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Measurement of the Differential and Total Thrust and Torque of Six Full-Scale Adjustable-Pitch Propellers

Description: "Force measurements giving total thrust and torque, and propeller slip stream surveys giving differential thrust and torque were simultaneously made on each of six full-scale propellers in the 20-foot propeller-research tunnel of the National Advisory Committee for Aeronautics. They were adjustable-pitch metal propellers 9.5 feet in diameter; three had modified Clark Y blade sections and three had modified RAF-6 blade sections. This report gives the differential thrust and torque and the variat… more
Date: April 15, 1932
Creator: Stickle, George W.
Partner: UNT Libraries Government Documents Department
open access

Hydrogen as an auxiliary fuel in compression-ignition engines

Description: From Summary: "An investigation was made to determine whether a sufficient amount of hydrogen could be efficiently burned in a compression-ignition engine to compensate for the increase of lift of an airship due to the consumption of the fuel oil. The performance of a single-cylinder four-stroke-cycle compression-ignition engine operating on fuel oil alone was compared with its performance when various quantities of hydrogen were inducted with the inlet air. Engine-performance data, indicator c… more
Date: April 15, 1935
Creator: Gerrish, Harold C. & Foster, Hampton H.
Partner: UNT Libraries Government Documents Department
open access

Effects of Small Angles of Sweep and Moderate Amounts of Dihedral on Stalling and Lateral Characteristics of a Wing-Fuselage Combination Equipped With Partial- and Full-Span Double Slotted Flaps

Description: "Tests of a wing-fuselage combinations incorporating NACA 65-series airfoil sections were conducted in the NACA 19-foot pressure tunnel. The investigation included the tests with flaps neutral and with partial- and full-span double slotted flaps deflected to determine the effects of (1) variations of wing sweep between -4 degrees and 8 degrees on stalling and lateral stability and control characteristics and (2) variations of dihedral between 0 degree and 6.75 degrees on lateral stability chara… more
Date: April 15, 1944
Creator: Teplitz, Jerome
Partner: UNT Libraries Government Documents Department
open access

Langley full-scale-tunnel investigation of the factors affecting the static lateral-stability characteristics of a typical fighter-type airplane

Description: "The factors that affect the rate of change of rolling moment with yaw of a typical fighter-type airplane were investigated in the Langley full-scale tunnel on a typical fighter-type airplane. Eight representative flight conditions were investigated in detail. The separate effects of propeller operation, of the wing-fuselage combination, and of the vertical tail to the effective dihedral of the airplane in each condition were determined. The results of the tests showed that for the airplane wit… more
Date: April 15, 1947
Creator: Lange, Roy H.
Partner: UNT Libraries Government Documents Department
open access

The Acute Radiotoxicity of Injected Na²⁴ for Mice and Rats

Description: The following report describes the results from studies based on the toxicity and metabolism of radioactive substances derived from uranium fission. Rats and mice were administered radioactive sodium and reactions and changes were studied.
Date: April 15, 1948
Creator: Finkle, R. D.; Snyder, R. H.; Kisieleski, Walter E.; Teresi, J.; Broido, A. & Tompkins, P. C.
Partner: UNT Libraries Government Documents Department
open access

Radiochemistry 3

Description: Report discussing a general introduction to heavy element chemistry.
Date: April 15, 1948
Creator: Zebroski, E. L.
Partner: UNT Libraries Government Documents Department
open access

Analysis of the Effects of Various Mass, Aerodynamic, and Dimensional Parameters on the Dynamic Lateral Stability of the Douglas D-558-2 Airplane

Description: Report presenting an investigation of the effects of various mass, aerodynamic, and dimensional parameters on the dynamic lateral stability of the Douglas D-558-2 airplane. Results regarding an airplane with the flaps and gear retracted, airplane at sea level with flaps deflected 50 degrees and landing gear lowered, and effect of assumed modifications to airplane are provided.
Date: April 15, 1949
Creator: Queijo, M. J. & Michael, W. H., Jr.
Partner: UNT Libraries Government Documents Department
open access

Summary of the Availability and Performance Problems of High Octane Number Fuels

Description: Memorandum presenting a study to determine the possible blending agents or additives that may be used to supplement current high performance number, rich rating components in future aviation fuels. The study indicated that such high rich rating blending agents as toluene and xylene cannot be made available in sufficient quantities to maintain the rich rating performance of the fuels when reducing the lead content from 4.6 to 3.0 ml per gallon.
Date: April 15, 1949
Creator: NACA Committee on Aircraft Fuels
Partner: UNT Libraries Government Documents Department
open access

The Hydrolysis Products of Tributyl Phosphate and Their Effect on the Tributyl Phosphate Process for Uranium Recovery

Description: A study was made of the stability of tributyl phosphate (TBP) to acids, bases, and UO/sub 2/(NO/sub 3/su)/sub 2/ solutions, and of the chemistry of its decomposition products. The effect of such decomposition products on the extraction behavior of ion of MBP and lines the RAW analyzer and a subsequent reduction of feed flow rate in each case resulted in immediate reduction in losses, as evidenced by the polarographic results. In many such instances, several hours of operation at high waste loss… more
Date: April 15, 1951
Creator: Wagner, R. M.
Partner: UNT Libraries Government Documents Department
open access

