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United States. Government Accountability Office. - One of the best experts on this subject based on the ideXlab platform.
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Joint Strike Fighter: DOD Actions Needed to Further Enhance Restructuring and Address Affordability Risks
United States. Government Accountability Office., 2012Co-Authors: United States. Government Accountability Office.Abstract:A letter report issued by the Government Accountability Office with an abstract that begins "Joint Strike Fighter restructuring continued throughout 2011 and into 2012, adding to cost and schedule. The new program baseline projects total acquisition costs of $395.7 billion, an increase of $117.2 billion (42 percent) from the prior 2007 baseline. Full rate production is now planned for 2019, a delay of 6 years from the 2007 baseline. Unit costs per aircraft have doubled since start of development in 2001. Critical dates for delivering warFighter requirements remain unsettled because of program uncertainties. While the total number of aircraft DOD plans to buy has not changed, it has for 3 straight years reduced near-term procurement quantities, deferring aircraft and costs to future years. Since 2002, the total quantity through 2017 has been reduced by three-fourths, from 1,591 to 365. Affordability is a key challengeannual acquisition funding needs average about $12.5 billion through 2037 and life-cycle operating and support costs are estimated at $1.1 trillion. DOD has not thoroughly analyzed program impacts should funding expectations be unmet.
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Defense Acquisitions: Assessments of Selected Weapon Programs
United States. Government Accountability Office., 2012Co-Authors: United States. Government Accountability Office.Abstract:A letter report issued by the Government Accountability Office with an abstract that begins "The total estimated cost of the Department of Defenses (DOD) 2011 portfolio of 96 major defense acquisition programs stands at $1.58 trillion. In the past year, the total acquisition cost of these programs has grown by over $74.4 billion or 5 percent, of which about $31.1 billion can be attributed to factors such as inefficiencies in production, $29.6 billion to quantity changes, and $13.7 billion to research and development cost growth. DODs portfolio is dominated by a small number of programs, with the Joint Strike Fighter accounting for the most cost growth in the last year, and the largest projected future funding needs. The majority of the programs in the portfolio have lost buying power in the last year as their program acquisition unit costs have increased. The number of programs in the portfolio has decreased from 98 to 96 in the past year and, looking forward, is projected to decrease again next fiscal year to its lowest level since 2004.
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Joint Strike Fighter: Implications of Program Restructuring and Other Recent Developments on Key Aspects of DOD's Prior Alternate Engine Analyses
United States. Government Accountability Office., 2011Co-Authors: United States. Government Accountability Office.Abstract:Correspondence issued by the Government Accountability Office with an abstract that begins "After supporting a Joint Strike Fighter (JSF) acquisition strategy that called for a competitive engine development of the F135 and F136 engines, the Department of Defense (DOD) stopped requesting funding for the F136 alternate engine in its fiscal year 2007 budget request, but the Congress continued to fund it through the 2010 budget. In February 2010, DOD projected that it would cost an additional $2.9 billion through 2016 to support an alternate engine program. DOD decided that an engine competition would not likely generate enough long-term savings to justify this up-front investment and subsequently terminated the alternate engine program. In 2010, at congressional request, we reviewed the basis for DOD's $2.9 billion funding projection and reported that the projection did not include the same level of fidelity and precision normally associated with a detailed, comprehensive cost estimate and that the amount of up-front investment needed could be lower if two key assumptions in DOD's analysis were changed. Moreover, since DOD's projection and our last review, several fundamental changes in the JSF aircraft and engine programs have taken place. We examined the potential implications of these changes to the $2.9 billion funding projection. We also examined the potential implications for DOD's broader cost-benefit analysis that captures the long-term costs and benefits of the competitive engine program.
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Joint Strike Fighter: Restructuring Places Program on Firmer Footing, but Progress Is Still Lagging
United States. Government Accountability Office., 2011Co-Authors: United States. Government Accountability Office.Abstract:Testimony issued by the Government Accountability Office with an abstract that begins "The F-35 Lightning II, also known as the Joint Strike Fighter (JSF), is the Department of Defense's (DOD) most costly and ambitious aircraft acquisition, seeking to simultaneously develop and field three aircraft variants for the Air Force, Navy, Marine Corps, and eight international partners. The JSF is critical for recapitalizing tactical air forces and will require a long-term commitment to very large annual funding outlays. The estimated total investment cost is currently about $385 billion to develop and procure 2,457 aircraft. Because of a history of relatively poor cost and schedule outcomes, defense leadership over the past 15 months has directed a comprehensive restructuring of the JSF program that is continuing. This testimony draws substantially from our extensive body of work on the JSF including our April 2011 report, the latest annual review mandated in the National Defense Authorization Act for Fiscal Year 2010, Pub. L. No. 111-84 244 (2009). This testimony discusses (1) program cost and schedule changes and their implications on affordability; (2) progress made during 2010; (3) design and manufacturing maturity; and (4) test plans and progress. GAO's work included analyses of a wide range of program documents and interviews with defense and contractor officials.
