revisits distributed propulsion technology in unmanned air vehicles, commercial aircrafts, and military aircrafts, features of this specific technology are highlighted in synergy with an electric aircraft concept and a first-of-its-kind comparison between commercial and military aircrafts employing distributed propulsion arrangements. In light of propulsionairframe integration and complementary technologies, such as boundary layer ingestion, thrust vectoring and circulation control, transpired opportunities and challenges are addressed in addition to a number of identified research directions proposed for future aircrafts. Moreover, a diverse set of distributed propulsion arrangements are considered. These include: small engines, gas-driven multi-fan architectures, turboelectric systems featuring superconductive and non-superconducting electrical machine technology, and electromagnetic fans. This book features contributions by the National Aeronautics and Space Administration (NASA) and the United States Air Force (USAF), and includes the first proposed official definition for distributed propulsion technology in subsonic fixed wing aircrafts.

Hydrogen Aircraft Technology

Author : G.Daniel Brewer
Publisher : Routledge
ISBN 13 : 1351439782
Total Pages : 450 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis Hydrogen Aircraft Technology by : G.Daniel Brewer

Download or read book Hydrogen Aircraft Technology written by G.Daniel Brewer and published by Routledge. This book was released on 2017-11-22 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid hydrogen is shown to be the ideal fuel for civil transport aircraft, as well as for many types of military aircraft. Hydrogen Aircraft Technology discusses the potential of hydrogen for subsonic, supersonic, and hypersonic applications. Designs with sample configurations of aircraft for all three speed categories are presented, in addition to performance comparisons to equivalent designs for aircraft using conventional kerosine-type fuel and configurations for aircraft using liquid methane fuel. Other topics discussed include conceptual designs of the principal elements of fuel containment systems required for cryogenic fuels, operational elements (e.g., pumps, valves, pressure regulators, heat exchangers, lines and fittings), modifications for turbine engines to maximize the benefit of hydrogen, safety aspects compared to kerosine and methane fueled designs, equipment and facility designs for servicing hydrogen-fueled aircraft, production methods for liquid hydrogen, and the environmental advantages for using liquid hydrogen. The book also presents a plan for conducting the necessary development of technology and introducing hydrogen fuel into the worldwide civil air transport industry. Hydrogen Aircraft Technology will provide fascinating reading for anyone interested in aircraft and hydrogen fuel designs.

Aircraft Design Projects

Author : Lloyd R. Jenkinson
Publisher : Elsevier
ISBN 13 : 0080498957
Total Pages : 393 pages
Book Rating : 4.0/5 (84 download)

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Book Synopsis Aircraft Design Projects by : Lloyd R. Jenkinson

Download or read book Aircraft Design Projects written by Lloyd R. Jenkinson and published by Elsevier. This book was released on 2003-04-28 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written with students of aerospace or aeronautical engineering firmly in mind, this is a practical and wide-ranging book that draws together the various theoretical elements of aircraft design - structures, aerodynamics, propulsion, control and others - and guides the reader in applying them in practice. Based on a range of detailed real-life aircraft design projects, including military training, commercial and concept aircraft, the experienced UK and US based authors present engineering students with an essential toolkit and reference to support their own project work.All aircraft projects are unique and it is impossible to provide a template for the work involved in the design process. However, with the knowledge of the steps in the initial design process and of previous experience from similar projects, students will be freer to concentrate on the innovative and analytical aspects of their course project. The authors bring a unique combination of perspectives and experience to this text. It reflects both British and American academic practices in teaching aircraft design. Lloyd Jenkinson has taught aircraft design at both Loughborough and Southampton universities in the UK and Jim Marchman has taught both aircraft and spacecraft design at Virginia Tech in the US.* Demonstrates how basic aircraft design processes can be successfully applied in reality* Case studies allow both student and instructor to examine particular design challenges * Covers commercial and successful student design projects, and includes over 200 high quality illustrations

On Subscale Flight Testing

Author : Alejandro Sobron
Publisher : Linköping University Electronic Press
ISBN 13 : 9176852202
Total Pages : 130 pages
Book Rating : 4.1/5 (768 download)

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Book Synopsis On Subscale Flight Testing by : Alejandro Sobron

