Resource Type
Serial/Series Title
Atomic Energy Commission Reports
311
NACA Research Memorandums
115
AEC research and development report
89
Hanford Works Reports
71
HW (Series)
58
NACA Technical Reports
46
North American Aviation Reports
45
Health and Safety Laboratory Reports
42
General Electric Company Atomic Power Reports
41
TID
41
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A New Form of Standard Resistance
Report issued by the Bureau of Standards over new developments of electrical resistivity in manganin wire coils. The results of the developments are discussed. This report includes tables, illustrations, and photographs.
Date:
October 1, 1908
Creator:
Rosa, Edward B.
Object Type:
Report
System:
The UNT Digital Library
Damping Coefficients Due to Tail Surfaces in Aircraft
"The object of the investigation described in this report was to compare the damping coefficients of an airfoil as calculated from a knowledge of the static characteristics of the section with those obtained experimentally with an oscillation. The damping coefficients as obtained, according to the conventional notation, can be considered either as due to pitching or as due to yawing, the oscillation in these experiments being so arranged that the surfaces oscillate about a vertical axis. This is in reality the case when the influence is yawing about the standard Z-axis, but it can also be considered as a pitching motion when the model is so rigged that its standard Y-axis becomes vertical" (p. 118).
Date:
January 1, 1923
Creator:
Chu, Lynn
Object Type:
Report
System:
The UNT Digital Library
Mollier Chart of Properties of Ammonia, 1923
Mollier chart of properties of ammonia.
Date:
May 1, 1923
Creator:
United States. Bureau of Standards.
Object Type:
Report
System:
The UNT Digital Library
Use of Sulphite Cellulose Extract as a Tanning Material
Report issued by the Bureau of Standards over chemicals used for tanning leather hides. As stated in the introduction: "an investigation was conducted to determine the suitability of sulfite cellulose extracts, derived from the waste liquors discharged from paper pulp mills, for use in tanning hides for the manufacture of leather" (p. 309). This report includes tables, and photographs.
Date:
November 1, 1926
Creator:
Wallace, E. L. & Bowker, Roy Clement
Object Type:
Report
System:
The UNT Digital Library
Aircraft Woods: Their Properties, Selection, and Characteristics
From Summary: "This report presents, further, information on the properties of various other native species of wood compared with spruce, and discusses the characteristics of a considerable number of them from the standpoint of their possible application in aircraft manufacture to supplement the woods that are now most commonly used."
Date:
January 1, 1930
Creator:
Markwardt, L. J.
Object Type:
Report
System:
The UNT Digital Library
A Method of Calculating the Ultimate Strength of Continuous Beams
The purpose of this study was to investigate the strength of continuous beams after the elastic limit has been passed. As a result, a method of calculation, which is applicable to maximum load conditions, has been developed. The method is simpler than the methods now in use and it applies properly to conditions where the present methods fail to apply.
Date:
February 1, 1930
Creator:
Newlin, J. A. & Trayer, George W.
Object Type:
Report
System:
The UNT Digital Library
Pressure distribution over the fuselage of a PW-9 pursuit airplane in flight
"This report presents the results obtained from pressure distribution tests on the fuselage of a PW-9 pursuit airplane in a number of conditions of flight. The investigation was made to determine the contribution of the fuselage to the total lift in conditions considered critical for the wing structure, and also to determine whether the fuselage loads acting simultaneously with the maximum tail loads were of such a character as to be of concern with respect to the structural design of other parts of the airplane. The results show that the contribution of the fuselage toward the total lift is small on this airplane" (p. 327).
Date:
August 1, 1930
Creator:
Rhode, Richard V. & Lundquist, Eugene E.
Object Type:
Report
System:
The UNT Digital Library
Flame Movement and Pressure Development in an Engine Cylinder
"This investigation describes a visual method for making stroboscopic observations, through a large number of small windows, of the spread of flame throughout the combustion chamber of a gasoline engine. Data, secured by this method on a small engine burning gaseous fuels, are given to show the effects of mixture ratio, spark advance, engine speed, charge density, degree of dilution, compression ratio, and fuel composition on flame movement in the cylinder. Partial indicator diagrams showing pressure development during the combustion period are included" (p. 697).
Date:
May 1, 1931
Creator:
Marvin, Charles F., Jr. & Best, Robert D.
Object Type:
Report
System:
The UNT Digital Library
Air flow in a separating laminar boundary layer
Report discussing the speed distribution in a laminar boundary layer on the surface of an elliptic cylinder, of major and minor axes 11.78 and 3.98 inches, respectively, has been determined by means of a hot-wire anemometer. The direction of the impinging air stream was parallel to the major axis. Special attention was given to the region of separation and to the exact location of the point of separation. An approximate method, developed by K. Pohlhausen for computing the speed distribution, the thickness of the layer, and the point of separation, is described in detail; and speed-distribution curves calculated by this method are presented for comparison with experiment.
