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Pre-System Acquisition Aircraft Turbine Engine Development 125 The Pre-System Acquisition activity has three phases: Concept and Technology Development, Concept Exploration, and Advanced Component Development. During this period, government/industry teams explore various alternatives to fulfilling a previously estab- lished military mission requirement. The teams work to understand the cost, performance, effectiveness, and risk associated with each of the alternatives identified. Based on these results, the alternatives are refined, preliminary system specifications are outlined, and mission needs are translated into more specific operational requirements. Applicable technologies are then examined, and proposed solu- tions/design approaches are narrowed. Initial engineering design work may be conducted in this phase to support prototyping or sup- port limited demonstrations in an effort to reduce risk, assess the ad- equacy of existing technologies, identify additional technological needs, and evaluate the relative effectiveness of and further refine proposed design alternatives. In the case of military engine development, extensive core design work is done at this point. Individual engine components (fan, com- pressor, combustor, turbine, augmentor) are designed, built, and tested on rigs to demonstrate their functionality. Control systems are designed to enable the individual components to function together as a whole engine. Full-scale engine functionality is also demon- strated.6 Systems Acquisition At this point, the weapon system development program gains ap- proval to enter the Systems Acquisition activity. The first part of Sys- tems Acquisition is the System Development and Demonstration phase, where the most promising design approach is fully developed. ______________ 6In the earlier acquisition model, most of the early design and integration work, tech- nology transitioning from concept exploration, and prototyping were done during the program development and risk reduction phase. Historical data show the typical du- ration of the program development and risk reduction phase to be two to four years, depending on system complexity. In an attempt to reduce risk and achieve higher confidence before commitment of EMD funds, the duration of the Program Definition and Risk Reduction phase has increased over time.PDF Image | Military Jet Engine Acquisition Technology Basics and Cost-Estimating Methodology
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