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Joint Strike Fighter: Restructuring Places Program on Firmer Footing, but Progress Still Lags
United States. Government Accountability Office., 2011Co-Authors: United States. Government Accountability Office.Abstract:A letter report issued by the Government Accountability Office with an abstract that begins "The F-35 Lightning II, also known as the Joint Strike Fighter (JSF), is the Department of Defense's (DOD) most costly and ambitious aircraft acquisition, seeking to simultaneously develop and field three aircraft variants for the Air Force, Navy, Marine Corps, and eight international partners. The JSF is critical for recapitalizing tactical air forces and will require a long-term commitment to very large annual funding outlays. The current estimated investment is $382 billion to develop and procure 2,457 aircraft. This report, prepared in response to a congressional mandate in the National Defense Authorization Act for Fiscal Year 2010, discusses (1) program cost and schedule changes and their implications on affordability; (2) progress made during 2010; (3) design and manufacturing maturity; and (4) test plans and progress. GAO's work included analyses of a wide range of program documents and interviews with defense and contractor officials.
Gertler Jeremiah - One of the best experts on this subject based on the ideXlab platform.
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F-35 Joint Strike Fighter (JSF) Program
Library of Congress. Congressional Research Service., 2014Co-Authors: Gertler JeremiahAbstract:This report discusses the F-35 Joint Strike Fighter (JSF), also called the Lightning II, which is a Strike Fighter airplane being procured in different versions for the Air Force, Marine Corps, and Navy. The F-35 program is DOD's largest weapon procurement program in terms of total estimated acquisition cost
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Fiscal Year 2015
Library of Congress. Congressional Research Service., 2014Co-Authors: Gertler JeremiahAbstract:This report provides background on the F-35 Joint Strike Fighter (JSF) program and discusses spending during FY2014 and the proposed budget for FY 2015
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F-35 Alternate Engine Program: Background and Issues for Congress
Library of Congress. Congressional Research Service., 2011Co-Authors: Gertler JeremiahAbstract:This report discusses the past four years of administration proposals to terminate the program to develop the General Electric/Rolls-Royce F136 engine as an alternative to the Pratt & Whitney F135 engine that currently powers the F-35 Joint Strike Fighter (JSF). These proposals have been continually rejected by Congress. The Obama Administration's FY2011 budget submission against proposes to terminate the program. This report explores both sides of the termination argument
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F-35 Joint Strike Fighter (JSF) Program: Background and Issues for Congress
Library of Congress. Congressional Research Service., 2010Co-Authors: Gertler JeremiahAbstract:This report discusses the largest procurement program in the Department of Defense (DOD), the F-35 Joint Strike Fighter (JSF), also called the Lightning II. This is a new aircraft being procured in different versions for the United States Air Force, Marine Corps, and Navy. Current DOD plans call for acquiring a total of 2,456 JSFs. This report also discusses issues related to the F-35 procurement program within the FY2011 defense budget
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Fiscal Year 2010
Library of Congress. Congressional Research Service., 2010Co-Authors: Gertler JeremiahAbstract:This report discusses the F-35 Joint Strike Fighter (JSF), also called the Lighting II, which is a new Strike Fighter being procured in different versions by the Air Force, Marine Corps, and Navy. It details the Obama Administration's proposed FY2010 defense budget requests for F-35 program funding and outlines the issues that Congress must consider when deciding whether to approve, reject, or modify the administration's funding requests
Naval Air Systems Command - One of the best experts on this subject based on the ideXlab platform.
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wind tunnel investigation of pre production f a 18e lateral characteristics using continuous beta sweep test analysis technique cbstat
AIAA Atmospheric Flight Mechanics Conference and Exhibit, 2004Co-Authors: Hugo A Gonzalez, Stephen P Cook, Terence A Ghee, Alexander Kokolios, Henrik Pettersson, Naval Air Systems CommandAbstract:A transonic wind tunnel test was conducted to evaluate the lateral characteristics of a preproduction F/A-18E configuration using continuous beta sweeps at constant angles of attack. An 8% scale F/A-18E Super Hornet model was tested in the NASA Ames Unitary Plan 11-Foot Wind Tunnel. The pre-production configuration included the solid wingfold fairing that is known to possess abrupt wing stall tendencies. Three leading and trailing edge flap configurations were evaluated at two Mach numbers. Wind tunnel results were then “scored” with the Continuous Beta Sweep Test and Analysis Technique (CBSTAT) developed under the Joint Strike Fighter program. The wind tunnel results revealed hysteresis bands and unsteady rolling moment over different angles of sideslip ranges at Mach numbers, angles of attack, and flap settings that are within the F/A-18E flight envelope. This paper describes the force and moment aerodynamic characteristics from the test and how they were scored. Results from the beta sweeps and analysis technique are compared with traditional figures of merit used to detect abrupt wing stall tendencies. Recommendations on test and analysis techniques that can improve CBSTAT are presented.
