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Determination of Shapes of Boattail Bodies of Revolution for Minimum Wave Drag

Description: "By use of an approximate equation for the wave drag of slender bodies of revolution in a supersonic flow field, the optimum shapes of certain boattail bodies are determined for minimum wave drag. The properties of three specific families of bodies are determined, the first family consisting of bodies having a given length and base area and a contour passing through a prescribed point between the nose and base, the second family having fixed length, base area, and maximum area, and the third family having given length, volume, and base area. The method presented is easily generalized to determine minimum-wave-drag profile shapes which have contours that must pass through any prescribed number of points" (p. 1).
Date: August 21, 1951
Creator: Adams, Mac C.
Partner: UNT Libraries Government Documents Department
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Investigation of a triangular wing in conjunction with a fuselage and horizontal tail to determine downwash and longitudinal-stability characteristics: transonic bump method

Description: Report presenting the results of an experimental investigation of the downwash and longitudinal stability characteristics of a semispan, triangular-wing airplane model with a horizontal tail. Lift, drag, and pitching-moment data re presented for the wing-fuselage combination. Results indicated that the model with the tail on or below the wing-chord plane possessed satisfactory stability characteristics throughout the test range of lift coefficient.
Date: August 17, 1951
Creator: Allen, Edwin C.
Partner: UNT Libraries Government Documents Department
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Calculated effects of turbine rotor-blade cooling-air flow, altitude, and compressor bleed point on performance of a turbojet engine

Description: Effects of air-cooling turbine rotor blades on performance of a turbojet engine were calculated for a range of altitudes from sea level to 40,000 feet and a range of coolant flows up to 3 percent of compressor air flow, for two conditions of coolant bleed from the compressor. Bleeding at required coolant pressure resulted in a sea-level thrust reduction approximately twice the percentage coolant flow and in an increase in specific fuel consumption approximately equal to percentage coolant flow. For any fixed value of coolant flow ratio the percentage thrust reduction and percentage increase in specific fuel consumption decreased with altitude. Bleeding coolant at the compressor discharge resulted in an additional 1 percent loss in performance at sea level and in smaller increase in loss of performance at higher altitudes.
Date: August 13, 1951
Creator: Arne, Vernon L. & Nachtigall, Alfred J.
Partner: UNT Libraries Government Documents Department
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Effect of Stress-Solvent Crazing on Tensile Strength of Polymethyl Methacrylate

Description: Note presenting an investigation of the loss of strength of tensile specimens of polymethyl methacrylate as a result of stress-solvent crazing at 23 degrees Celsius and 50-percent relative humidity. the materials tested were commercial cast polymethyl-methacrylate sheets of both heat-resistant and ordinary grades from each of two manufacturers.
Date: August 1951
Creator: Axilrod, B. M. & Sherman, Martha A.
Partner: UNT Libraries Government Documents Department
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Employment Criteria of the Community and Recommended Business Curriculum for Frank Phillips College, Borger, Texas

Description: The purpose of this survey and study is to attempt the establishment of ways in which the business administration department of Frank Phillips College may help its students to prepare to fill the employment needs in the commercial offices of the area.
Date: August 1951
Creator: Ayers, Paul J.
Partner: UNT Libraries
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Shield for Water Boiler

Description: Siimplified shielding calculations indicating the proposed design for the water boiler assembly will reduce the radiation at normal operaton to values well below those which are considered tolerable.
Date: August 8, 1951
Creator: Balent, R.
Partner: UNT Libraries Government Documents Department
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List of equipment changes required for the production of various model sizes on the RMA and RMB lines, 234-5 Building

Description: In order to change models on the RM Line, a number of equipment items must be either replaced or modified. Some items may not necessarily require replacement depending upon the severity of the change. The attached list of items will require replacement or modification before production can be shifted from the present model to any of the others previously produced at this plant. The equipment is part of the Remote Mechanical A and B lines of the Plutonium Finishing Plant.
Date: August 29, 1951
Creator: Beaulieu, O.F.
Partner: UNT Libraries Government Documents Department
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Flight Determination of the Effects of Wing Vortex Generators of the Aerodynamic Characteristics of the Douglas D-558-I Airplane

