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Coal-Mine Accidents in the United States, 1941

Description: Report compiled by the U.S. Bureau of Mines including statistics on fatal and non-fatal accidents in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date: 1944
Creator: Adams, William W. & Geyer, L. E.
Item Type: Refine your search to only Report
open access

Coal-Mine Accidents in the United States, 1942

Description: Report compiled by the U.S. Bureau of Mines including statistics on fatal and non-fatal accidents in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date: 1944
Creator: Adams, W. W. & Geyer, L. E.
Item Type: Refine your search to only Report
open access

Coal-Mine Explosions and Coal- and Metal-Mine Fires in the United States During the Fiscal Year Ended June 30, 1943

Description: Report issued by the U.S. Bureau of Mines discussing coal mine fires and explosions during the fiscal year of 1943. Causes of the fires and explosions are presented, as well as the number of fatalities from each. This report includes tables, and illustrations.
Date: February 1944
Creator: Harrington, D. & Fene, W. J.
Item Type: Refine your search to only Report
open access

Collection of Balanced-Aileron Test Data

Description: "Test data of balanced ailerons have been collected from NACA and British sources. These data, which are presented in the form of charts, are grouped as A - ailerons with Frise balances, B - ailerons with blunt-nose balances, C - ailerons with internal balances, D - ailerons with contour modifications, and E - ailerons with tabs. Results of flight tests and of wind-tunnel tests in both two- and three-dimensional flow are presented but no correlation nor resume of the data has been included" (p.… more
Date: January 1944
Creator: Rogallo, F. M.
Item Type: Refine your search to only Report

College women in the WAC.

Description: Poster of three photographs with text descriptions, each showing three young women (seniors from the Vassar College Class of 1944) involved in various Women's Army Corps recruitment activities: trying on a WAC hat, signing up for WAC, and pledging the oath of enlistment. The young women wear cardigan sweaters, skirts, and loafers. Older women in WAC uniforms appear in two of the photographs. The three students who appear in the photos are: Marjorie Maddox, Maud Banks, and Joan Trumbull. The two… more
Date: 1944
Creator: United States. Army. Women's Army Corps.
Item Type: Refine your search to only Poster
open access

Columbia Scaling Circuits

Description: 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 Sc… more
Date: May 2, 1944
Creator: Glassford, H. A. & Dunning, J. R.
Item Type: Refine your search to only Report
open access

Comparative Cooling of Cylinders of Nonuniform Fin Width With Tight-Fitting Baffles and With Baffles That Provide Constant Flow-Path Areas

Description: Report presenting an investigation using tight-fitting baffles on the cooling fins of several modern air-cooled engine cylinders in order to maintain a constant free-flow area from the front to the rear of each interfin air passage. Results regarding the effect of restriction in cooling-air flow paths on cylinder temperature and effect of restrictions in cooling-air flow paths on cooling-air mass flow are provided.
Date: April 1944
Creator: Schey, Oscar W.; Rollin, Vern G. & Buckner, Howard A., Jr.
Item Type: Refine your search to only Report
open access

Comparative Results of Tests on Several Different Types of Nozzles

Description: "This paper presents the results of tests conducted to determine the effect of the constructional elements of a Laval nozzle on the velocity and pressure distribution and the magnitude of the reaction force of the jet. The effect was studied of the shapes of the entrance section of the nozzle and three types of divergent sections: namely, straight cone, conoidal with cylindrical and piece and diffuser obtained computationally by a graphical method due to Professor F. I. Frankle. The effect of t… more
Date: June 1944
Creator: Kisenko, M. S.
Item Type: Refine your search to only Report
open access

Comparative Tests of the Strength and Tightness of Commercial Flush Rivets of One Type and NACA Flush Rivets in Machine-Countersunk and Counterpunched Joints

Description: 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.
Item Type: Refine your search to only Report
open access

Comparison of an approximate and an exact method of shear-lag analysis

Description: Report presenting comparisons between the approximate substitute single-stringer method of shear-lag analysis and the exact solutions, which indicate that for beams of practical proportions the approximate method yields a value for the maximum root stress that exceeds the value obtained by use of the exact solution by less than 10 percent.
Date: January 1944
Creator: Duberg, John E.
Item Type: Refine your search to only Report
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Comparison of calculated and experimental propeller characteristics for four-, six-, and eight-blade single-rotating propellers

Description: Report presenting the calculated performance of four-, six-, and eight-blade single-rotating propellers compared with experimental results for blade angles ranging from 25 to 65 degrees. The data were obtained on propellers mounted in front of a streamline body with a spinner housing the hub.
Date: February 1944
Creator: Crigler, John L.
Item Type: Refine your search to only Report
open access

Comparison of the compressive strength of panels with Alclad 24S-T81 sheet or with Alclad 24S-T86 sheet riveted to Alclad 24S-T84 hat-section stiffeners