Date:
December 1, 1934
Creator:
Schubauer, G. B.
Object Type:
Report
System:
The UNT Digital Library
Characteristics of the NACA 23012 airfoil from tests in the full-scale and variable-density tunnels
"This report gives the results of tests in the NACA full-scale and variable-density tunnels of a new wing section, the NACA 23012, which is one of the more promising of an extended series of related airfoils recently developed. The tests were made at several values of the Reynolds number between 1,000,000 and 8,000,000. The new airfoil develops a reasonably high maximum lift and a low profile drag, which results in an unusually high value of the speed-range index. In addition, the pitching-moment coefficient is very small" (p. 435).
Date:
March 1, 1935
Creator:
Jacobs, Eastman N. & Clay, William C.
Object Type:
Report
System:
The UNT Digital Library
General Airplane Performance
"Equations have been developed for the analysis of the performance of the ideal airplane, leading to an approximate physical interpretation of the performance problem. The basic sea-level airplane parameters have been generalized to altitude parameters and a new parameter has been introduced and physically interpreted. The performance analysis for actual airplanes has been obtained in terms of the equivalent ideal airplane in order that the charts developed for use in practical calculations will for the most part apply to any type of engine-propeller combination and system of control, the only additional material required consisting of the actual engine and propeller curves for propulsion unit" (p. 241).
Date:
June 1, 1937
Creator:
Rockfeller, W. C.
Object Type:
Report
System:
The UNT Digital Library
Model Study of Channel Improvement and Stabilization in the Pryors Island Reach of the Ohio River
This technical memorandum constitutes a complete report on a model study of the Pryors Island reach of the Ohio River, made for the purpose of determining the most effective plan of regulating works for the further improvement and stabilization of the navigable channel.
Date:
September 1, 1938
Creator:
Waterways Experiment Station (U.S.)
Object Type:
Report
System:
The UNT Digital Library
Chain Reaction of Pure Fissionable Materials in Solution
The critical mass of 94-239 and the corresponding critical dimensions of homogeneous mixtures of 94-239 with various moderating media been calculated as a function of the concentration of 94. A simple transformation makes the figures applicated to92-235. the results are in essential agreement with the preliminary estimated made independently by Oppenheimer and Serber. The problem of the stability of a chain reaction in solution and questions of protection are discussed.
Date:
January 1, 1943
Creator:
Christy, Robert F., 1916-2012 & Wheeler, John Archibald, 1911-2008
Object Type:
Report
System:
The UNT Digital Library
Radioactivity of the Cooling Water
The most important source of radioactivity at the exit manifold of the pile will be due to O19, formed by neutron absorption of O18. A recent measurement of Fermi and Weil permits to estimate that it will be safe to stay about 80 minutes daily close to the exit manifolds without any shield. Estimates are given for the radioactivities from other sources -- both in the neighborhood and farther away from the pile.
Date:
March 1, 1943
Creator:
Wigner, Eugene Paul, 1902-1995.
Object Type:
Report
System:
The UNT Digital Library
Analysis of wind-tunnel stability and control tests in terms of flying qualities of full-scale airplanes
From Introduction: "The purpose of this paper is to outline a suggested form of presentation of the results of a stability and control investigation in terms of flying qualities as defined in reference 1 and to systematize and review briefly the analytical work required for this type of presentation. No effort is made to specify definite test procedures."
Date:
April 1, 1943
Creator:
Kayten, Gerald G.
Object Type:
Report
System:
The UNT Digital Library
The Contamination of Cooling Water by a P-9 Plant
The following sources of contamination in cooling water of the P-9 plant are considered: (1) Fission recoils, (2) Corrosion of metal, (3) Recoil from aluminum, (4) Induced activity in the water. It is found that for a P-9 plant of 3.5 x 10(4) KW contamination of the river at "X" should not exceed the .1 r criterion unless coating failure occurs. Tables of the amount of coating failure permissible are given as a function of holdup time.
Date:
June 1, 1943
Creator:
Friedman, Francis L. (Francis Lee), 1918-
Object Type:
Report
System:
The UNT Digital Library
A Method of Estimating the Knock Rating of Hydrocarbon Fuel Blends
Report presenting two blending equations that have been derived from an analysis based on certain assumptions relative to the cause of fuel knock. The main purpose of this study was to investigate the possibility of developing a method of predicting the knock ratings of fuel blends.
Date:
August 1, 1943
Creator:
Sanders, Newell D.