Description: Report presenting testing using a Douglas D-558-I airplane to determine the effect of wing vortex generators on some of the undesirable handling characteristics of aircraft flying at hypercritical speeds. The effects on buffeting, lateral unsteadiness, change in trim, and loss of control effectiveness were the primary objectives.
Date: August 14, 1951
Creator: Beeler, De E.; Bellman, Donald R. & Griffith, John H.
Partner: UNT Libraries Government Documents Department
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Free-flight-tunnel investigation of the dynamic lateral stability and control characteristics of a high-aspect-ratio bomber model with self-supporting free-floating fuel tanks attached to the wing tips

Description: Report presenting an investigation in the free-flight tunnel to determine the dynamic lateral stability and control characteristics of a high-aspect-ratio bomber model with self-supporting, free-floating fuel tanks attached to the wing tips. The results showed that the flight behavior of the configuration could be made satisfactory when sufficient restoring moment was supplied. Results regarding the flight behavior, rolling motions, motions of the bomber and attached tanks, and flight records for different gearing ratios are provided.
Date: August 7, 1951
Creator: Bennett, Charles V. & Cadman, Robert B.
Partner: UNT Libraries Government Documents Department
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An investigation of aircraft heaters 36: preliminary investigation of a combustion-type aircraft heater

Description: Report presenting experimental results on the thermal performance of an aircraft combustion-type heater. The performance of the heater with a counterflow and a parallel-flow return passage on the gas side does not appear predictable by use of existing equations. The thermal conductance for the gases within the combustion chamber is predicted to be many times lower than the experimental data indicate.
Date: August 1951
Creator: Boelter, L. M. K.; Elswick, W. R.; Sanders, V. D. & Rubesin, M. W.
Partner: UNT Libraries Government Documents Department
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An Investigation of Aircraft Heaters 34: Experimental Determination of Thermal and Hydrodynamical Behavior of Air Flowing Between a Flat and a Wave-Shaped Plate

Description: Report presenting an investigation of the thermal and hydrodynamical behavior of air flowing along a passage with one flat side, which was steam-heated, and one wave-shaped side, which was unheated. Two series of tests were conducted, one with the plates in direct opposition and one with the plates slightly separated, which induced turbulence upstream of the thermal boundary layer. Results regarding heat transfer and static-pressure drop are provided.
Date: August 1951
Creator: Boelter, L. M. K.; Sanders, V. D.; Young, G.; Morgan, M. & Morrin, E. H.
Partner: UNT Libraries Government Documents Department
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Growth and Urbanization of the Texas Population, 1940-1950

Description: It is the purpose of this thesis to consider the growth and urbanization of the Texas population since 1880, with primary emphasis on changes which took place during the decade from 1940-1950. The problem involved, therefore, in the second part of this study is to determine the amount of urbanization which took place in Texas during the 1940-1950 decade, to determine the variations among the several regions and "size groups" of cities, and to describe some of the factors related to such increases and variations.
Date: August 1951
Creator: Boulter, Oscar H.
Partner: UNT Libraries
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Investigation of Minimum Drag and Maximum Lift-Drag Ratios of Several Wing-Body Combinations Including a Cambered Triangular Wing at Low Reynolds Numbers and at Supersonic Speeds

Description: Report presenting testing of wing-body combinations incorporating several wing plan forms of theoretical interest at Mach numbers of 1.62, 1.93, and 2.41 in the supersonic tunnel. One triangular, one arrow, and tow diamond plan forms were tested. Results regarding minimum drag, lift-curve slope, center-of-pressure positions, drag due to lift, and lift-drag ratios are provided.
Date: August 6, 1951
Creator: Brown, Clinton E. & Hargrave, L. K.
Partner: UNT Libraries Government Documents Department
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A Critical Review of Notch Sensitivity in Stress-Rupture Tests

