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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

[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
open access

The Deposition of Plutonium and Certain Fission Products in Bone as a Decontamination Problem

Description: The following report discusses the deposition of radioactive elements during a nuclear fission in the skeleton. Studies are concerned with chronic effects of toxic radiation developing within the bone marrow and decontaminating the cells.
Date: May 15, 1946
Creator: Copp, D. Harold; Greenberg, David M. & Hamilton, Joseph G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Some Notes on the Effects of Jet-Exit Design on Static Longitudinal Stability

Description: Report discussing several types of jet-exit designs, including normal, beveled, and unsymmetrical shapes, and their effect on the stability characteristics of the aircraft. No deviation of the jet center line from its exposed path is likely to be obtained if a jet exist is used that is normal to the flow. Having a tilted or asymmetrical exit was found to adversely affect the stability of the aircraft.
Date: May 1946
Creator: Gillis, Clarence L. & Weil, Joseph
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tests of the Jet-Motor Air-Intake Duct System on a 1/4-Scale Stub-Wing Model of a Pursuit-Type Airplane

Description: Report discussing the characteristics of the jet-motor air-intake duct system for a pursuit-type airplane with modifications to the duct system. Details of its effects on the Mach number, high pressure recovery, drag, and simplicity of the system are provided. Problems regarding the flow condition through the ducts and some potential modifications to prevent further issues are also described.
Date: May 1946
Creator: Hanson, Frederick H., Jr.
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

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

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
open access

Strain Measurements and Strength Tests of 25-Inch Diagonal-Tension Beams of 75S-T Aluminum Alloy

Description: Note presenting a series of diagonal-tension beams tested to determine the accuracy of previously published design charts and formulas for beams of 24S-T aluminum alloy when used to analyze beams of 75S-T aluminum alloy. Results regarding stresses in the uprights, failure of the uprights, and web failure of beam 8 are provided.
Date: May 1946
Creator: Peterson, James P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Stresses Around Large Cut-Outs in Torsion Boxes

Description: The problem treated here is that of the stresses in a torsion box with a large rectangular cut-out. The theoretical treatment is confined to stresses termed the 'primary stresses.' Comparison of the theoretical results with strain gage data for a series of cut-outs indicates that the primary stresses are probably adequate for designing the major part of the structure, the only important exception being in the design of the cover sheet in the full section adjacent to the cut-out.
Date: May 1946
Creator: Kuhn, Paul & Moggio, Edwin M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wind Tunnel Investigation of Effect of Wing Location, Power, and Flap Deflection on Effective Dihedral of a Typical Single-Engine Fighter-Airplane Model With Tail Removed

Description: Note presenting an investigation of the effect of wing location, power, and flap deflection on the effective dihedral of a typical single-engine fighter-airplane model. The model, which was tested in the 7- by 10-foot tunnel, had provisions for placing the wing in either one of two vertical locations. The results are presented as curves of lateral-stability derivatives against lift coefficient.
Date: May 1946
Creator: Tucker, Warren 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

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

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

Tank Tests to Determine the Effect of Varying Design Parameters of Planing-Tail Hulls 1: Effect of Varying Length, Width, and Plan-Form Taper of Afterbody

Description: Report presenting tests conducted in tank no. 2 on models of an unconventional flying-boat hull called a planing-tail hull to determine the effects on resistance of varying a number of afterbody parameters. The effects of varying length, width, and plan-form taper of the afterbody are explored. Results regarding the effect of decreasing width of the afterbody, effect of increasing length of the afterbody, effect of tapering afterbody, and a comparison of planing-tail hulls with a conventional h… more
Date: May 1946
Creator: Dawson, John R.; Walter, Robert C. & Hay, Elizabeth S.
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

Wind-Tunnel Investigation of the Effect of Canopies on Directional Stability Characteristics of a Single Engine Airplane Model

Description: Note presenting a low-wing, single-engine airplane model tested in the stability tunnel to obtain data showing the effect of canopy size and shape on the directional stability characteristics of the model. Generally, the addition of a canopy to the model decreased the directional stability of the model.
Date: May 1946
Creator: MacLachlan, Robert & Levitt, Joseph
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

Note on the Theorems of Bjerknes and Crocco

Description: "The theorems of Bjerknes and Crocco are of great interest in the theory of flow around airfoils at Mach numbers near and above unity. A brief note shows how both theorems are developed by short vector transformations" (p. 1).
Date: May 1946
Creator: Theodorsen, Theodore
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tests of a full-scale horizontal tail surface in the Langley 16-foot high-speed tunnel

Description: Report presenting testing to determine the aerodynamic characteristics of a full-scale semispan horizontal tail surface of a fighter airplane at a range of mach numbers. The results presented show the effects of elevator nose shape, elevator trailing-edge angle, and trailing-edge strips on the aerodynamic characteristics.
Date: May 1946
Creator: Schueller, Carl F.; Korycinski, Peter F. & Strass, H. Kurt
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
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