Download or read book The Effects of Advanced Materials on Airframe Operating and Support Costs written by and published by . This book was released on 2003 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced materials particularly polymer composites and titanium are increasingly being used in the airframes of high-performance military aircraft. With that in mind, this study concentrates on answering a fundamental question: Do advanced airframe materials cost more to maintain than aluminum, which has historically been the most common material used in airframe structures? Although considerable effort has been devoted to understanding the acquisition costs of advanced materials, very little is known about their operating and support (O & S) costs after an aircraft is fielded and fully operational. In an effort to gain a better understanding of advanced-material O & S costs, we produced a methodology for forecasting those costs, which we present in this documented briefing.
Download or read book The Effects of Advanced Materials on Airframe Operating and Support Costs written by Raj Raman and published by RAND Corporation. This book was released on 2003 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents a methodology for forecasting operating and support costs for airframe parts made form advanced materials versus parts made from aluminum.
Download or read book Military Airframe Costs The Effects of Advanced Materials and Manufacturing Processes written by and published by . This book was released on 2001 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Good cost estimates can make important contributions to effective acquisition policy. RAND has a long history of producing cost-estimating methodologies. Two of its more recent studies are Hess and Romanoff (1987) and Resetar, Rogers, and Hess (1991). This report both updates and extends these earlier studies, focusing on the effects of material mix, manufacturing technique, and part geometric complexity on cost. We collected two types of information on these effects. First, we surveyed the military airframe industry for estimates of how aircraft production costs vary with airframe structure material mix. Second, we analyzed a large set of actual part data from recent aircraft manufacturing efforts that we collected from industry. We also estimated a set of airframe relationships (CERs) for labor hours based on MACDAR, a historical airframe database. We then integrated the effects of material mix into these estimates.
Download or read book Military Airframe Costs written by Obaid Younossi and published by Rand Corporation. This book was released on 2001 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, a number of attempts have been made to estimate the cost of future weapon systems toward the goal of optimizing acquisition policy. This report focuses specifically on the effects of material mix, manufacturing techniques, and geometric part complexity on the cost of military airframes. It begins by offering background information on those materials that are most critical to airframe manufacture and on the relative advantages of both traditional and evolving part fabrication techniques. It then proceeds to a quantitative analysis of the cost implications of various materials and manufacturing techniques on airframe production, drawing both from an industry survey and from analysis of industry data. The data thus derived are then integrated with those of a comprehensive historical database. The report concludes that composites, while offering a number of advantages over metals in airframe manufacture, are generally associated with higher costs across a range of categories. At the same time, it concludes that while new manufacturing technologies hold the potential to diminish airframe manufacturing costs, the increased airframe complexity of future fighter aircraft may well offset this advantage. The report recommends that cost analysts remain abreast of changes in industry practice so that they may more accurately gauge the potential effects of such changes on future airframe costs.
Download or read book New Materials for Next Generation Commercial Transports written by National Research Council and published by National Academies Press. This book was released on 1996-03-15 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major objective of this book was to identify issues related to the introduction of new materials and the effects that advanced materials will have on the durability and technical risk of future civil aircraft throughout their service life. The committee investigated the new materials and structural concepts that are likely to be incorporated into next generation commercial aircraft and the factors influencing application decisions. Based on these predictions, the committee attempted to identify the design, characterization, monitoring, and maintenance issues that are critical for the introduction of advanced materials and structural concepts into future aircraft.
Download or read book Selected Rand Abstracts written by Rand Corporation and published by . This book was released on 2003 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes publications previously listed in the supplements to the Index of selected publications of the Rand Corporation (Oct. 1962-Feb. 1963).
Download or read book Advanced Airframe Structural Materials written by Susan A. Resetar and published by Rand Corporation. This book was released on 1991 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report identifies, describes, and quantifies the cost effects of structural materials that are likely to be incorporated into aircraft becoming operational in the 1990s (aluminum, aluminum-lithium, steel, titanium, graphite/epoxy, graphite/bismaleimide, and graphite/thermoplastic). The authors present a primer for advanced aircraft structural materials emphasizing polymer matrix composites. They then present both cost data and a cost estimating methodology sensitive to material mix. For each material type, they present separate cost factors for two time frames (the late 1980s and the mid-1990s) and for the following cost elements: nonrecurring engineering, nonrecurring tooling, recurring engineering, recurring tooling, manufacturing labor, manufacturing material, and quality assurance. Although composites offer advantages, including reduced weight, reduced number of fasteners, increased corrosion resistance, reduced radar cross-section, and the potential for extended life, the cost data show that composite materials are more expensive than aluminum on a cost-per-pound basis.
Download or read book ASME 67 WA AV 5 written by C. W. Matt and published by . This book was released on 1967 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Guide for the Consideration of Composite Material Impacts on Airframe Costs written by Jeffrey L. Isom and published by . This book was released on 1991 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study provides a guide to cost analysts who must consider the impact of composite materials on airframe costs. A literature review was conducted to determine the availability of cost models which incorporate the effect of composites on cost. A number of models are available, but no individual model was found that is applicable for every situation. In order to provide a baseline upon which analysts can compare model results as well as provide guidance in selecting cost drivers, a Delphi survey was conducted. Questionnaire results indicate that composite weight (as a percentage of total weight), composite part complexity, percentage of composites in load-bearing role, composite part size, fabrication technique, and percentage of composites in a low observable role are all potentially significant cost drivers. Delphi results also indicate that engineering and quality assurance labor hours are quite sensitive to composite weight, while manufacturing and tooling hours are more sensitive to composite part complexity. Finally, the Delphi results indicate that, although there are some differences in composite labor hour impacts across aircraft type, there are no discernable patterns to the differences.
