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Analysis of Available Data on the Effects of Tabs on Control-Surface Hinge Moments

Description: From Introduction: "A collection balanced-aileron test data is given in reference 1. Reference 2 presents a collection of data applicable to the design of tail surfaces. The results of analyses of data for control surfaces with internal balances, plain-overhang and Frise balances, beveled trailing edges, and unshielded horn balances have already been published in references 3 to 6."
Date: May 1946
Creator: Crandall, Stewart M. & Murray, Harry E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Analysis of the Factors Affecting the State of Fuel and Air Mixtures

Description: From Introduction: "It is the purpose of this paper to describe the physical properties that are necessary to specify mixture quality in a system containing fuel and dry air and to evaluate the theoretical rolation between these properties and the physical properties of the mixture."
Date: May 1946
Creator: Gilbert, Mitchell; Howard, John N. & Hicks, Bruce L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bending-Torsion Flutter Calculations Modified by Subsonic Compressibility Corrections

Description: Report presenting a number of calculations of bending-torsion wing flutter at two Mach numbers and a comparison of the results. The results indicated that the effect of compressibility on flutter speed for subsonic speeds with no shocks, although complicated, is relatively small in the usual cases.
Date: May 1946
Creator: Garrick, I. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Beta-Gamma Hand and Foot Counters

Description: Abstract: This is basically a counting rate meter, with an alarm circuit, operating from four GM tubes as the detecting elements. The Hand Counter comprises four logarithmic counting rate meters working from four GM tubes mounted individually, with associated electronic circuits, in suitable shields with a metal mesh type of window. Both sides of both hands are sampled simultaneously. In the Foot Counter, two GM tubes are separately and mounted in a suitable mesh window shielded with the el… more
Date: May 1946
Creator: Bradley, W. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Catalog of North Texas State Teachers College: 1946-1947

Description: Catalog for North Texas State College includes information about class offerings as well as general information about the school (academic calendar, list of officers and faculty, admissions and degree requirements, financial information, etc.).
Date: May 1946
Creator: North Texas State Teachers College
Item Type: Refine your search to only Book
Partner: UNT Libraries Special Collections
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Charts of Thermodynamic Properties of Fluids Encountered in Calculations of Internal Combustion Engine Cycles

Description: "A single chart has been prepared that simplifies the calculation of the thermodynamic properties of air, various octene-air mixtures, and mixtures of those with their products of combustion at all temperatures below which chemical dissociation becomes unimportant. The chart is based on the use of 1 pound mol of mixture, and examples of its use are given in the form of the calculation of a turbocompressor power plant and a supercharged Otto engine cycle" (p. 1).
Date: May 1946
Creator: Hottel, H. C. & Williams, G. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Column and Plate Compressive Strengths of Aircraft Structural Materials: Extruded 14S-T Aluminum Alloy

Description: "Column and plate compressive strengths of extruded 14S-T aluminum alloy were determined both within and beyond the elastic range from tests of flat-end H-section columns and from local-instability tests of H-, Z-, and channel-section columns. These tests are part of an extensive research investigation to provide data on the structural strength of various aircraft materials. The results are presented in the form of curves and charts that are suitable for use in the design and analysis of aircra… more
Date: May 1946
Creator: Heimerl, George J. & Niles, Donald E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of measured and calculated stresses in built-up beams

Description: Web stresses and flange stresses were measured in three built-up beams: one of constant depth with flanges of constant cross-section, one linearly tapered in depth with flanges of constant cross section, and one linearly tapered in depth with tapered flanges. The measured stresses were compared with the calculated stresses obtained by the methods outlined in order to determine the degree of accuracy that may be expected from the stress analysis formulas. These comparisons indicated that the ave… more
Date: May 1946
Creator: Levin, L. Ross & Nelson, David H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of several methods of predicting the pressure loss at altitude across a baffled aircraft-engine cylinder

