Report presenting testing of a 60-degree delta-wing-fuselage model with a 4-percent-thick airfoil section with large leading-edge radius in the 19-foot pressure tunnel to determine the effectiveness of porous-leading-edge suction in delaying and reducing the leading-edge separation and accompanying high drag. Results regarding the delta wing, including pump power, lift, pitching moment, pressure distributions, the clipped wing, and some comments on the application of leading-edge suction to delta wings are provided.

Report presenting results from flight tests at transonic speeds for a canard and a conventional-tail rocket-powered model in continuous rough air. The use of an airspeed-fluctuation instrument for measuring the turbulence intensity experienced is described as well as the resulting improvement in the technique of testing rocket models in rough air. The short-period frequency was dominant in the center-of-gravity normal-acceleration response for both models.

Report presenting a rough-water landing investigation of a model of a hydro-ski seaplane design to determine the effect on the landing motions and vertical accelerations of mounting the hydro-ski on shock-absorber struts. The tests occurred at one landing trim and wave height over a range of wave length for three hydro-ski configurations. Results regarding the landings, effect of artificial stabilization, damping in trim, and reductions in vertical accelerations are provided.

Report presenting hydrodynamic force characteristic for three streamline bodies of revolution equipped with chine strips and with fineness ratios of 6, 9, and 12. Testing was also performed on the bodies with the chine strips removed and with the tail cones removed. Hydrodynamic resistance, pitching moment, wetted length, and height of the model above the water surface for a range of trim, load, and speed are provided.

Equations are developed for the computation of MPC's for radioisotopes assuming the excretion or retention to follow a power law rather than an exponential law. Computations are made for four isotopes on which some human data are available. Uncertainties in the initial data due to the use of intravenous injection to obtain the primary data, the definition of retention and the effects of age and diet are discussed.

As potentially suitable alternate methods of installing closure plugs in cored slugs, four different schemes were considered. One of these schemes, whereby a flat chamfered uranium disc is crimped into a counterbored recess at each end of the bare slug after pickling, was developed to a workable state, and partially evaluated prior to reassignment of the job to another group. From the results of initial evaluation tests, this process appears to provide leak-free core closures and offers economic benefits that make it attractive as a production method, should cored slugs be adopted as standard.

Ten materials in which gold was alloyed with copper, silver, graphite, platinum, nickel or zinc (compositions given in Table 1) were evaluated in this study. Corrosion tests to determine the resistance of the alloys to boiling 60 to 65% nitric acid showed that with the exception of an alloy containing 51 wt % gold and 49 wt % graphite (Gold Graphalloy 811) which dissolved in 48 hr and an alloy containing 90 wt % gold and 10 wt % graphite which lost 2.3 wt % in 240 hr the alloys were essentially corrosion resistant.