Download or read book On Subscale Flight Testing written by Alejandro Sobron and published by Linköping University Electronic Press. This book was released on 2018-11-05 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Downscaled physical models, also referred to as subscale models, have played an essential role in the investigation of the complex physics of flight until the recent disruption of numerical simulation. Despite the fact that improvements in computational methods are slowly pushing experimental techniques towards a secondary role as verification or calibration tools, real-world testing of physical prototypes still provides an unmatched confidence. Physical models are very effective at revealing issues that are sometimes not correctly identified in the virtual domain, and hence can be a valuable complement to other design tools. But traditional wind-tunnel testing cannot always meet all of the requirements of modern aeronautical research and development. It is nowadays too expensive to use these scarce facilities to explore different design iterations during the initial stages of aircraft development, or to experiment with new and immature technologies. Testing of free-flight subscale models, referred to as Subscale Flight Testing (SFT), could offer an affordable and low-risk alternative for complementing conventional techniques with both qualitative and quantitative information. The miniaturisation of mechatronic systems, the advances in rapid-prototyping techniques and power storage, as well as new manufacturing methods, currently enable the development of sophisticated test objects at scales that were impractical some decades ago. Moreover, the recent boom in the commercial drone industry has driven a quick development of specialised electronics and sensors, which offer nowadays surprising capabilities at competitive prices. These recent technological disruptions have significantly altered the cost-benefit function of SFT and it is necessary to re-evaluate its potential in the contemporary aircraft development context. This thesis aims to increase the comprehension and knowledge of the SFT method in order to define a practical framework for its use in aircraft design; focusing on low-cost, short-time solutions that don’t require more than a small organization and few resources. This objective is approached from a theoretical point of view by means of an analysis of the physical and practical limitations of the scaling laws; and from an empirical point of view by means of field experiments aimed at identifying practical needs for equipment, methods, and tools. A low-cost data acquisition system is developed and tested; a novel method for semi-automated flight testing in small airspaces is proposed; a set of tools for analysis and visualisation of flight data is presented; and it is also demonstrated that it is possible to explore and demonstrate new technology using SFT with a very limited amount of economic and human resources. All these, together with a theoretical review and contextualisation, contribute to increasing the comprehension and knowledge of the SFT method in general, and its potential applications in aircraft conceptual design in particular.

Advanced Turboprop Project

Author : Roy D. Hager
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Advanced Turboprop Project by : Roy D. Hager

Download or read book Advanced Turboprop Project written by Roy D. Hager and published by . This book was released on 1988 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aviation Systems

Author : Andreas Wittmer
Publisher : Springer Science & Business Media
ISBN 13 : 364220080X
Total Pages : 247 pages
Book Rating : 4.6/5 (422 download)

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Book Synopsis Aviation Systems by : Andreas Wittmer

Download or read book Aviation Systems written by Andreas Wittmer and published by Springer Science & Business Media. This book was released on 2011-08-17 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims to provide comprehensive coverage of the field of air transportation, giving attention to all major aspects, such as aviation regulation, economics, management and strategy. The book approaches aviation as an interrelated economic system and in so doing presents the “big picture” of aviation in the market economy. It explains the linkages between domains such as politics, society, technology, economy, ecology, regulation and how these influence each other. Examples of airports and airlines, and case studies in each chapter support the application-oriented approach. Students and researchers in business administration with a focus on the aviation industry, as well as professionals in the industry looking to refresh or broaden their knowledge of the field will benefit from this book.

Hydraulic Fracturing in Unconventional Reservoirs

Author : Hoss Belyadi
Publisher : Gulf Professional Publishing
ISBN 13 : 0128176660
Total Pages : 636 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Hydraulic Fracturing in Unconventional Reservoirs by : Hoss Belyadi

Download or read book Hydraulic Fracturing in Unconventional Reservoirs written by Hoss Belyadi and published by Gulf Professional Publishing. This book was released on 2019-06-18 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulic Fracturing in Unconventional Reservoirs: Theories, Operations, and Economic Analysis, Second Edition, presents the latest operations and applications in all facets of fracturing. Enhanced to include today's newest technologies, such as machine learning and the monitoring of field performance using pressure and rate transient analysis, this reference gives engineers the full spectrum of information needed to run unconventional field developments. Covering key aspects, including fracture clean-up, expanded material on refracturing, and a discussion on economic analysis in unconventional reservoirs, this book keeps today's petroleum engineers updated on the critical aspects of unconventional activity. - Helps readers understand drilling and production technology and operations in shale gas through real-field examples - Covers various topics on fractured wells and the exploitation of unconventional hydrocarbons in one complete reference - Presents the latest operations and applications in all facets of fracturing

