Report presenting an investigation in an altitude chamber to determine the power extraction and braking characteristics of a windmilling single-spool axial-flow turbojet engine of the 5000-pound thrust class over a range of altitudes and Mach numbers. Results regarding extractable horsepower from a windmilling engine, total pressure gradient through a windmilling engine, contribution of a compressor to extracted horsepower, and braking of the windmilling engine are provided.

Report presenting pressure distributions measured along prolate spheroids of fineness ratios 3 to 20 and along a slender body of fineness ratio 12 are compared at subsonic and transonic speeds and several angles of attack. The experimental results, prediction of incompressible pressure distribution along the 0 degree and 180 degree meridians, prediction of subsonic pressure distribution along the meridians, prediction of subsonic pressure distributions around prolate spheroids, effect of fineness ratio and angle of attack on separation, and prediction of transonic pressure distribution.

From Introduction: "The supersonic axial-flow compressor, for example, appears to offer advantages of high stage pressure ratio and height weight flows (reference 1) but problems peculiar to this compressor type have accompanied its introduction. For high single-stage pressure ratios (>4) the problem of converting the high dynamic energy to useful pressure arises (reference 2). In addition, the high tip speeds and weight flows combine to create a difficult situation for the turbine designer."

Report presenting effects of wing trailing-edge bluntness on aerodynamic characteristics of a wing-body combination at a range of Mach numbers and Reynolds numbers. Modifications were made to the rear half of a basic plane tapered wing of aspect ratio 3.1 and a 3-percent-thick, circular-arc, biconvex section with three types of trailing-edge shapes. Results regarding the lift characteristics, pitching-moment characteristics, drag characteristics, and maximum lift-drag ratio are provided.

Report presenting an experimental investigation to determine the performance of twin-scoop side inlets located on the fuselage of a proposed aircraft in a region of large boundary-layer thickness. Inlet configurations with subsonic and supersonic cowlings which utilized two-dimensional compression ramps and ram-type scoops for boundary-layer-removal systems were investigated at several Mach number ranges. Results regarding supersonic Mach number range, angle of attack, subsonic Mach number, and static conditions are provided.

Report presenting an investigation to determine the characteristics of a double-shroud cooling-air ejector. The performance of a single-shroud ejector with a clamshell-type variable-area actuating nozzle was compared with that of an ejector having a conical nozzle. Results regarding the mechanics of ejector flow systems, effect of variable-area primary nozzle on ejector performance, double-shroud-ejector performance, and application of data are provided.

Under conditions resulting from surface and underground detonations of atomic bombs, tests were conducted on Chemical Corps impregnated and unimpregnated protective clothing, Individual Protective Mask M9A1 with M11 Canister, Tank Collective Protector E26 and E22, and Protective Ointment M5. Both impregnated and unimpregnated clothing were capable of preventing contact between the skin and radioactive dusts. Unimpregnated clothing demonstrated better contanmination-decontamination characteristics, but the secondary radiation from all clothing was negligible. The protective cover was effective in preventing contamination of clothing. The M9A1 mask with M11 canister furnished complete protection against inhalation of radioactive dust. The flltering efficiencies of the E26 tank collective protectors were found to be very high, and no deficiencies were found in the unit. The filtering efficiencies of the E22 tank collective protectors were also high. Panels coated with M5 ointment were found to be much more highly contaminated than bare panels. (auth)

From introduction: This report details the reconnaissance for uraniferous lignites in North Dakota, South Dakota, Montana, and Wyoming during 1948 and 1949.

From abstract: The Legin group area comprises five privately owned claims, nine Government claims, and some public land. The area is in parts of secs. 28 and 29, T. 43 N., R. 19 W., New Mexico principal meridian, San Miguel County, Colo. It is about 45 miles from the Government mill at Monticello, Utah, and 50 miles from the Vanadium Corporation of America mill at Naturita, Colo. The Legin group area has yielded a total production of more than 18,000 short tons of carnotite ore that averaged 0.32 percent U30 and 2.5 percent V 205 . Most of this production was accomplished during the years from 1935 to 1944, and from 1949 to October 1951.

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From introduction: The objective of the investigations is to test the usefulness of these geophysical procedures in connection with exploration for uranium-bearing mineral deposits.

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Abstract: Dark shale and arkosic sandstone south of Guadalupita, Mora County, New Mexico, contain as much as 4 percent copper and 0. 01 percent uranium on the basis of a few samples recently analyzed. The deposits occur primarily in the dark shale which is about 5 feet thick and dips about 900. Potential reserves of this material are very large. Prospecting and further geologic work will be necessary, however, to evaluate possibilities of these large tonnages. If the deposits can be mined for their copper content, the uranium might be recovered as a byproduct. Detailed mapping and possibly some trenching will be undertaken by the Geological Survey in order further to evaluate the deposits.

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Abstract: "The mineral bayleyite was first described in 1951 from a mine in Yavapai County, Ariz. This report describes bayleyite from the Hideout No. 1 mine, San Juan County, Utah, together with its associated minerals and mineralogic properties."

The following report covers a reconnaissance for new discoveries of radioactive lignite deposits in the Green River Basin and Uinta Basin of Wyoming and Utah where similar discoveries to previous studies in North Dakota, South Dakota, Montana, and Wyoming were made. Additionally, there were new prospects examined, as well as reconnaissance for uranium deposits.

Report discussing a geological study performed to find uraniferous lignites in North Dakota, Eastern Montana, north-central Wyoming, and northwestern South Dakota. "Deposits of uraniferous lignites were discovered at Blue Buttes, eastern Montana; and at North Cave Hills, South Cave Hills, and at Slim Buttes in northwestern South Dakota."

Report discussing the reconnaissance for radioactive uraniferous rocks in parts of Colorado, Wyoming, and Utah. Regional geology of each area, results of regional reconnaissance, and miscellaneous prospects are included.

Report discussing facts that support the shallow water theory of the origin of the Chattanooga black shale.

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Introduction: This preliminary report is an attempt to correlate all of the available information having a bearing on the geology of the uraniferous deposits and to set forth such theories and recommendations as may be deduced at this stage.

Abstract: The data obtained from the radioassay of fish collected in vicinity of the Hanford Works between April, 1948 and June, 1950 are presented. Most of the radioactivity in the fish resulted from the concentration of p32 in the scales, bone, and certain visceral organs. The level of activity density in the fish was influenced by size, feeding habits and metabolic rate in addition to the activity density of the water. Changes in operation of nuclear reactors have resulted in progressive increases in activity densities of fish from one year to the next. The levels of radioactivity are not sufficiently high to be hazardous to either the fish or persons eating them.