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Report on Acreage in Callahan and Taylor Counties
Report prepared by Warren Worley, a geologist, concerning the topography, drainage, geology, and structural features of land purchased by K.K. and K.B. Legett.
Date:
October 2, 1919
Creator:
Worley, Warren
System:
The Portal to Texas History
Report on Acreage in Callahan and Taylor Counties
Report prepared by Warren Worley, a geologist, concerning the topography, drainage, geology, and structural features of land purchased by K.K. and K.B. Legett.
Date:
October 2, 1919
Creator:
Worley, Warren
System:
The Portal to Texas History
Report on Acreage in Callahan and Taylor Counties, continued.
Final page of a report prepared by Warren S. Worley concerning development of oil wells on the land of K.K. Legett and K.B. Legett.
Date:
October 2, 1919
Creator:
Worley, Warren S.
System:
The Portal to Texas History
Report on acreage in Callahan and Taylor Counties continued.
Final page of a report on acreage in Callahan and Taylor Counties in Texas, including information about oil sands, wagon roads, and fuel supplies. The report was submitted by a geologist to K.K. Legett and K.B. Legett.
Date:
October 2, 1919
Creator:
unknown
System:
The Portal to Texas History
Annual Report of the Boy Scouts of America: 1923
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1923, activities, finance, foreign relations, organizational leadership, and other information about scouting programs.
Date:
May 2, 1924
Creator:
Boy Scouts of America
System:
The Portal to Texas History
Combustion Time in the Engine Cylinder and Its Effect on Engine Performance
"As part of a general program to study combustion in the engine cylinder and to correlate the phenomena of combustion with the observed performance of actual engines, this paper presents a sketchy outline of what may happen in the engine cylinder during the burning of a charge. It also suggests the type of information needed to supply the details of the picture and points out how combustion time and rate affect the performance of the engine. A theoretical concept of a flame front which is assumed to advance radially from the point of ignition is presented, and calculations based on the area and velocity of this flame and the density of the unburned gases are made to determine the mass rate of combustion" (p. 393).
Date:
April 2, 1927
Creator:
Marvin, Charles F., Jr.
System:
The UNT Digital Library
The effect of cowling on cylinder temperatures and performance of a Wright J-5 engine
This report presents the results of tests conducted to determine the effect of different amounts and kinds of cowling on the performance and cylinder temperatures of a standard Wright J-5 engine. These tests were conducted in conjunction with drag and propeller tests in which the same cowlings were used. Four different cowlings were investigated varying from the one extreme of no cowling on the engine to the other extreme of the engine completely cowled and the cooling air flowing inside the cowling through an opening in the nose and out through an annular opening at the rear of the engine. Each cowling was tested at air speeds of approximately 60, 80, and 100 miles per hour.
Date:
May 2, 1929
Creator:
Schey, Oscar W. & Biermann, Arnold E.
System:
The UNT Digital Library
Pressure distribution over a symmetrical airfoil section with trailing edge flap
"Measurements were made to determine the distribution of pressure over one section of an R. A. F. 30 (symmetrical) airfoil with trailing edge flaps. In order to study the effect of scale measurements were made with air densities of approximately 1 and 20 atmospheres. Isometric diagrams of pressure distribution are given to show the effect of change in incidence, flap displacement, and scale upon the distribution. Plots of normal force coefficient versus angle of attack for different flap displacements are given to show the effect of a displaced flap" (p. 589).
Date:
April 2, 1930
Creator:
Jacobs, Eastman N. & Pinkerton, Robert M.
System:
The UNT Digital Library
Daily hospital report for Concho, Oklahoma
Daily hospital report listing the number of patients admitted, discharged, and dangerously ill. This report includes the birth of a baby and lists a pregnant patient.
Date:
January 2, 1931
Creator:
unknown
System:
The Gateway to Oklahoma History
Annual Report of the Boy Scouts of America: 1930
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1930, activities, finance, public relations, organizational leadership, and other information about scouting programs.
Date:
March 2, 1931
Creator:
Boy Scouts of America
System:
The Portal to Texas History
The drag characteristics of several airships determined by deceleration tests
This report presents the results of deceleration tests conducted for the purpose of determining the drag characteristics of six airships. The tests were made with airships of various shapes and sizes belonging to the Army, the Navy, and the Goodyear-Zeppelin Corporation. Drag coefficients for the following airships are shown: Army TC-6, TC-10, and TE-2; Navy Los Angeles and ZMC-2; Goodyear Puritan. The coefficients vary from about 0.045 for the small blunt airships to 0.023 for the relatively large slender Los Angeles. This variation may be due to a combination of effects, but the most important of these is probably the effect of length-diameter ratio.
