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NASA Technical Reports Server (NTRS) 19960038443: Wind-tunnel devel... |
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by NASA Technical Reports Server (NTRS) |
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A flight experiment has been proposed to investigate the |
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performance of an aerospike rocket motor installed in a |
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lifting body configuration. An SR-71 airplane would be |
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used to carry the aerospike configuration to the desired |
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flight test conditions. Wind-tunnel tests were completed |
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on a 4-percent scale SR-71 airplane with the aerospike |
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pod mounted in various locations on the upper fuselage. |
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Testing was accomplished using sting and blade mounts |
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from Mach 0.6 to Mach 3.2. Initial test objectives |
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included assessing transonic drag and supersonic lateral- |
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directional stability and control. During these tests, |
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flight simulations were run with wind-tunnel data to |
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assess the acceptability of the configurations. Early |
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testing demonstrated that the initial configuration with |
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the aerospike pod near the SR-71 center of gravity was |
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unsuitable because of large nosedown pitching moments at |
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transonic speeds. The excessive trim drag resulting from |
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accommodating this pitching moment far exceeded the |
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excess thrust capability of the airplane. Wind-tunnel |
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testing continued in an attempt to find a configuration |
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suitable for flight test. Multiple configurations were |
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tested. Results indicate that an aft-mounted model |
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configuration possessed acceptable performance, |
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stability, and control characteristics. |
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Date Published: 2016-10-13 07:16:23 |
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Identifier: NASA_NTRS_Archive_19960038443 |
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Item Size: 23424868 |
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Language: english |
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Media Type: texts |
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