Leo Fila - One of the best experts on this subject based on the ideXlab platform.
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the Joint Strike Fighter jsf phm and the autonomic logistic concept potential impact on aging aircraft problems
2003Co-Authors: Simon Henley, Andrew Hess, Leo FilaAbstract:Abstract : The JSF Autonomic Logistics (AL) system is a new supportability concept that will enable the aircraft to be better utilized throughout the life of the platform, and at a lower cost as compared with legacy aircraft. Autonomic Logistics is, simply put, the automation of the logistics environment such that little human intervention is needed to engage the logistics cycle.
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The Joint Strike Fighter (JSF) PHM concept: Potential impact on aging aircraft problems
IEEE Aerospace Conference Proceedings, 2002Co-Authors: Andrew Hess, Leo FilaAbstract:The JSF Autonomic Logistics (AL) system is a new supportability concept that will enable the aircraft to be better utilized throughout the life of the platform, and at a lower cost as compared with legacy aircraft. Autonomic Logistics is, simply put, the automation of the logistics environment such that little human intervention is needed to engage the logistics cycle. Actions that will be automated within the JSF supportability concept include maintenance scheduling, flight scheduling, ordering spare parts, and the like. The cornerstone of Autonomic Logistics is an advanced diagnostic and Prognostics and Health Management (PHM) system. The PHM provides the data, information, and knowledge for initiating the AutoLog chain of events. PHM is the ability of the aircraft to do fault detection (FD), fault isolation (FI), and accommodation real-time on-board the aircraft. Along with this FD/FI capability, some of the other facets of PHM include fault prediction on selected components. parts life usage tracking, fault filtering and reporting, and recommended action to the pilot only when action is necessary. It is intended that in most cases, maintenance actions and lifing decisions will be based on the actual material condition of the equipment components. The proposed architecture of this PHM concept includes a hierarchical approach where data begins at the sensor level and is transported up to area reasoners that turns this data into information about a particular subsystem. From the area reasoner, the information is then passed up to a top level Air Vehicle Reasoner where subsystem information is then fused to give knowledge about the health of the entire air vehicle. Additionally, many of the technologies that are being developed for the JSF PHM suite could be applied to legacy aircraft and would show significant benefits in respect to LCC and maintainability issues. In many cases, the capability of PHM sensors and prognostic technologies will enable the ability to "see" incipient faults in subsystem components very early prior to their progressing to final system failure. These capabilities will enable accurate useful life remaining predictions and more aggressive health management of assets. Through very accurate tracking of the life usage data for component - parts, the JSF PHM and AL will be able to anticipate many problems that plague current legacy aircraft; giving a lead time to provide fixes before the actual problems become fleet wide and catastrophic. The PHM architecture will directly interface with the Joint Distributed Information System (JDIS), the information system that will enable Autonomic Logistics functions. The JDIS could automatically forward to the Original Equipment Manufacturer (OEM) data on problems that arise within the fleet, thus alerting them to a developing situation sooner, and enabling them to provide faster, cheaper fixes to these problems. With these safeguards in place, the JSF will put itself in a position to quickly react to ageing aircraft problems, increase sortie generation rates, decrease mean time to diagnose faults and failures as well as drastically decrease maintenance costs.
Jeffrey K Mcconnell - One of the best experts on this subject based on the ideXlab platform.
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continuous beta sweep test analysis technique cbstat for predicting wing drop based on static wind tunnel testing
AIAA Atmospheric Flight Mechanics Conference and Exhibit, 2004Co-Authors: Jeffrey K McconnellAbstract:During the development phase of the F-35 Joint Strike Fighter program, an unprecedented level of effort was dedicated to ensuring that the configuration was free from wing drop problems like those that have plagued many modern combat aircraft. Particular emphasis was placed on creating a reliable and efficient method for predicting wing drop using static wind tunnel testing. The culmination of this effort was the Continuous Beta Sweep Test & Analysis Technique (CBSTAT) which was developed and refined during numerous wind tunnel evaluations conducted over a two year period. The merit of the method was initially demonstrated by successfully predicting transonic Free to Roll results for multiple JSF configurations. The success of this correlation led the JSF Program Office (JPO) to approve funding for the evaluation of CBSTAT on other aircraft which have exhibited wing drop in flight. Wind tunnel testing on both the pre-production F/A-18E/F and the Harrier II verified that CBSTAT was successful in identifying regions of the flight envelope where wing drop events have been observed. A full description of the CBSTAT test technique is provided along with lessons learned and recommendations for future application.
