[PDF] The Future Of Military Engines eBook

Author : Andrew P. Hunter
Publisher : Rowman & Littlefield
Page : 83 pages
File Size : 31,19 MB
Release : 2021-10-08
Category : Political Science
ISBN : 1538140349

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CSIS's The Future of Military Engines looks at the state of the U.S. military engine industrial base and the choices confronting policymakers at the Department of Defense (DoD). The military engine industrial base is closely tied to the industrial base for commercial engines. U.S. engine providers use many of the same facilities and largely the same supply chain for military and commercial engines. The ability to leverage commercial supply chains is critical because supply chain quality underlies the performance advantage of U.S. military engines, both for individual aircraft and military aircraft fleets. International competitors such as Russia and China are seeking to overtake the U.S. in engines. However, the current U.S. advantage is sustainable if it is treated as a national priority. Many military aircraft, especially fighters, require engines with important differences from commercial aircraft. They fly different flight profiles and perform different jobs. These differences mean that while DoD can leverage the commercial engine industrial base, it must also make investments to sustain the industrial base’s unique military components. In the next few years, DoD investment in military engines is projected to decrease significantly, particularly for R&D. This presents a challenge as military-unique engineering skills are highly perishable. Four major policy choices confront DoD as it formulates its investment approach to military engines going forward: 1) Priority, 2) Resources, 3) Business Model, and 4) Competition. The DoD is at an inflection point for engine investment, and the time for choosing on these four key policy questions will come in the next few years.

Author : M. R. Litchfield
Publisher :
Page : 13 pages
File Size : 39,99 MB
Release : 1987
Category :
ISBN :

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The paper examines the prospects for major advances in gas turbine engine component technology over the next 20 years. For future military engines and aircraft, these advances could lead to considerably higher thrust/weight ratios than are currently available. The gains in engine performance resulting from various specific technology advances are outlined and their impact on the sizing and performance of a typical combat aircraft are considered. In conjunction with these future projections, an examination is also made of the influences of main engine cycle parameters, such as overall pressure ratio, bypass ratio, and rating philosophy on the mass and performance of the aircraft/engine combination. (sdw).

Author : Robert W. Drewes
Publisher : DIANE Publishing
Page : 193 pages
File Size : 18,66 MB
Release : 1995-09
Category :
ISBN : 0788121510

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Examines the 1984 "war" that pitted Pratt and Whitney against GE in head-to-head competition for multi billion dollar defense contracts to provide high performance engines for front line fighter aircraft. The circumstances surrounding the lengthy battle led to the Air Force decision to split future engine sales between the two. Attempts to cut through emotional opinions of the "combatants," to report reality, and to identify lessons learned. Helps the reader to understand the government-to-contractor personality issues; to understand management styles, business expectations and communication skills of key participants.

Author : National Research Council
Publisher : National Academies Press
Page : 214 pages
File Size : 12,31 MB
Release : 2011-07-20
Category : Technology & Engineering
ISBN : 0309212111

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The ongoing development of military aerospace platforms requires continuous technology advances in order to provide the nation's war fighters with the desired advantage. Significant advances in the performance and efficiency of jet and rocket propulsion systems are strongly dependent on the development of lighter more durable high-temperature materials. Materials development has been significantly reduced in the United States since the early 1990s, when the Department of Defense (DOD), the military services, and industry had very active materials development activities to underpin the development of new propulsion systems. This resulted in significant improvements in all engine characteristics and established the United States in global propulsion technology. Many of the significant advances in aircraft and rocket propulsion have been enabled by improved materials and, materials manufacturing processes. To improve efficiency further, engine weight must be reduced while preserving thrust. Materials Needs and Research and Development Strategy for Future Military Aerospace Propulsion Systems examines whether current and planned U.S. efforts are sufficient to meet U.S. military needs while keeping the U.S. on the leading edge of propulsion technology. This report considers mechanisms for the timely insertion of materials in propulsion systems and how these mechanisms might be improved, and describes the general elements of research and development strategies to develop materials for future military aerospace propulsion systems. The conclusions and recommendations asserted in this report will enhance the efficiency, level of effort, and impact of DOD materials development activities.

Author : N. L. Klein
Publisher :
Page : 11 pages
File Size : 42,74 MB
Release : 1950
Category : Lubricating oils
ISBN :

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There has been considerable speculation during the past year concerning revision of U. S. Army Specification 2-104B. The need for revision has been recognized by all those who are familiar with the progress of the qualification program under the provisions of the specification.

Author : Amir S. Gohardani
Publisher : Nova Science Publishers
Page : 0 pages
File Size : 30,33 MB
Release : 2014
Category : Airplanes
ISBN : 9781629485881

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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.

Author : J. L. Birkler
Publisher :
Page : 20 pages
File Size : 19,90 MB
Release : 1984
Category : Airplanes
ISBN :

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To operate in the more stringent combat environments of the future, future propulsion systems will have to be more reliable, durable and maintainable. The development community has already responded with many initiatives to address the reliability and durability problems that became apparent during the 1970s. Consequently, the first half of this paper will discuss instead design features that may enhance maintainability and assess the extent to which they have been incorporated in existing engines. The second half of the paper assesses how demands for more supportable engines are influencing the amount of testing and the calendar time required to develop new engines for use in fighter and attack aircraft.

Author :
Publisher :
Page : 93 pages
File Size : 22,19 MB
Release : 1977
Category : Aircraft gas-turbines
ISBN :

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Recent short-term commodity shortages and the potential for interruption of our supplies have caused concern that future U.S. defense systems may become increasingly dependent on materials that are potentially in short supply. This study inquires specifically into the prospects for material to be applied in the first stage turbine of man-rated military aircraft in 1990. The set of candidate material technologies that are in prospect is defined, and the component materials of these technologies that are potentially future supply problems are determined. A methodology was developed to combine the range of technology risks with the range of materials availability risks and overall comparisons were made. Due to the significant availability risks of chromium (as a necessary constituent of superalloys), ceramic materials appear to have the lowest long-term risks for high temperature engines. (Author).

Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
Page : 123 pages
File Size : 40,13 MB
Release : 2016-08-09
Category : Technology & Engineering
ISBN : 0309440998

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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.