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NASA REFAN PROGRAM STATUS
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English
Abstract
The objective of the refan program is to demonstrate the technical feasibility of substantially reducing the noise levels of existing JT8D powered aircraft. The program consists of the design, manufacturing and testing of the refan engines and modified nacelles and airplanes. Experimental testing has been completed for the refan engine both at sea level and at altitude conditions. Ground testing for the B727 side- and center-engine installations and flight testing of the DC-9 with refan engines and acoustic nacelles have been performed. Analyses of the test results are in progress. Preliminary results presented in this paper show that substantial noise reductions were achieved.
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Citation
Abdalla, K. and Yuska, J., "NASA REFAN PROGRAM STATUS," SAE Technical Paper 750592, 1975, https://doi.org/10.4271/750592.Also In
References
- Sams E. W. Bresnahan D. L. “Refan Program. Phase I: Summary Report.” National Aeronautics and Space Administration Oct. 1973
- Stitt L. E. Medeiros A. A. “Reduction of JT8D Powered Aircraft Noise by Engine Refanning.” Air Transport Meeting Dallas, Tex. Apr. 30 May 2 1974
- “JT8D-100 Turbofan Engine, Phase I --Noise Reduction.” Pratt and Whitney Aircraft 1974 NASA CR-134654
- “DC-9/JT8D Refan Phase I --- Technical and Economic Feasibility of Retrofitting DC-9 Aircraft with Refan Engine To Achieve Desired Acoustic Levels.” Douglas Aircraft Co., Inc. Nov. 1973 NASA CR-121252
- “Program on Ground Test of Modified, Quiet, Clean, JT3D and JT8D Turbofan Engines in Their Respective Nacelles --- Modification of Boeing 707, 727, and 737 Aircraft for Aircraft Noise Reduction.” Boeing Commercial Airplane Co. Sept. 1973 NASA CR-134553