"This report gives the results of a detailed study of the flutter characteristics of four representative aircraft wings. This study was made using the electric-analog computer at the California Institute of Technology. During the course of this investigation eight important parameters of each wing were varied and, in addition, the effects of mass, inertia, pitching spring, and location of a concentrated mass were investigated for all four wings and at several sweepback angles" (p. 1385).

This examination was conducted primarily to determine the extent of corrosion existing between the silver bearing alloy and the type 416 stainless steel nut of K reactor units subjected to service conditions and also to establish irrevocably that metallurgical defects exist in the brazes.

Nuclear safety is recognized as being of prime importance in the conduct of manufacturing operations here at HAPO. Responsibility for this safety is shared by the Engineering and Manufacturing Departments, with the former defining the hazards and the required precautionary limits, and the latter translating these specifications into effective operational controls and practices. The Manufacturing Department has just completed a thorough review of its position with respect to nuclear hazards control, and the results of this analysis are presented herewith. All three of the plant Sections are involved and have been included in this review. However, the hazard potential and control requirements are clearly the greatest in the Reactor Section where operations are approaching closer and closer to rather uncertain absolute ceilings for safe operation, as the power levels and output of the comparatively fixed facilities are pushed higher and higher. Accordingly, the situation there has been given primary emphasis in the review and in this report.

Report discussing testing to determine the longitudinal and lateral stability and control characteristics of a Chance Vought Regulus II missile at several Mach and Reynolds numbers.

Report presenting an investigation in the 4- by 4-foot supersonic pressure tunnel to determine the static longitudinal and lateral stability and control characteristics of an 0.065-scale model of the Chance Vought Regulus II missile. The tests were made at three Mach and Reynolds numbers.

A survey was made of levels of strontium-89 and strontium-90 from fallout in samples of soil, vegetation, and animal bone collected from selected pasture sites in North Carolina, New York, Georgia, Utah, and New Jersey during 1953 and 1954. The bone levels showed an average increase by a factor of 2.4. Data are presented graphically showing the relationship of the calcium content in the soil to strontium-90 uptake in animal bones. The ratio of strontium-90 to strontium-89 in the uptake cycle at each site was determined. The fallout at each site during the animal grazing period and the vegetation growth period was collected on gummed paper exposed for weekly intervals at each site. Data are tabulated. The vegetation collected at the end of the growth period showed a strontium-90 to strontium-89 ratio similar to the fallout material for the period. This was considered evidence of leaf retention.