Object Type:
Report
System:
The UNT Digital Library
A Method of Estimating the Knock Rating of Hydrocarbon Fuel Blends
"The usefulness of the knock ratings of pure hydrocarbon compounds would be increased if some reliable method of calculating the knock ratings of fuel blends was known. The purpose of this study was to investigate the possibility of developing a method of predicting the knock ratings of fuel blends. Two blending equations have been derived from an analysis based on certain assumptions relative to the cause of fuel knock" (p. 1).
Date:
August 1, 1943
Creator:
Sanders, Newell D.
Object Type:
Report
System:
The UNT Digital Library
The Measurement of Fuel-Air Ratio by Analysis of the Oxidized Exhaust Gas
"An investigation was made to determine a method of measuring fuel-air ratio that could be used for test purposes in flight and for checking conventional equipment in the laboratory. Two single-cylinder test engines equipped with typical commercial engine cylinders were used. The fuel-air ratio of the mixture delivered to the engines was determined by direct measurement of the quantity of air and of fuel supplied and also by analysis of the oxidized exhaust gas and of the normal exhaust gas" (p. 73).
Date:
October 1, 1943
Creator:
Gerrish, Harold C. & Meem, J. Lawrence, Jr.
Object Type:
Report
System:
The UNT Digital Library
Comparative Tests of the Strength and Tightness of Commercial Flush Rivets of One Type and NACA Flush Rivets in Machine-Countersunk and Counterpunched Joints
Report discusses an investigation that was conducted to compare the strength and tightness of machine-countersunk flush-riveted joints assembled with NACA flush rivets and a type of commercial flush rivet. A comparison was also generated between the strength and tightness of counterpunched flush-riveted joints assembled with the same types of rivet. NACA's flush-riveted joints tended to be stronger and tighter than the commercial joints.
Date:
February 1, 1944
Creator:
Mandel, Merven W.
Object Type:
Report
System:
The UNT Digital Library
Knock-limited performance of several internal coolants
The effect of internal cooling on the knock-limited performance of an-f-28 fuel was investigated in a CFR engine, and the following internal coolants were used: (1) water, (2), methyl alcohol-water mixture, (3) ammonia-methyl alcohol-water mixture, (4) monomethylamine-water mixture, (5) dimethylamine-water mixture, and (6) trimethylamine-water mixture. Tests were run at inlet-air temperatures of 150 degrees and 250 degrees F. to indicate the temperature sensitivity of the internal-coolant solutions.
Date:
February 1, 1944
Creator:
Bellman, Donald R. & Evvard, John C.
Object Type:
Report
System:
The UNT Digital Library
Radiometric Analysis of Thick Samples
Introduction: Measurements of polonium content in solids are usually performed by dissolving the material and preparing a thin sample which can be measured with one of the available instruments. A measurement of the radiation emerging from the thick sample should be sufficient to evaluate the polonium content. For this reason a calculation has been performed and the results have been compared with those obtained by the thin sample method. Obviously this proposed method using thick samples would be faster.
Date:
March 1, 1944
Creator:
DeBenedetti, Sergio
Object Type:
Report
System:
The UNT Digital Library
Nitrited-Steel Piston Rings for Engines of High Specific Power
"Several designs of nitrided-steel piston rings were performance-tested under variable conditions of output. The necessity of good surface finish and conformity of the ring to the bore was indicated in the preliminary tests. Nitrided-steel rings of the same dimensions as cast-iron rings operating on the original piston were unsatisfactory, and the final design was a lighter, rectangular, thin-face-width ring used on a piston having a maximum cross-head area and a revised skirt shape. Results were obtained from single-cylinder and multicylinder engine runs" (p. 1).
Date:
April 1, 1944
Creator:
Collins, John H., Jr.; Bisson, Edmond E. & Schmiedlin, Ralph F.
Object Type:
Report
System:
The UNT Digital Library
An experimental investigation of rectangular exhaust-gas ejectors applicable for engine cooling
"An experimental investigation of rectangular exhaust-gas ejector pumps was conducted to provide data that would serve as a guide to the design of ejector applications for aircraft engines with marginal cooling. The pumping characteristics of rectangular ejectors actuated by the exhaust of a single-cylinder aircraft engine were determined for a range of ejector mixing-section area from 20 to 50 square inches, over-all length from 12 to 42 inches, aspect ratio from 1 to 5, diffusing exit area from 20 to 81 square inches, and exhaust-nozzle aspect ratio from 1 to 42" (p. 161).
Date:
May 1, 1944
Creator:
Manganiello, Eugene J. & Bogatsky, Donald
Object Type:
Report
System:
The UNT Digital Library