The Power for Flight

Author : Jeremy R. Kinney
Publisher : Government Printing Office
ISBN 13 : 9781626830370
Total Pages : 318 pages
Book Rating : 4.8/5 (33 download)

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Book Synopsis The Power for Flight by : Jeremy R. Kinney

Download or read book The Power for Flight written by Jeremy R. Kinney and published by Government Printing Office. This book was released on 2018-02-15 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NACA and aircraft propulsion, 1915-1958 -- NASA gets to work, 1958-1975 -- The shift toward commercial aviation, 1966-1975 -- The quest for propulsive efficiency, 1976-1989 -- Propulsion control enters the computer era, 1976-1998 -- Transiting to a new century, 1990-2008 -- Toward the future

Small is Profitable

Author : Amory B. Lovins
Publisher : Routledge
ISBN 13 : 1134258747
Total Pages : 398 pages
Book Rating : 4.1/5 (342 download)

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Book Synopsis Small is Profitable by : Amory B. Lovins

Download or read book Small is Profitable written by Amory B. Lovins and published by Routledge. This book was released on 2020-11-27 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today's electricity industry - large power stations feeding a nationwide grid - will soon be a thing of the past. This book explains why and what will replace it - decentralized and distributed electrical resources which can be up to 10 times as economically valuable. The authors - all leading experts in the field - explain very clearly and thoroughly all the benefits, so the engineers will understand the economic advantages and the investors will understand the engineering efficiencies. Here's what industry experts are saying about Small is Profitable... 'A tour-de-force and a goldmine of good ideas. It is going to have a stunning impact on thinking about electricity.' Walter C. Patterson, Senior Research Fellow, Royal Institute of International Affairs, London. 'An amazing undertaking - incredibly ambitious yet magnificently researched and executed.' Dr. Shimon Awerbuch, Senior Advisor, International Energy Agency, Paris. 'Outstanding...You have thought of some [benefits] I never considered...A great resource for the innovation in energy services that will have to take place for us to have a sustainable future.' Dr. Carl Weinberg, Weinberg Associates, former Research Director, PG&E. 'This is a brilliant synthesis and overview with a lot of original analytics and insights and a very important overall theme. I think it is going to have a big impact.' Greg Kats, Principal, Capital E LLC, former Finance Director for Efficiency and Renewable Energy, U.S. Department of Energy. 'E. F. Schumacher would be proud of this rigorous extension of his thesis in Small is Beautiful. It shows how making systems the right size can make them work better and cost less. Here are critical lessons for the new century: technologies tailored to the needs of people, not the reverse, can improve the economy and the environment.' Dr. Daniel Kammen, Professor of Energy and Society and of Public Policy, University of California, Berkeley. 'Small is Profitable creates an unconventional but impeccably reasoned foundation to correctly assign the costs and true benefits of distributed energy systems. It has become an indispensable tool for modelling distributed energy systems benefits for us.' Tom Dinwoodie, CEO and Chairman, PowerLight Corporation. 'A Unique and valuable contribution to the distributed energy industry...Small Is Profitable highlights the societal benefits of distributed resources, and will be a helpful guide to policymakers who wish to properly account for these benefits in the marketplace.' Nicholas Lenssen, Senior Director, Primen. 'This book will shift the electric industry from the hazards of overcentralization toward the new era where distributed generation will rule.' Steven J. Strong, President, Solar Design Associates, Inc. 'Readers will understand why distributed resources are poised to fundamentally alter the electric power system. Its comprehensive review of the benefits of distributed resources [is] an important part of my library.' Dr. Thomas E. Hoff, President, Clean Power Research. 'The most comprehensive treatise on distributed generation.... Great job and congratulations.' Howard Wenger, Principal, Pacific Energy Group '..[D]ensely packed with information and insights...goes a long way to demonstrate that the former paradigm of electric power supply no longer makes sense.' Prof. Richard Hirsh, University of Vermont, Leading historian of the electric power sector. 'Amory Lovins was already the world's most original and influential thinker on the future of energy services in general and electricity systems in particular. This remarkable book is a very worthy addition to an extraordinary legacy.' Ralph Cavanagh, Energy Co-Director, Natural Resources Defense Council. 'This is a book every utility professional should have on the bookshelf.' Dr Peter S. Fox-Penner, Principal and Chairman of the Board, the Brattle Group, former Principal Deputy Assistant Secretary of Energy.

