Aircraft Airframe Cost Estimating Relationships PDF Download
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Author: Ronald Wayne Hess
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages : 118
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Book Description
This report presents generalized equations for estimating the development and production costs of aircraft airframes. It provides separate cost estimating relationships (CERs) for engineering, tooling, manufacturing labor, and quality-control hours; manufacturing material, development support, and flight-test cost; and total program cost. The CERs, expressed in the form of exponential equations, were derived from a database consisting of 34 military aircraft with first flight dates ranging from 1948 to 1978. In addition to the basic objective of developing an updated set of airframe CERs, the study also examined three specific possibilities for improving CER accuracy: (1) stratifying the full estimating sample into subsamples representing major differences in aircraft type; (2) incorporating variables describing program structure and airframe construction characteristics; and (3) for the fighter aircraft only, incorporating an objective technology index into the equations.
Author: Ronald Wayne Hess
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages : 118
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Book Description
This report presents generalized equations for estimating the development and production costs of aircraft airframes. It provides separate cost estimating relationships (CERs) for engineering, tooling, manufacturing labor, and quality-control hours; manufacturing material, development support, and flight-test cost; and total program cost. The CERs, expressed in the form of exponential equations, were derived from a database consisting of 34 military aircraft with first flight dates ranging from 1948 to 1978. In addition to the basic objective of developing an updated set of airframe CERs, the study also examined three specific possibilities for improving CER accuracy: (1) stratifying the full estimating sample into subsamples representing major differences in aircraft type; (2) incorporating variables describing program structure and airframe construction characteristics; and (3) for the fighter aircraft only, incorporating an objective technology index into the equations.
Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 784
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Book Description
Author: Joseph P. Large
Publisher:
ISBN:
Category : Aircraft industry
Languages : en
Pages : 72
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Book Description
This document examines a sample of seven aircraft airframe cost models. The intent is to determine whether the model output is reasonable over a broad range of inputs, what limitations should be noted, and where one model might be preferable to the others. The critique shows that all the models have some deficiencies and all should be used with caution. The more recent models appear to be better than the older ones, which may be taken as a sign of progress, but it is plain that more progress is needed. Some of the lessons learned in this review may be helpful in pointing out how the next generation of aircraft airframe cost models could be improved.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309179130
Category : Technology & Engineering
Languages : en
Pages : 192
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Book Description
Because of the important national defense contribution of large, non-fighter aircraft, rapidly increasing fuel costs and increasing dependence on imported oil have triggered significant interest in increased aircraft engine efficiency by the U.S. Air Force. To help address this need, the Air Force asked the National Research Council (NRC) to examine and assess technical options for improving engine efficiency of all large non-fighter aircraft under Air Force command. This report presents a review of current Air Force fuel consumption patterns; an analysis of previous programs designed to replace aircraft engines; an examination of proposed engine modifications; an assessment of the potential impact of alternative fuels and engine science and technology programs, and an analysis of costs and funding requirements.
Author: United States. Department of Defense
Publisher:
ISBN:
Category : Cost effectiveness
Languages : en
Pages : 104
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Book Description
Author: B. Dhillon
Publisher: Routledge
ISBN: 113677386X
Category : Business & Economics
Languages : en
Pages : 373
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Book Description
Product acquisition involves an examination of the support cost of major equipment over its total life years. Depending on the type of equipment, support costs may range from 10 to 100 times the cost of acquisition. 'Life Cycle Costing: Techniques, Models and Applications' offers a comprehensive approach to the entire field, and treats it in such a way that the reader requires no previous knowledge to understand the contents. It covers all advances and recent progress in life cycle costing from its history and definitions to current approaches. It is fully referenced for deeper study in any specific area (there are over 1150 references with an appendix) and contains more than 50 examples with their solutions. Subjects covered include reliability improvement warranty, computer hardware and software costing, vehicles life cycle costing, reliability engineering, life cycle costing in the aircraft industry, and processing systems costing. This work is intended for all engineers and senior students of engineering or business administration, administrators, cost analysts, researchers, academics, and anyone involved with equipment procurement.
Author:
Publisher:
ISBN:
Category : Aeronautics, Commercial
Languages : en
Pages : 800
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Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 76
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Book Description
Author: Obaid Younossi
Publisher: Rand Corporation
ISBN: 9780833030368
Category : History
Languages : en
Pages : 141
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Book Description
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.
Author:
Publisher:
ISBN:
Category : Parameter estimation
Languages : en
Pages : 434
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Book Description
