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This report presents tables and graphs of normal shock wave parameters for equilibrium air. Composition of the air behind the shock is also tabulated. The results cover the range of velocities from 2-000 fps to 26, 000 fps in increments of 1000 fps and altitudes from sea level to 300, 000 ft at 10,000-ft intervals. The 1959 ARDC model atmosphere has been used to specify ambient conditions ahead of the shock. An effective specific heat ratio, 7/e , has been tabulated which permits solution of oblique shock waves ,-ccording to the method given in NASA

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Theoretical and experimental studies of the stability of floin air induction systems with high pra-wvre recoveries for boundary-layer suction have been carried out. The boundary-layer flow entering such systeas may have the characteristic of increasing its total head with increasing flow rate for part of the operating range. Thin characteristic produces both static and dynamic instability. The static instability is evidenced by the appearance of unequal flows in ostensibly identical branches of a system. The dynamic instability occurs in the form of regular oscillations of the flow. These oscillations take place at the characteristic f.?equencies of the duct and plenm chamber system, In simple cases, the measur%, frequency shows good agreement with that calculated on the basis of the acott,-theory of the Helmholtz resonatore In the experimental investigation, it wua shown that the installation of splitter plates in a system with a wide slot which exhibited both static and dynamicnstability eliminated the latter but not the former. Both types of instabilily-could be eliminated by introduction of high slot and duct losses into the system or by ingesting a flow quantity into the system sufficient to remove almost the entire boundary layer ahead of all slots. It should be pointed out that a model setup. simulating an airfoil boundary layer control system would not exhibit either of the instabilities. This was thought to IXo possible due to a plenum volum scale effect and/or to the relatively higher losses caused by the modelzscale effect.