Investigation at Large Scale of Thrusting Ejector Applications to V/STOL Aircraft,
NATIONAL AERONUATICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
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Ames Research Center, NASA, has been active in several programs which have the objectives of learning to both predict thrusting ejector performance and to package the ejector in tactical aircraft. The Ames 40-by 80-foot Wind Tunnel has been used to evaluate the deHavilland fuselage ejector at large-scale and this wind tunnel and the newer 80- by 120-foot will be used in future programs. These programs will include a the improvement of the fuselage ejector performance b its application to tactical aircraft design through full-scale testing c possibly, the application of the short Alperin diffuser to tactical aircraft and d evaluation of new ejector concepts. To take advantage of the size, the objectives of these investigations will focus on the establishment of a well documented data base and evaluating packaging problems - from seal door design to duct losses. The advantage of the new 80- by 120-foot Wind Tunnel will be to allow the use of 15,000 lb engines for propulsion, for singe or two engine configurations, at moderate airspeeds, for larger aircraft. The ejector designs tested will be continually compared with that of other VSTOL designs in the large-scale testing phase.