Report presenting an investigation of several fuels in a 16-inch ramjet engine during a free-jet investigation of ramjet performance in a wind tunnel. The fuels used were gasoline, kerosene, blend of 50-percent gasoline and 50-percent propylene oxide, blend of 75-percent kerosene and 25-percent propylene oxide, and isopentane. Results regarding ranges of operation, combustion efficiencies, and weight and volume specific fuel consumptions obtained with various fuels.

Report presenting the results of an investigation to determine the drag, static stability, control effectiveness, boundary-layer conditions, and first-order effects of propeller operation on a scale model of a proposed high-submerged-speed submarine with various bridge-fairwater and tail configurations.

From Summary: "An investigation of two 1/14 scale model configurations of an outboard nacelle for the XB-36 airplane was made in the Langley two-dimensional low-turbulence tunnels over a range of airplane lift coefficients (C (sub L) = 0.409 to C(sub L) = 0.943) for three representative flow conditions. The purpose of the investigation was to develop a low-drag wing-nacelle pusher combination which incorporated an internal air-flow system. The present investigation has led to the development of a nacelle which had external drag coefficients of similar order of magnitude to those obtained previously from tests of an inboard nacelle configuration at the corresponding operating lift coefficients and from approximately one-third to one-half of those of conventional tractor designs having the same ratio of wing thickness to nacelle diameter."

Report presenting the total-pressure recovery characteristics of three circular internal-compression inlets with translating centerbodies at a range of free-stream Mach numbers. The inlets differed only in the shape of the internal compression contours. Results regarding the maximum pressure recoveries and pressure-recovery characteristics are provided.

Report presenting an investigation at high subsonic speeds to determine the static stability characteristics of a cambered-delta-wing model with wing dihedral angles of 20 degrees and 50 degrees. Results regarding the longitudinal characteristics and lateral characteristics are provided.

An investigation was made in the N.A.C.A. 7- by 10-foot wind tunnel to determine the aerodynamic section characteristics of an N.A.C.A. 23012 airfoil with a single main slotted flap equipped successively with auxiliary flaps of the plain, split, and slotted types. A test installation was used in which an airfoil of 7-foot span was mounted vertically between the upper and the lower sides of the closed test section so that two-dimensional flow was approximated" (p. 699).

Report presenting an investigation to obtain information about the basic aerodynamic characteristics of two vertical-take-off-and-landing jet bomber airplanes, one with a high wing and one with a low wing. Results regarding pitch and sideslip are provided. The high-tail configurations were found to have higher lift-drag ratios for both high- and low-wing models.

Memorandum presenting an investigation to determine the effects of increase in angle of dead rise on the overall hydrodynamic characteristics of a seaplane having a length-beam ratio of 15 and a wing loading of 120 pounds per square foot. In general, increasing the angle of dead rise from 20 to 40 degrees and 60 degrees improved the trim limits of stability and the range of center-of-gravity positions for satisfactory take-off characteristics.

Report presenting an investigation of the combined effects of wing taper ratio and low horizontal-tail position on the static longitudinal stability of a 45 degree sweptback wing-body combination with an aspect ratio of 4 at a range of Mach numbers. Results regarding tail-off pitch characteristics, tail-on pitch characteristics, and effective flow characteristics over horizontal tail are provided.

Report documenting research and developments made by the Health Physics Division of the Oak Ridge National Laboratory.

Results of 1900 biological expedition to document the Hudson Bay. Examination of species of plants and animals.

From abstract: Report of commercial buildings exposed to a nuclear device detonation.

From summary: The design of a spectrometer with the requisite improvement in crystals facilitates X-ray tube fluorescence.

Report covering progress regarding a study on radiation synthesis involving halogenated compounds. Experimental progress, results and discussion are included.

Introduction: "During the early planning of the multicurie cells at Hanford it was decided that a slave type manipulator would be necessary to perform the experiments for which the cells were being designed. The design required steel roofs for installation through a port hole in the face. Technical Services Equipment Development began developing the proposed manipulator in January 1951 by making a study of those existing at that tune. None met the requirements which had been established; therefore, the design of a special manipulator was started immediately."

"The pulsed source technique consists of introducing repeated short bursts of neutrons into a subcritical assembly, and following the decay of the leakage flux as a function of time...It is noted that plotting the decay constant as a function of buckling gives an apparently accurate way to extrapolate to prompt critical. The pulsed source technique can also be used to calibrate control rod and poison worth, and will give some estimate of the prompt neutron lifetime."

The following report presents neutron-flux measurements with the Mark I element, which include neutron-flux distribution and flux depression within the element.

From abstract: "A detailed study is presented of some fundamental problems connected with the realization of a nuclear gaseous reactor rocket engine."

Abstract: "A magnetically operated pump has been constructed and used successfully to pump a mixture of uranium hexafluoride and hydrogen fluoride gases at pressures up to 175 psia. and temperatures up to 100 C."

Results of a questionnaire survey are presented on reactor supervisor and operator education, experience, and training, and on certification procedures by reactor category. The questionnaires were obtained from 362 supervisors, 393 operators, 44 supervisor trainees, and 139 operator trainees.

Results of the Chinati Mountains project area of the detailed geochemical survey fro Trans-Pecos, Texas are reported.

Results of the Dryden project area of the detailed geochemical survey for Trans-Pecos, Texas are reported.

Results of the Stillwell Mountains project area of the detailed geochemical survey for Trans-Pecos, Texas are reported.

Report documenting the suitability of Alaska for plant locations to produce synthetic liquid fuels, based on raw materials such as coal and natural gas.