Alternate Valve Studies

Description: No Description Available.
Date: April 15, 1952
Creator: McLean, H. J. & Wirta, R. W.
Partner: UNT Libraries Government Documents Department
open access

The Mechanism of Carrying Pu(III) on Lanthanum Fluoride

Description: From introduction: "Analytical procedures for the determination of plutonium samples from the extraction and concentration plants utilize the carrying of the hydroxylamine-reduced trivulent plutonium by coprecipitation on lanthanum fluoride. Most other plutonium procedures also take advantage of the efficient carrying on lanthanum fluoride."
Date: April 15, 1952
Creator: Ralphs, Delbert Lloyd
Partner: UNT Libraries Government Documents Department
open access

Removal of Radioisotopes by Sewage Treatment Processes: Progress Report No. 1, May 1, 1951 to March 31, 1952

Description: It is the purpose of this research project to ascertain the effectiveness of conventional biolog7ical and chemical treatment processes for the removal of radioisotopes from liquid wastes. A second objective is to investigate the basic mechanisms by which such removal proceeds.
Date: April 15, 1952
Creator: Kaufman, Warren J., 1922-; Klein, Gerhard, 1918-1987 & Gotaas, Harold Benedict, 1906-1977
Partner: UNT Libraries Government Documents Department
open access

The X-Ray Spectra of Polonium Atomic Number 84

Description: From abstract: "Two samples, each containing an estimated 10 curies (2 mg) of polonium-210, were purified by vacuum distillation and evaporated onto oblique sections of X-ray targets made of copper. Four lines of the K series and ten lines of the L series of the X-ray spectrum of polonium were recorded with a one-meter transmission crystal spectrograph and a 25-centimeter Bragg spectrograph, respectively. Measured wavelengths agree approximately with values predicted by extrapolation of Moseley… more
Date: April 15, 1952
Creator: Peed, W. F.; Burkhart, L. E.; Staniforth, R. A. & Fauble, L. G.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of etchants for deoxidizing aluminum components

Description: In the canning operation, the preparation of aluminum components is important in assuring uniform wetting of the aluminum surfaces with Al-Si. The surfaces of the components should be free of dirt and grease and should also have a minimum retention of non-metallic film, normally aluminum oxide, for the best wetting properties. At present, dirt and grease are removed satisfactorily by a vapor degreaser followed by a Duponol-alkaline wash. The standard specified method of removing the aluminum ox… more
Date: April 15, 1953
Creator: Weakly, E. A.
Partner: UNT Libraries Government Documents Department
open access

On the Stability of Fluid Flows with Spherical Symmetry

Description: This study will reconsider the problem of a spherical interface between two fluids of different densities. The question of present concern is the stability of the spherical interface.
Date: April 15, 1953
Creator: Plesset, M. S.
Partner: UNT Libraries Government Documents Department
open access

Quadrupole Focusing Lenses for Charged Particles

Description: A set of four strong focusing magnetic quadrupole lenses has been constructed and operated. Each lens consists of four air cooled electromagnets with pole tips having a hyperbolic cross section. Each lens is 4 in. long and has an aperture 2 in. in diameter. Measurements of the magnetic field demonstrate that the hyperbolic cross section satisfies the requirements of a constant magnetic field gradient very well. The technique of deflecting a current carrying flexible wire has been used to measur… more
Date: April 15, 1953
Creator: Cork, Bruce & Zajec, Emery
Partner: UNT Libraries Government Documents Department
open access

The Spontaneous Fission of Plutonium-240

Description: The spontaneous fission rate of plutonium-240 has been redetermined and found to be 1.51 X 106 events/g/hr.
Date: April 15, 1953
Creator: Kinderman, E. M.
Partner: UNT Libraries Government Documents Department
open access

Transonic Flow Past Cone Cylinders

Description: "Experimental results are presented for transonic flow post cone-cylinder, axially symmetric bodies. The drag coefficient and surface Mach number are studied as the free-stream Mach number is varied and, wherever possible, the experimental results are compared with theoretical predictions. Interferometric results for several typical flow configurations are shown and an example of shock-free supersonic-to-subsonic compression is experimentally demonstrated" (p. 963).
Date: April 15, 1953
Creator: Solomon, George E.
Partner: UNT Libraries Government Documents Department
open access

Los Alamos Coding System and Assembly Program for the IBM 701

Description: The process of coding, coding assembly, and check-out of the assembled code is the most demanding upon the coder's attention and his time. Therefore, it is necessary to furnish the coder with a simple but highly versatile coding system and assembly program, an a variety of utility programs to aid him in the detection and correction of coding errors.
Date: April 15, 1954
Creator: Sweeney, Dura W.
Partner: UNT Libraries Government Documents Department
open access

Comparison of experimental with calculated results for the lifting effectiveness of a flexible 45 degree sweptback wing of aspect ratio 6.0 at Mach numbers from 0.8 to 1.3

Description: Report presenting tests conducted on models with 45 degree sweptback wings with varying degrees of flexibility to determine the effective lift-curve slopes in order to evaluate the usefulness of a general method for predicting effective lift ratio by a comparison of predicted values with test results.
Date: April 15, 1954
Creator: Walters, Richard E.
Partner: UNT Libraries Government Documents Department
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