Research for Fighter Aircraft
July 1, 1996
The Consolidated Automated Support System (CASS) is a computerized Automatic Test Equipment (ATE) systems that is currently being fielded by the Department of the Navy. Over the next several years, CASS will replace existing ATE systems and help the Navy standardize test and training procedures. The Director of the Navy' s Air Warfare Division (N88) and the Support Equipment Program Office (PMA-260) asked CNA to review the Navy s current plans for CASS implementation within the fleet. These plans call for the phase integration of CASS into both Navy and Marine Corps maintenance facilities. This paper examines CASS requirements for supporting avionics components at shore-based Regional Maintenance Centers (RMCs). Specifically, our sponsor wanted to know: how many CASS stations do RMCs need; and how many of each type of CASS stations do they need? We address these questions by examining the planned RMC support for (only) F/A-18 and F-14 aircraft at Oceana.
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April 1, 1993
The Gulf War was an impressive demonstration of air power in action. Coalition air forces seized control of the air in the first hours, then devastated military facilities in Iraq and Iraqi forces in the field -- paving the way for the remarkable 100-hour victory by coalition ground forces. Airpower did not win the war by itself, but it was the foundation for projecting U.S. military power and overcoming numerical disadvantages on the ground. Airpower is likely to play a similar key role in the next major regional conflict. Thus, the U.S. must maintain its superiority in airpower despite rising costs and declining budgets. The issues are complex and controversial, but ignoring issues will not make them go away. This paper discusses policy and concept issues that need debate and examines two broad strategies for dealing with affordability problems.
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June 1, 1987
Principal components analysis is applied to nine indicators of aircraft reliability, maintainability, and safety. The indicators are standard readiness measures such as mean time between failure at different points in the aircraft's career. The data are adjusted to include only the airframe. The assumption behind the analysis is that the observable variables are indicators of an underlying unobservable variable, 'airframe quality.' This principal components analysis provides a quality 'score' for each aircraft. Five of the six aircraft analyzed fall within one standard deviation of the average score. The scores for the first principal component account for over 85 percent of the variation in the original indicators, which is highly significant in a statistical sense. This finding supports the initial hypothesis; 'quality' exists and is the major source of variation across aircraft in the nine indicators.
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January 1, 1979
This paper analyzes the dynamic interactions involved in air combat maneuvering using a continuous analysis technique. An appendix summarizes U.S. and foreign fighter performance comparisons.
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August 1, 1974
This research contribution addresses the problem of explicitly taking into account uncertainty about the demand for spare parts in making inventory procurement and stockage decisions. The model described provides for a unified treatment of the closely related problems of statistical estimation of demand and resource allocation within the inventory system, and leads to an easily implemented, efficient method of determining requirements for spare parts both in the early provisioning phase and in later periods of operations when demand data has accumulated.
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August 1, 1974
When a new aircraft, such as the F-14, is being bought, decisions on the quantities of spare parts to be bought are made even though information on expected demands, operating programs, and the final configuration of the aircraft is limited. For high-value, low-usage parts, which are those considered, the minimum-cost strategy might be to defer procurement until demands occur. During the period of deferral, the Navy would buy the needed spare parts from a stock carried by the manufacturer or from the production line if no stock is held. This paper describes an algorithm for determining in what cases this would be the best policy.
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June 1, 1974
In this paper, a model is described which determines the effect of shortrun repair resources upon the process time, and hence the pipeline of, F-4s at North Island.
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June 1, 1974
The purpose of this analysis is to determine the relationship between the cost of the resource inputs employed by Naval aviation squadrons and the level of output produced by them. A production function, relating the level of squadron output to the levels of inputs used, is estimated econometrically, using nonlinear estimation techniques. The combination of inputs producing the maximum output, given a budget constraint, is then determined analytically.
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June 1, 1974
This paper describes a method for determining optimal repair and replacement policies for aircraft, with specific reference to the F-4. The objective of the analysis is to choose the set of policies from all possible alternatives over a finite planning horizon which minimizes the cost of operations. A dynamic program is presented which seeks an optimal path through a series of decision periods, when each period begins with the choice of keeping an aircraft, reworking it before further operation, or buying a new one.
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June 1, 1974
This paper demonstrates how to determine the minimal cost combination of end products and investment in repair service capability in order to maintain a given level of operating end products. The model is then applied to the problem of determining the optimal size of the Navy's F-4 aircraft pipeline.
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