Date:
March 2, 1931
Creator:
Thompson, F. L. & Kirschbaum, H. W.
System:
The UNT Digital Library
Lift and drag characteristics and gliding performance of an autogiro as determined in flight
From Summary: "This report presents the results of flight test of the Pitcairn "PCA-2" autogiro. Lift and drag coefficients with the propeller stopped have been determined over approximately a 90 degree range of angles of attack. Based on the sum of fixed-wing and swept-disk areas, the maximum lift coefficient is 0.895, the minimum drag coefficient with propeller stopped is 0.015, and the maximum l/d with propeller stopped is 4.8. Lift coefficients were found also with the propeller delivering positive thrust and did not differ consistently from those found with propeller stopped. Curves of gliding performance included in this report show a minimum vertical velocity of 15 feet per second at an air speed of 36 miles per hour and a flight-path angle of -17 degrees. In vertical descent the vertical velocity is 35 feet per second."
Date:
May 2, 1932
Creator:
Wheatley, John B.
System:
The UNT Digital Library
Determination of the theoretical pressure distribution for twenty airfoils
This report gives the theoretical distribution of pressure at lift coefficients of 0, 0.5, 1.0, and 1.5 for 20 airfoils, calculated on the basis of a rigorous potential theory of arbitrary airfoils. It also provides tables from which the characteristics of the airfoils for any angle of attack in 2-dimensional potential flow are readily calculable. The theoretical values of the angles of zero lift, the lift and moment coefficients, and the ideal angles of attack are listed and some comparisons with experiment are indicated. The results presented may be of value in predicting structural loads and also in a correlation of theoretical pressure gradients with profile resistance.
Date:
June 2, 1933
Creator:
Garrick, I. E.
System:
The UNT Digital Library
General Theory of Aerodynamic Instability and the Mechanism of Flutter
"The aerodynamic forces on an oscillating airfoil or airfoil-aileron combination of three independent degrees of freedom were determined. The problem resolves itself into the solution of certain definite integrals, which were identified as Bessel functions of the first and second kind, and of zero and first order. The theory, based on potential flow and the Kutta condition, is fundamentally equivalent to the conventional wing section theory relating to the steady case" (p. 291).
Date:
May 2, 1934
Creator:
Theodorsen, Theodore
System:
The UNT Digital Library
Cooling of airplane engines at low air speeds
Report presents the results of a comprehensive experimental study carried out at full scale in the NACA 20-foot wind tunnel, the general purpose of which is to furnish information in regard to the functioning of the power plant and propeller unit under different conditions. This report deals particularly with the problem of the cooling of an airplane engines on the ground. The influence of different nose forms, skirts, flaps, propellers, spinners, and special blowers has been investigated.
Date:
June 2, 1936
Creator:
Theodorsen, Theodore; Brevoort, M. J. & Stickle, George W.
System:
The UNT Digital Library
Model Study of Plans for Channel Improvement at Dogtooth Bend, Mississippi River, Folder 1
This memorandum, constitutes a report on the results of experiments conducted at the U. S. Waterways Experiment Station on a small scale model of that reach of the Mississippi River near and including Dogtooth Bend (Mile 32.7 above to Mile 4.0 below Cairo).
Date:
April 2, 1938
Creator:
Waterways Experiment Station (U.S.)
System:
The UNT Digital Library
The Effect of Continuous Weathering on Light Metal Alloys Used in Aircraft
"An investigation of the corrosion of light metal alloys used in aircraft was begun at the National Bureau of Standards in 1925 and has for its purpose causes of corrosion in aluminum-rich and magnesium-rich alloys together with the development of methods for its prevention. The results, obtained in an extensive series of laboratory and weather-exposure tests, reveal the relative durability of a number of commercially available materials and the extent to which the application of various surface coatings of oxide alone and with paint coatings afforded additional protection. The paper may be considered as a supplement to NACA report 490" (p. 395).