Description: Note presenting a review of English and German literature on notch stress-rupture data, which included the effect of notching on rupture strength in general, the effect of chemical composition and heat treatment on notch stress-rupture characteristics, the mechanism of stress-rupture embrittlement and notch sensitivity in low-alloy steels, and a comparison of the influence of notch geometry on notch strength in stress-rupture tests and in conventional tensile tests.
Date: August 1951
Creator: Brown, W. F., Jr. & Sachs, George
Partner: UNT Libraries Government Documents Department
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[Generals Orders - Eighth United States Army]

Description: Generals orders from the desk of Major General Leven C. Allen, typed up by R. L. Butt, Jr. The orders are in regards to the men awarded the Silver Star, the Bronze Star, Air Medal - Award and the Commendation Ribbon. Lieutenant Colonel Olinto M. Barsanti has been awarded the Silver Star, for gallantry in action during a counter-attack of the enemy in the vicinity of Inje, Korea.
Date: August 2, 1951
Creator: Butt, R. L., Jr.
Partner: UNT Libraries Special Collections
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Evidences of Modern Architectural Design in Public School Buildings of Denton, Texas

Description: In this study the public-school buildings of Denton are examined for evidences of modern architectural design. Chapter I serves as an introduction. Chapter II presents a history of the Denton Public Schools. Chapter III presents standards for evaluating modern school architecture. Features of existing school buildings, built earlier than 1964, which, in character, exemplify modern architectural design are described in Chapter IV. The three school buildings built since 1946 and the one under construction are described in detail and evaluated according to the standards given. Representative photostatic reproduction and photographs illustrate the text. In Chapter V a summary of the study is given and conclusions are presented.
Date: August 1951
Creator: Carden, Mary Mildred
Partner: UNT Libraries
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The Effects of Atomic Weapons on Glazing and Window Construction. Annex 3.5 of Scientific Director's Report of Atomic Weapon Tests at Eniwetok. 1951. Operation Greenhouse

Description: BS>Various types of wood, steel, and aluminum window construction, glazed with plastic and different kinds of glass, were installed on four sides of a test structure during the greenhouse tests in order to determine their relative resistance to an atomic blast. The degree of protection from flying glass provided by mounting Venetian blinds, insect screens, and 1/4-in. mesh wire netting on the inside of window openings was also determined. The best results seem to indicate that the resistances of different types of glass to an atomic blast are approximately proportional to their strength in supporting static loads. Glass mounted in a rigid frame is less likely to be broken than if mounted in a flexible frame which may be distorted by the blast. Fragments from wire or safety glass are less dangerous to personnel than fragments from other types of glass, and plastic is less likely to break than glass, Commercial types of Venetian blinds and insect screens afforded littie or no protection against flying glass fragments at the distance at which tested; however, a blind with some of the parts reinforced and properly anchored to the window opening would. probably give some protection at a distance of 3 miles from the explosion or if closed, would probably give tull protection against heat waves at 2 miles. Wire netting with 1/4-in. mesh installed on the inside of window openings proved effective in stopping all except very small glass fragments. Lightweight, double- hung, wooden windows with sashes glazed with small panes supported by narrow muntins offer little resistance to an atomic blast. Although much valuable data were obtained, it was concluded that additional investigations are needed. (auth)
Date: August 1, 1951
Creator: Clark, W.C.
Partner: UNT Libraries Government Documents Department
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A Study to Determine the Differences in Scholastic Achievement and Sociometric Standing Between Children from Broken and Unbroken Homes

Description: The problem presented in this study is to determine if any differences exist in the sociometric standing and the scholastic achievement between children from broken homes and children from unbroken homes. The purpose of the study is to make a comparison of the sociometric standing and scholastic achievement of two selected groups of pupils to determine if differences exist and to what extent they exist.
Date: August 1951
Creator: Cooke, Eunyce Allen
Partner: UNT Libraries
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Transformations of the Hodograph Flow Equation and the Introduction of Two Generalized Potential Functions

Description: Note presenting some sets of solutions studied independently of the gas laws and some properties of the series obtained by means of these sets. The equations have been further transformed so as to have as independent variables the complex velocity and the complex mass velocity.
Date: August 1951
Creator: Crocco, Luigi
Partner: UNT Libraries Government Documents Department
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