Description: Report presenting several methods of predicting the compressible-flow pressure loss across a baffled aircraft-engine cylinder that were analytically and experimentally investigated on a typical air-cooled aircraft-engine cylinder. Results regarding the evaluation of data, comparative accuracy of correction methods, and ability to apply information about heat transfer to compressible-flow pressure-drop predictions are provided.
Date: May 1946
Creator: Neustein, Joseph & Schafer, Louis J., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of Static Strengths of Machine Countersunk Riveted Joints in 24S-T, X75S-T, and Alclad 75S-T Sheet

Description: Note presenting static tests made on machine-countersunk riveted joints in 24S-T, X75S-T, and Alclad 75S-T sheet using A17S-T and 24S-T rivets. In order to intensify the cutting action of the rivets, all specimens were made with the depth of countersink just equal to the thickness of the sheet.
Date: May 1946
Creator: Hartmann, E. C. & Zamboky, A. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of Two-Dimensional Air Flows About an NACA 0012 Airfoil of 1-Inch Chord at Zero Lift in Open and Closed 3-Inch Jets and Corrections for Jet-Boundary Interference

Description: Note presenting pressure distributions and schileren photographs for the high-speed flow about a symmetrical airfoil at zero lift in open and closed jets in order to show the nature of the jet-boundary interference. Results regarding the application of jet-boundary-interference theory, analysis of experimental wall-interference data and comparison with theory, conditions near choking, and change of velocity ratio with Mach number are provided.
Date: May 1946
Creator: Wright, Ray H. & Donaldson, Coleman duP.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of brake forming on the strength of 24S-T aluminum-alloy sheet

Description: Tests were made to determine the effect of brake forming on the strength of 24S-T aluminum alloy sheet that had been formed to an inside bend radius of three times the sheet thickness. The results for both directions of the grain of the material showed that the compressive yield stresses were appreciably increased, that the tensile yield stresses were moderately increased, that the ultimate tensile stresses were only slightly increased, that the elongations were considerably reduced, and that t… more
Date: May 1946
Creator: Heimerl, George J. & Woods, Walter
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Compressibility on Section Characteristics of an Airfoil With a Round-Nose Slotted Fraise Aileron

Description: Report presenting compressibility effects on the aerodynamic section characteristics of an airfoil with a round-nose slotted Frise aileron for various pressure distributions and angles of attack. Previous testing with sharp-nose ailerons demonstrated heavy stick forces at large aileron deflections, leading to testing on the round-nose aileron. Results regarding control effectiveness characteristics, aileron hinge-moment coefficient, Frise aileron critical speeds, section aileron loads, and othe… more
Date: May 1946
Creator: Luoma, Arvo A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of the NACA Injection Impeller on the Mixture Distribution of a Double-Row Radial Aircraft Engine

Description: For the normal range of engine power the impeller provided marked improvement over the standard spray-bar injection system. Mixture distribution at cruising was excellent, maximum cylinder temperatures were reduced about 30 degrees F, and general temperature distribution was improved. The uniform mixture distribution restored the normal response of cylinder temperature to mixture enrichment and it reduced the possibility of carburetor icing, while no serious loss in supercharger pressure rise r… more
Date: May 1946
Creator: Marble, Frank E.; Ritter, William K. & Miller, Mahlon A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of Axial-Plane Curvature and Passage-Area Variation on Flow Capacity of Radial-Discharge Impeller with Conventional Inlet Buckets

Description: Note presenting an experimental radial-discharge impeller designed to have, by comparison with conventional impellers, a long radius of axial-plane curvature, a large axial depth, and a small inlet-blade root diameter. The impeller was tested as part of an investigation to improve the flow capacity of radial impellers. Results regarding the comparative volume-flow characteristics of the basic experimental impeller, effect of passage-area variation on performance of the basic experimental impell… more
Date: May 1946
Creator: Ritter, William K.; Ginsburg, Ambrose & Redlitz, Alfred G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The effects of various parameters on the load at which spray enters the propellers of a flying boat