Date:
December 2, 1938
Creator:
Mutchler, Willard
System:
The UNT Digital Library
Flight Measurements of the Lateral Control Characteristics of an Airplane Equipped With a Combination Aileron-Spoiler Control System
Report presenting flight tests conducted to measure the lateral-control characteristics of an airplane, equipped with a lateral-control system, in which as the flaps are lowered the ailerons droop and a gradual transition of lateral control from ailerons to spoilers takes place. The variation of maximum rolling velocity with lateral stick movement as obtained in abrupt rudder-locked rolls was satisfactorily smooth except when control was by spoiler alone.
Date:
September 2, 1942
Creator:
Clousing, Lawrence A. & McAvoy, William H.
System:
The UNT Digital Library
[Observation on machining speeds and feeds]
This memorandum describes a trip on February 17th, 1944, in which the author stopped at the Baker Brothers Machine Company in Toledo to get the latest information on machining speeds and feeds and to determine the validity of their reported three pieces per hour per machine. The Baker Brothers reported that the three pieces per hour figure is an average given for determining delivery dates and allows for machining shapes other than a straight cylinder. They recommended a speed of 360 RPM for turning with a .010 feed.
Date:
March 2, 1944
Creator:
unknown
System:
The UNT Digital Library
Columbia Scaling Circuits
Abstract: "The advantages of high scaling ratios in counting random pulses are discussed. The mechanism of the basic circuit used in the Columbia University scaling circuits is described. The difficulties experienced in the performance of the earlier circuits are indicated and modified circuits to eliminate these difficulties are given. Precautions that must be observed in carrying out the constructional details are suggested. The complete circuit and specifications are given in detail for a Scale of 128 for use with linear-amplifier systems" (p. 1).
Date:
May 2, 1944
Creator:
Glassford, H. A. & Dunning, J. R.
System:
The UNT Digital Library
Hanford Engineer Works technical progress letter No. 8, August 25--August 31, 1944
This barely legible document describes the canning process, autoclave tests, slug weight distributions, and general information on progress in the 100 Area to include: Reactor physics, corrosion, instrument development, plant assistance, slug recovery, outgassing, sniffer tests, statistics, and analytical services.
Date:
September 2, 1944
Creator:
Bugbee, S. J.
System:
The UNT Digital Library
Technical report for the period August 1, 1944 to September 30, 1944
None
Date:
October 2, 1944
Creator:
Willson, K. S.
System:
The UNT Digital Library
Correlation of the drag characteristics of a typical pursuit airplane obtained from high-speed wind-tunnel and flight tests
In order to obtain a correlation of drag data from wind-tunnel and flight tests at high Mach numbers, a typical pursuit airplane, with the propeller removed, was tested in flight at Mach numbers up to 0.755, and the results were compared with wind-tunnel tests of a 1/3-scale model of the airplane. The tests results show that the drag characteristics of the test airplane can be predicted with satisfactory accuracy from tests in the Ames 16-foot high-speed wind tunnel of the Ames Aeronautical Laboratory at both high and low Mach numbers. It is considered that this result is not unique with the airplane.
Date:
November 2, 1944
Creator:
Nissen, James M.; Gadeberg, Burnett L. & Hamilton, William T.
System:
The UNT Digital Library
Effect of Radiation on Chromate in Water. III. Inhibition Experiments in the CP-3 Pile
Abstract. The effect of various inhibitors on the production of CrIII in W waters containing chromatic has been studies at a variety of pH's in the CP-3 pile. The addition of 2 ppm NaClO3 appears to have little effect a a pH of 5.3, but 2 ppm NaClO3 cr 0.15 ppm of Cl2 (in the form of NaOCl) somewhat decreases the amount of chromatic reduced at a pH of 7.1. The inhibition is not great enough, however, to reduce the amount of CrIII formed to the maximum concentration permissible at W (0.02 ppm). The addition of 3 ppm (NH4)2S2O3 as an inhibiter will permit W water to be used a a Ph of 7.0, but not at a pH of 6.5 as far as chromate reduction is concerned. The concentration of CrIII would be 0.01 ppm and 0.05 ppm, respectively, after one passage through the pile. Previous conclusion as to the effects of temperature, pH, intensity and the addition of ammonium persulfate, which had been reached from experiments with simulation W water, have been checked by studies with solutions made from water chipped directly from Hanford. All of the effects noted were found to be similar to those already reported, …
Date:
November 2, 1944
Creator:
Bowman, M. G.; Burton, Milton, 1902-; Davis, S. G., 1907-; Ghormley, J. A. & Gordon, S.
System:
The UNT Digital Library