Discounted Cash Flow

Author : Lutz Kruschwitz
Publisher : John Wiley & Sons
ISBN 13 : 0470870451
Total Pages : 178 pages
Book Rating : 4.4/5 (78 download)

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Book Synopsis Discounted Cash Flow by : Lutz Kruschwitz

Download or read book Discounted Cash Flow written by Lutz Kruschwitz and published by John Wiley & Sons. This book was released on 2006-02-03 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Firm valuation is currently a very exciting topic. It is interesting for those economists engaged in either practice or theory, particularly for those in finance. The literature on firm valuation recommends logical, quantitative methods, which deal with establishing today's value of future free cash flows. In this respect firm valuation is identical with the calculation of the discounted cash flow, DCF. There are, however, different coexistent versions, which seem to compete against each other. Entity approach and equity approach are thus differentiated. Acronyms are often used, such as APV (adjusted present value) or WACC (weighted average cost of capital), whereby these two concepts are classified under entity approach. Why are there several procedures and not just one? Do they all lead to the same result? If not, where do the economic differences lie? If so, for what purpose are different methods needed? And further: do the known procedures suffice? Or are there situations where none of the concepts developed up to now delivers the correct value of the firm? If so, how is the appropriate valuation formula to be found? These questions are not just interesting for theoreticians; even the practitioner who is confronted with the task of marketing his or her results has to deal with it. The authors systematically clarify the way in which these different variations of the DCF concept are related throughout the book ENDORSEMENTS FOR LÖFFLER: DISCOUNTED 0-470-87044-3 "Compared with the huge number of books on pragmatic approaches to discounted cash flow valuation, there are remarkably few that lay out the theoretical underpinnings of this technique. Kruschwitz and Löffler bring together the theory in this area in a consistent and rigorous way that should be useful for all serious students of the topic." --Ian Cooper, London Business School "This treatise on the market valuation of corporate cash flows offers the first reconciliation of conventional cost-of-capital valuation models from the corporate finance literature with state-pricing (or 'risk-neutral' pricing) models subsequently developed on the basis of multi-period no-arbitrage theories. Using an entertaining style, Kruschwitz and Löffler develop a precise and theoretically consistent definition of 'cost of capital', and provoke readers to drop vague or contradictory alternatives." --Darrell Duffie, Stanford University "Handling firm and personal income taxes properly in valuation involves complex considerations. This book offers a new, precise, clear and concise theoretical path that is pleasant to read. Now it is the practitioners task to translate this approach into real-world applications!" --Wolfgang Wagner, PricewaterhouseCoopers "It is an interesting book, which has some new results and it fills a gap in the literature between the usual undergraduate material and the very abstract PhD material in such books as that of Duffie (Dynamic Asset Pricing Theory). The style is very engaging, which is rare in books pitched at this level." --Martin Lally, University of Wellington

Air Transport System

Author : Dieter Schmitt
Publisher : Springer
ISBN 13 : 3709118808
Total Pages : 383 pages
Book Rating : 4.7/5 (91 download)

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Book Synopsis Air Transport System by : Dieter Schmitt

Download or read book Air Transport System written by Dieter Schmitt and published by Springer. This book was released on 2015-10-06 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book addresses all major aspects to be considered for the design and operation of aircrafts within the entire transportation chain. It provides the basic information about the legal environment, which defines the basic requirements for aircraft design and aircraft operation. The interactions between airport, air traffic management and the airlines are described. The market forecast methods and the aircraft development process are explained to understand the very complex and risky business of an aircraft manufacturer. The principles of flight physics as basis for aircraft design are presented and linked to the operational and legal aspects of air transport including all environmental impacts. The book is written for graduate students as well as for engineers and experts, who are working in aerospace industry, at airports or in the domain of transport and logistics.

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 836 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Human Performance and Limitations in Aviation

Author : R. D. Campbell
Publisher : John Wiley & Sons
ISBN 13 : 1405147342
Total Pages : 208 pages
Book Rating : 4.4/5 (51 download)

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Book Synopsis Human Performance and Limitations in Aviation by : R. D. Campbell

