NASA Lewis Research Center, 21000 Brookpark Road, Cleveland, Ohio 44135

A -- ADVANCED SUBSONIC TECHNOLOGY (AST) PROGRAM SOL NRA 95-LERC-2 POC Albert A. Spence, Contracting Officer, (216) 433-2797, MS 500-305 John Rohde, Project Manager, (216) 433-3949, MS 11-3. This NASA Research Announcement (NRA) solicits research proposals that develop technologies relevant to the next generation of U.S. subsonic commercial engine. The major objective of this announcement is to develop propulsion and engine noise reduction technologies that are critical to the U.S. aeropropulsion industry maintaining their competitive advantage in future commercial engine sales. The research and development in this program is directed toward improving the economics of operation and reducing the emissions and noise of future large engine (20k to 100k lb. thrust) and regional engines (5k to 20k lb. thrust) that will enter into commercial service in 2005. The approach to accomplish the objective of this announcement will include the design, development, and testing of technologies and some key propulsion components. The technologies and components will be developed and demonstrated using sub-scale hardware or existing commercial or military engine systems. NASA Lewis Research Center intends to issue this NRA under a TWO-STEP process. The first step is to allow all interested parties including teams thereof, to submit their abstract, describing their ideas and technical approach, including the use of small and small disadvantaged business subcontractors in high-tech areas of the effort, to meet the objectives of this program in their area(s) of expertise. Teaming of interested parties is encouraged to obtain maximum synergy from these efforts. Abstracts will be limited to no more than 15 pages for each area of interest proposed. A ''page'' is one sheet, 8 1/2 inches x 11 inches, with at least one inch margins on all sides, using PICA size type or larger. Multiple pages or foldouts count as an equivalent number of 8 1/2 inch x 11 inch pages. The Government has determined that a minimum goal of 8 percent will be included as part of this NRA. The areas of interest which have been established by NASA-Lewis are identified as follows: Propulsion Related: Reliable and Affordable Control Systems; Low Emission Large Combustors; Low Emission Regional Combustors; Advanced Affordable High Temperature Disk for Large Engines; Advanced Affordable High Temperature Disk for Regional Engines; Develop, Validate and Demonstrate Average Passage Code for Turbomachinery; Develop & Validate Aeroelastic Codes for Turbomachinery; Demonstration Tests for High-Speed Aerolastics; Affordable Turbine Cooling Technology; Turbine Rim Seals/Tip Seals/Secondary Air Flow Management/Methods/Validation; Large Diamter and Compressor Discharge Seals; Compressor/Turbine Interstage Seals including Contacting Seals; Bypass Duct Design Codes for Very Hi-Bypass; Advanced Lubrication/Scavenge System; Health and Usage Monitoring for the Propulsor Drive; and Reliable High Temperature Polymer Matrix Composites for Engines. Engine Noise Reduction Related: Aerodynamic and Aeroacoustic Prediction Codes; Design & Test Fan/Nacelle Models Demonstrating Noise Reduction Technology; Develop & Demonstrate Active Noise Control Concepts to Reduce Fan Source Noise; and Large Scale Demonstrations of Advanced Noise Reductions Concepts. All interested parties including teams thereof, wishing to respond with an abstract should attend a Bidders Conference scheduled for March 20, 1995 at 10:00 AM in the Administration Building Auditorium at the NASA-Lewis Research Center, where ''DRAFT'' copies of the NRA will be made available. If unable to attend said conference, please contact John Rohde in the NASA-Lewis AST Project Office at (216) 433-3949, or Judith Symons at (216) 433-3477 or facismile at (216) 433-5100 and request a copy of said NRA. Upon completion of evaluation of the first step, NASA-Lewis will issue letters of encourgement to those offerors with the most promising abstracts, to proceed with the second step which will request both formal Technical and Business Proposals in the areas of mutual interest. Depending on the funding available and the quality of the abstracts, NASA-Lewis anticipates issuing one or more letters of encourgement in each area of interest. NASA-Lewis will not publish a second CBD notice at the time the letters of encouragement are issued. As part of this notice, all interested parties including teams thereof, planning to attend the Bidders Conference schedule for March 20, 1995 should notify the Lewis AST Project Office by contacting John Rohde at (216) 433-3949 or Judith Symons at (216) 433-3477 or facismile at (216) 433-5100, and provide the following information: (1) Individuals Name, (2) Citizenship; (3) Company Representing. Such information should be received by the NASA-Lewis AST Project Office no later than March 16, 1995. (0068)

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