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Military Jet Engine Acquisition Technology Basics and Cost-Estimating Methodology

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Military Jet Engine Acquisition Technology Basics and Cost-Estimating Methodology ( military-jet-engine-acquisition-technology-basics-and-cost-e )

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Modern Tactical Jet Engines 145 of laminated layers of high-temperature perforated metal materials. Compressor bleed air is blown into and through the Lamilloy com- ponents to effect transpiration-like cooling of those components. Also included are counter-rotating high- and low-pressure spools, without the traditional stationary turbine vanes between the turbine rotors. The shafts will turn on bidirectional tapered roller bearings. The F120 will have an advanced afterburner, based on technologies from GE’s F414 engine, used in the F/A-18 E/F (Kandebo, 1997). The nozzle will be an advanced low-observable axi-symmetric nozzle, which GE states will have half of the weight and 40 percent of the cost of a 2-D nozzle (Kandebo, 1996a). SUMMARY The United States continues to lead the world in fielding state-of- the-art jet engines. The implications of integrating new technologies into military aircraft engines are both positive and negative. The De- partment of Defense and industry are making a concerted effort to enhance affordability, extend component life, increase reliability, automate prognostics and diagnostics, simplify maintenance proce- dures, and enhance performance. However, the continuous integra- tion of new technologies into existing and new engines, and expand- ing flight envelopes, will likely continue to create a corresponding flow of technical challenges and costs. We hope the brief descrip- tions we supplied in this report of some current and future U.S. tacti- cal aircraft jet engines will assist military weapons system program office personnel in understanding military jet engines and estimating their life-cycle costs.

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