Dec 9 1969
From The Space Library
LeRC Director Bruce T. Lundin discussed future interest in transonic speed range-mach 0.7 to mach 1.4-before House Committee on Science and Astronautics, Subcommittee on Advanced Research and Technology during hearings on U.S. aeronautical activities: "Cruise speeds of commercial and military transports have already reached about Mach 0.85, and further increases to about Mach 1.15 are of interest because this speed can be attained without sonic boom effects. The transonic speed range is also critical for a supersonic transport because performance in this range determines subsonic cruise efficiency. Transonic speed characteristics are important to fighter aircraft because they are required to maneuver at these speeds, and they are important to bomber aircraft because they affect the engine size which is necessary to accelerate to higher supersonic speeds. . . . It is in this speed range that many interactions, shock waves, and flow separations occur that become important to the thrust, drag, and stall margin of the engine and on the lift, drag and buffet characteristics of the aircraft. Unfortunately, mathematical prediction techniques do not work well in this speed range and experimental testing becomes of major importance." Only very small models could be used in transonic tunnels "and scaling up results from very small models to full size airplanes is at best difficult and usually impossible. We will be paced here for some time to come by the capabilities of our experimental facilities." (Testimony)
Sen. Robert J. Dole (R-Kans.) introduced S.R. 167 "providing for the display in the Capitol Building of a portion of the moon." Resolution was referred to Senate Committee on Rules and Administration. (CR, 12/9/69, 516142)
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