Description: Report presenting the results of experiments with a technique for investigating the spray characteristics of flying-boat models. The forebody of a pointed-step flying boat hull was used for testing, and the effects of varying trim, propeller position, and amount of power were investigated. Either of the two types of spray that emanate from a forebody can limit the gross load of a flying boat depending on the configuration.
Date: May 1946
Creator: Dawson, John R. & Walter, Robert C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A General Method of Selecting Foam Inhibitors

Description: Note presenting a criterion for selecting foam inhibitors from insoluble liquids that form emulsions with the foaming liquid. By determining the surface tensions of the foaming liquid and of the additive saturated with that liquid and the interfacial tension between them, spreading and entering coefficients may be calculated. A mechanism of foam inhibition is also described.
Date: May 1946
Creator: Robinson, J. V. & Woods, W. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydraulic Characteristics of the NACA Injection Impeller

Description: Report discussing a mock-up injection impeller created to investigate the hydraulic characteristics and limitations of the NACA injection impeller currently in use. Information about the form and magnitude of critical factors of fuel-transfer leakage and peripheral fuel distribution is provided as well as the effects of design variations of components on hydraulic characteristics. Several revisions in portions of the impeller are suggested to improve its fuel-transfer, fuel-pumping, and fuel-eq… more
Date: May 1946
Creator: Ritter, William K.; Johnsen, Irving A. & Lieblein, Seymour
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[Illustrations from Esquire Gallery Magazine]

Description: Page from Esquire magazine featuring illustrations of women and descriptive text. On the first page, a redhead esquire girl shows her back along with the phrase " He told me if men ever paid any attention to a lot of frivolous objections like that, the human race would have perished ages ago". On the facing page, a painting by Harper Goff of a canary yellow plane passing the lady liberty with military ships floating in the background. The painting was done in celebration of Wilbur Wright's flig… more
Date: May 1946
Creator: Goff, Harper
Item Type: Refine your search to only Clipping
Partner: UNT Libraries Special Collections
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Investigations on Laminar Boundary-Layer Stability and Transition on Curved Boundaries

Description: Report presenting an investigation of the transition of the boundary layer from the laminar to the turbulent region on a flat plate, on the concave and convex side of a plate with a 20-foot radius of curvature, and on the convex side of a plate with a 30-inch radius of curvature.
Date: May 1946
Creator: Liepmann, Hans W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Knock-Limited Performance of Fuel Blends Containing Spiropentane, Methylenecyclobutane, Di-Tert-Butyl Ether, Methyl Tert-Butyl Ether, and Triptane

Description: Tests show that at inlet-air temperatures of 250 deg F and 100 deg F the knock-limited performance of the base fuel of blends, leaded with 4 ml TEL per gallon and containing 20 percent spiropentane, was reduced at fuel/air ratios below 0.085. The 20 percent methylenecyclobutane reduced the knock-limited power of the base fuel at fuel/air ratios below 0.112. Di-tert-butyl ether, methyl-tert-butyl ether, and triptane increased the knock-limited power of the base fuel at all fuel/air ratios and at… more
Date: May 1946
Creator: Meyer, Carl L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Lifting-Surface-Theory Results for Thin Elliptic Wings of Aspect Ratio 3 with Chordwise Loadings Corresponding to 0.5-Chord Plain Flap and to Parabolic-Arc Camber

Description: Note presenting an investigation of the electromagnetic-analogy method used to provide lifting-surface-theory solutions applicable to the determination of aspect-ratio corrections for the slope of the curve of hinge-moment coefficient against flap deflection. A comparison of the results of the present measurements with those of previous tests indicated that the increment of induced downwash at the 0.5-chord line over the value predicted by lifting-line theory is a linear function of the center-… more
Date: May 1946
Creator: Crandall, Stewart M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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