Download or read book Method For Estimating the Cost of Aircraft Structural Modification written by Rand Corporation and published by . This book was released on 1976 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Method for Estimating the Cost of Aircraft Structural Modification written by J. L. Birkler and published by RAND Corporation. This book was released on 1981-01-01 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes research into the cost of aircraft structural modifications. Detailed cost and man hour data supplied by the airframe industry permitted derivation of estimating tools for major aircraft components. Separate equations were derived for engineering, tooling, manufacturing, and material cost. The major explanatory variable was always weight. It was hypothesized that structural modification cost could be estimated on the basis of the weight of material added. Estimates of the cost of modification for the B-52, C-141, C-5, and EF-111 were compared with cost data from industry. Considerable informed judgment is required as is a knowledge of such program-specific facts as whether the original production tooling still exists. Rather than a mathematical model, the study describes the kinds of information needed, suggests guidelines, and presents estimating equations for airframe systems and subassemblies. These contribute to an understanding of the estimating problem but do not constitute a general solution. (Author).
Download or read book Aircraft Modifications Cost Analysis Volume 1 written by Dan C. Boger and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the budget for the development and production of new military aircraft tightens, modification of existing aircraft (MOD) has become increasingly important. This shift in emphasis has created a need for a high level parametric cost estimating method to estimate the cost of a MOD program early in the planning cycle. This report is the first volume of a series of reports documenting a multi-year project to support Naval Air Systems Command initiative to develop parametric cost estimating models for MOD programs. This volume provides an overview of the project, including a review of prior studies, the structure of data to be collected, and the forms used in data collection. Due to the proprietary nature of MOD program cost data, distribution of all future volumes of the report series except for the summary volume will be limited to selected Department of Defense agencies only. Military aircraft, Naval air systems command, MOD, Aircraft modification, Cost estimating, Work breakddown structure, Budgets, Acquisition, Government procurement, Naval Aviation Depots(NADEP), Weapon systems. (jg).
Download or read book Weapon System Costing Methodology Improved Structural Cost Analysis written by R. E. Kenyon and published by . This book was released on 1977 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes a study to improve a previously developed weapon system costing methodology for aircraft airframes and basic structures under Contract F33615-72-C-2083. The methodology is part of a preliminary design level technique for the cost estimation flight vehicle structures. Applications of the method have indicated a number of areas where further study and development could be expected to provide an advanced state-of-the-art capability. This study was directed towards that end. The study was limited to the specific changes consisting of (1) development of complexity factors for technologies and materials represented by the advanced strategic bomber wing carry-through box, (2) modification of raw material cost estimating relationships (CERs) to increase sensitivity to material product form and type of scrappage, (3) investigation of additional assembly techniques and adding or modifying corresponding cost estimating factors, (4) modification of existing CERs to include evaluation of variations in the degree of commonality involved, (5) determination of the effect of production rate on recurring production costs, and (6) determination of the variation in learning curve factors due to variation in the type of material or type of construction. Detailed results are described. (Author).
Download or read book A Method of Estimating Class IV Modification Costs for Fighter Aircraft written by United States. Air Force. Logistics Command. Directorate of Cost Analysis and published by . This book was released on 1970 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improving the Efficiency of Engines for Large Nonfighter Aircraft written by National Research Council and published by National Academies Press. This book was released on 2007-07-30 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1967 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Weapon System Costing Methodology for Aircraft Airframes and Basic Structures Volume I Cost Methods Research and Development written by R. E. Kenyon and published by . This book was released on 1973 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the interim results of a study aimed at extending cost estimating techniques developed and demonstrated under a previous contract. The previous study resulted in two separate estimating methods: a trade study and a system costing method. These methods provided two essential estimating capabilities: the capability of assessing the relative difference in the cost of the basic structures attributable to variations in type of construction and material in an iterative fashion to support tradeoff studies during the preliminary design process, and the capability of accurately estimating total airframe costs in manhours and materials for selected design while retaining sensitivity to type of material and construction. (Modified author abstract).
Download or read book NASA SP written by and published by . This book was released on 1990 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weapon System Costing Methodology for Aircraft Airframes and Basic Structures Volume III Cost Data Base written by R. E. Kenyon and published by . This book was released on 1974 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the cost data used as the basis for developing the trade cost estimating technique for aerodynamic surfaces. Other data that has become available in the course of the study is also presented. Raw data and organized data are presented. An ultimate objective of the study with respect to the cost data base is to present back-up data for each individual CER, including both trade study and system costing relationships. The cost trend data that is included was produced under an amendment to the contract. Its intent was to provide a data base for cost estimate evaluation. (Author).
Download or read book A U S Air Force Cost Analysis Cost Estimating Model Program for Use with the TI Programmable 59 Handheld Calculator written by Joe M. Balding and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper documents a Texas Instruments 'TI Programmable 59' calculator program that uses the U.S. Air Force Cost Analysis Cost Estimating (CACE) model described in Air Force Regulation 173-10, Volume I, USAF Cost and Planning Factors, dated 6 February 1975. The CACE model was designed with a 'building block' approach to estimate annual operating costs of aircraft weapon systems. The model is useful to Air Force organizations, other Government agencies, and government contractors for cost analysis, life cycle cost exercises, or studies concerned with cost effectiveness comparisons between weapon systems. The program described in this paper provides the user with a means of using the CACE model with a hand-held programmable calculator, eliminating lengthy manual computation or the necessity of using a computer. With its calculator connected to the Texas Instruments 'PC-100A Print Cradle, ' the program allows the user to select among several cost factor input methods, estimate output formats, and summarization options.
Download or read book Weapon System Costing Methodology for Aircraft Airframes and Basic Structures Volume I Technical Volume written by R. E. Kenyon and published by . This book was released on 1975 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a detailed description of the function and use of two weapon system costing methodologies for aircraft airframes and basic structures developed for the Air Force Flight Dynamics Laboratory for use in conceptual and preliminary designs phases of weapon system development. The methods are a trade study costing method for detailed cost analysis of trades-off between weight, cost, type of construction and type of material and a system costing method for determining the projected cost of a complete airframe within the context of a weapon system development. This volume provides a technical discussion of method development. Tradeoff capability has been provided for a range of alternative structure and material combinations. A technique for independently assessing complexity factors has been developed and demonstrated. Manufacturing costs are separately estimated for the primary elements of substructure: ribs, spars, covers, leading edges, trailing edges, tips, etc. The trade study method provides an iterative capability stemming from a direct interface with design synthesis programs. A detailed cost data base and system for data expansion is provided. The methods are designed for ease in changing cost estimating relationships and estimating coefficients resulting from cost data update. (Author).
Download or read book Aeronautical Engineering written by and published by . This book was released on 1991 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Investigation of learning curve and cost estimation methods for cargo aircraft written by and published by . This book was released on 1967 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learning curves are developed for nine cargo aircraft using log-linear, log-quadratic, and log-cubic forms with best results being obtained with the log-quadratic. Estimating relations for the prediction of new aircraft costs are derived using current methods and tested for accuracy on the original sample and on the C-141A; a cost prediction for the C-5A is also obtained. Predictions were also obtained using a recent RAND Corporation developed equation. Predictive accuracy in all cases was poor and the conclusion was reached that present methods are inadequate for the estimation of direct-labor costs. (Author).