Download or read book Human Performance and Limitations in Aviation written by R. D. Campbell and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human error is cited as a major cause in over 70% of accidents, andit is widely agreed that a better understanding of humancapabilities and limitations - both physical and psychological -would help reduce human error and improve flight safety. This book was first published when the UK Civil AviationAuthority introduced an examination in human performance andlimitations for all private and professional pilot licences. Nowthe Joint Aviation Authorities of Europe have published a newsyllabus as part of their Joint Aviation Requirements for FlightCrew Licensing. The book has been completely revised and rewritten to takeaccount of the new syllabus. The coverage of basic aviationpsychology has been greatly expanded, and the section on aviationphysiology now includes topics on the high altitude environment andon health maintenance. Throughout, the text avoids excessive jargonand technical language. "There is no doubt that this book provides an excellent basicunderstanding of the human body, its limitations, the psychologicalprocesses and how they interact with the aviation environment. I amcurrently studying for my ATPL Ground Exams and I found this bookto be an invaluable aid. It is equally useful for those studyingfor the PPL and for all pilots who would like to be reminded oftheir physiological and psychological limitations." –General Aviation, June 2002

Capital Budgeting

Author : Don Dayananda
Publisher : Cambridge University Press
ISBN 13 : 113943487X
Total Pages : 290 pages
Book Rating : 4.1/5 (394 download)

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Book Synopsis Capital Budgeting by : Don Dayananda

Download or read book Capital Budgeting written by Don Dayananda and published by Cambridge University Press. This book was released on 2002-10-17 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explains the financial appraisal of capital budgeting projects. The coverage extends from the development of basic concepts, principles and techniques to the application of them in increasingly complex and real-world situations. Identification and estimation (including forecasting) of cash flows, project appraisal formulae, and the application of net present value (NPV), internal rate of return (IRR) and other project evaluation criteria are illustrated with a variety of calculation examples. Risk analysis is extensively covered by the use of risk adjusted discount rate, certainty equivalent, sensitivity, simulation and Monte Carlo analysis. The NPV and IRR models are further applied to forestry, property and international investments. Resource constraints are introduced to the capital budgeting decisions with a variety of worked examples using linear programming technique. All calculations are extensively supported by Excel workbooks on the Web, and each chapter is well reviewed by end of chapter questions.

Fundamentals of Aircraft and Airship Design

Author : Leland Malcolm Nicolai
Publisher : AIAA (American Institute of Aeronautics & Astronautics)
ISBN 13 :
Total Pages : 940 pages
Book Rating : 4.3/5 (97 download)

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Book Synopsis Fundamentals of Aircraft and Airship Design by : Leland Malcolm Nicolai

Download or read book Fundamentals of Aircraft and Airship Design written by Leland Malcolm Nicolai and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 2010 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aircraft is only a transport mechanism for the payload, and all design decisions must consider payload first. Simply stated, the aircraft is a dust cover. "Fundamentals of Aircraft and Airship Design, Volume 1: Aircraft Design" emphasizes that the science and art of the aircraft design process is a compromise and that there is no right answer; however, there is always a best answer based on existing requirements and available technologies.

A Fire Upon The Deep

Author : Vernor Vinge
Publisher : Tor Science Fiction
ISBN 13 : 1429981989
Total Pages : 626 pages
Book Rating : 4.4/5 (299 download)

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Book Synopsis A Fire Upon The Deep by : Vernor Vinge

Download or read book A Fire Upon The Deep written by Vernor Vinge and published by Tor Science Fiction. This book was released on 2010-04-01 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now with a new introduction for the Tor Essentials line, A Fire Upon the Deep is sure to bring a new generation of SF fans to Vinge's award-winning works. A Hugo Award-winning Novel! “Vinge is one of the best visionary writers of SF today.”-David Brin Thousands of years in the future, humanity is no longer alone in a universe where a mind's potential is determined by its location in space, from superintelligent entities in the Transcend, to the limited minds of the Unthinking Depths, where only simple creatures, and technology, can function. Nobody knows what strange force partitioned space into these "regions of thought," but when the warring Straumli realm use an ancient Transcendent artifact as a weapon, they unwittingly unleash an awesome power that destroys thousands of worlds and enslaves all natural and artificial intelligence. Fleeing this galactic threat, Ravna crash lands on a strange world with a ship-hold full of cryogenically frozen children, the only survivors from a destroyed space-lab. They are taken captive by the Tines, an alien race with a harsh medieval culture, and used as pawns in a ruthless power struggle. Tor books by Vernor Vinge Zones of Thought Series A Fire Upon The Deep A Deepness In The Sky The Children of The Sky Realtime/Bobble Series The Peace War Marooned in Realtime Other Novels The Witling Tatja Grimm's World Rainbows End Collections Collected Stories of Vernor Vinge True Names At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.