Download or read book Advanced Materials in Aerospace Engineering written by José Divo Bressan and published by . This book was released on 2016-02 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this special issue is to present the latest findings and promote further research in the areas of advanced materials in aerospace engineering. Nowadays, two related imperatives are influencing the design of aeronautical structures:1. Requirements for more efficient aircraft (use of advanced lightweight materials, reduction of life cycle costs and particularly operating costs),2. Requirements to reduce the influence of aircraft on environmental, including the decreasing of gas pollution and noise.
Download or read book A Guide for the Consideration of Composite Material Impacts on Airframe Costs written by Jeffrey L. Isom and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study provides a guide to cost analysts who must consider the impact of composite materials on airframe costs. A literature review was conducted to determine the availability of cost models which incorporate the effect of composites on cost. A number of models are available, but no individual model was found that is applicable for every situation. In order to provide a baseline upon which analysts can compare model results as well as provide guidance in selecting cost drivers, a Delphi survey was conducted. Questionnaire results indicate that composite weight (as a percentage of total weight), composite part complexity, percentage of composites in load-bearing role, composite part size, fabrication technique, and percentage of composites in a low observable role are all potentially significant cost drivers. Delphi results also indicate that engineering and quality assurance labor hours are quite sensitive to composite weight, while manufacturing and tooling hours are more sensitive to composite part complexity. Finally, the Delphi results indicate that, although there are some differences in composite labor hour impacts across aircraft type, there are no discernable patterns to the differences.
Download or read book RAND Research Brief New Processes for the Estimation of Military Airframe Costs written by and published by . This book was released on 2001 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the end of the Cold War, large-scale reductions in defense allocations have prompted both the Department of Defense and Congress to place an increasingly high premium on the affordability of weapon systems. Yet many aircraft contractors and government program managers have long maintained that government cost estimators have consistently overestimated the costs of such systems by virtue of their reliance on outdated forecasting methodologies. The generation of more timely cost-estimating models would thus appear to form the cornerstone of sound acquisition policy. In Military Airframe Costs: The Effects of Advanced Materials and Manufacturing Processes, RAND researchers Obaid Younossi, Michael Kennedy, and John C. Graser address this issue by updating existing cost-estimating methodologies in the critical area of military airframes. After providing basic background information on the various materials that are used to produce airframe structures, the authors discuss the relative advantages of both traditional and evolving manufacturing techniques. Drawing from an industry survey as well as from part-manufacturing data, they then analyze how the cost of producing airframe structures varies with material mix, manufacturing technique, and part geometric complexity. The data thus derived are then integrated with those from a comprehensive historical cost database to yield a more accurate means of generating airframe cost projections.
Download or read book Cost benefit Analysis of Advanced Materials Technologies for Future Aircraft Turbine Engines written by and published by . This book was released on 1980 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rational Accidents written by John Downer and published by MIT Press. This book was released on 2024-01-16 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: An unflinching look at the unique challenges posed by complex technologies we cannot afford to let fail—and why the remarkable achievements of civil aviation can help us understand those challenges. Nuclear reactors, deep-sea drilling platforms, deterrence infrastructures—these are all complex and formidable technologies with the potential to fail catastrophically. In Rational Accidents, John Downer outlines a new perspective on technological failure, arguing that undetectable errors can lurk in even the most rigorous and “rational” assessments of these systems due to the inherent limits of engineering tests and models. Downer finds that it should be impossible, from an epistemological viewpoint, to achieve the near-perfect reliability that we require of our most safety-critical technologies. There is, however, one such technology that demonstrably appears to achieve these “impossible” reliabilities: jetliners. Downer looks closely at civil aviation and how it has reckoned with the problem of failure. He finds that the way we conceive of jetliner reliability hides the real practices by which it is achieved. And he shows us why those practices are much less transferrable across technological domains than we are led to believe. Fully understanding why jetliners don't crash, he concludes, should lead us to doubt the safety of other “ultra-reliable” technologies. A unique and sobering exploration of technological reliability from an STS perspective, Rational Accidents is essential reading for understanding why our most safety-critical technologies are even more dangerous than we believe.
Download or read book Paper written by and published by . This book was released on 1991 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials Structures and Manufacturing for Aircraft written by Melih Cemal Kuşhan and published by Springer Nature. This book was released on 2022-04-25 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comprehensive look at materials science topics in aerospace, air vehicle structures and manufacturing methods for aerospace products, examining recent trends and new technological developments. Coverage includes additive manufacturing, advanced material removal operations, novel wing systems, design of landing gear, eco-friendly aero-engines, and light alloys, advanced polymers, composite materials and smart materials for structural components. Case studies and coverage of practical applications demonstrate how these technologies are being successfully deployed. Materials, Structures & Manufacturing for Aircraft will appeal to a broad readership in the aviation community, including students, engineers, scientists, and researchers, as a reference source for material science and modern production techniques.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