Description: From Summary: "Compression tests were made of two groups of panel specimens with hat-section stiffeners. The groups were identical except that the flat sheet of one group was Alclad 24S-T81 and of the other Alclad 24S-T86. Results of the tests are given in tables or charts which show the average stress at which the sheet buckles and the average stress at the maximum load."
Date: April 1944
Creator: Weinberger, Robert A.; Rossman, Carl A. & Fisher, Gordon P.
Item Type: Refine your search to only Report
open access

A Comparison of the Effects of Four-Blade Dual- and Single-Rotation Propellers on the Stability and Control Characteristics of a High-Powered Single-Engine Airplane

Description: Report presenting a scale powered model of the Douglas XSB2D-1 airplane tested with a four-blade dual-rotation propeller and a four-blade single-rotation propeller. To make the results more directly comparable, no other changes were made to the model. Results regarding longitudinal stability, directional characteristics, and lateral stability are provided.
Date: June 1944
Creator: Harper, Charles W. & Wick, Bradford H.
Item Type: Refine your search to only Report
open access

A comparison of three spinner-diffuser designs in an NACA D(sub S) cowling for the Pratt & Whitney R-2800 engine

Description: Report presenting testing to determine which of three spinner-diffuser designs on an NACA cowling was the most effective in cooling a Pratt & Whitney R-2800 engine installation. The results of pressure-distribution studies in front of and behind each bank of cylinders are presented for a wide range of propeller-operating conditions.
Date: June 1944
Creator: Habel, Louis W. & Korycinski, Peter F.
Item Type: Refine your search to only Report
open access

Comparison of Yaw Characteristics of a Single-Engine Airplane Model With Single-Rotating and Dual-Rotating Propellers

Description: Report presenting testing in the pressure tunnel to determine the yaw characteristics of a scale model of a single-engine, fighter-type airplane with six-blade single-rotating and dual-rotating propellers. Force and moment characteristics are presented for several model and power conditions.
Date: April 1944
Creator: Neely, R. H.; Fogarty, L. E. & Alexander, S. R.
Item Type: Refine your search to only Report
open access

Compressibility and Heating Effects on Pressure Loss and Cooling of a Baffled Cylinder Barrel

Description: Report presenting testing to obtain experimental confirmation of the effect of air compressibility on cooling and pressure loss of a baffled cylinder barrel and to evaluate various methods of analysis. Testing occurred over a wide range of air flows and density altitudes.
Date: July 1944
Creator: Goldstein, Arthur W. & Ellerbrock, Herman H., Jr.
Item Type: Refine your search to only Report
open access

Compressibility and Heating Effects on Pressure Loss and Cooling of a Baffled Cylinder Barrel

Description: "Theoretical investigations have shown that, because air is compressible, the pressure-drop requirements for cooling an air-cooled engine will be much greater at high altitudes and high speeds than at sea level and low speeds. Tests were conducted by the NACA to obtain some experimental confirmation of the effect of air compressibility on cooling and pressure loss of a baffled cylinder barrel and to evaluate various methods of analysis. The results reported in the present paper are regarded as … more
Date: July 1, 1944
Creator: Goldstein, Arthur W. & Ellerbrock, Herman H., Jr.
Item Type: Refine your search to only Report
open access

Compressibility and Heating Effects on Pressure Loss and Cooling of a Baffled Cylinder Barrel

Description: "Theoretical investigations have shown that, because air is compressible, the pressure-drop requirements for cooling an air-cooled engine will be much greater at high altitudes and high speeds than at sea level and low speeds. Tests were conducted by the NACA to obtain some experimental confirmation of the effect of air compressibility on cooling and pressure loss of a baffled cylinder barrel and to evaluate various methods of analysis. The results reported in the present paper are regarded as … more
Date: July 1, 1944
Creator: Goldstein, Arthur W. & Ellerbrock, Herman H., Jr.
Item Type: Refine your search to only Report
open access

Compressibility Effects on Heat Transfer and Pressure Drop in Smooth Cylindrical Tubes

Description: "An analysis is made to simplify pressure-drop calculations for nonadiabatic and adiabatic friction flow of air in smooth cylindrical tubes when the density changes due to heat transfer and pressure drop are appreciable. Solutions of the equation of motion are obtained by the use of Reynolds' analogy between heat transfer and skin friction. Charts of the solutions are presented for making pressure-drop calculations" (p. 1).
Date: October 1944
Creator: Nielsen, Jack N.
Item Type: Refine your search to only Report
open access

Compressible potential flow with circulation about a circular cylinder

Description: Report presenting the potential function for flow, with circulation, of a compressible fluid about a circular cylinder, which is obtained in series form including terms of the order of M(exp 4) where M is the Mach number of the free stream. The equations are used to obtain pressure coefficient as a function of Mach number at a point on the surface of the cylinder for different values of circulation.
Date: January 1944
Creator: Heaslet, Max A.
Item Type: Refine your search to only Report
open access

Compressible potential flow with circulation about a circular cylinder

Description: "The potential function for flow, with circulation, of a compressible fluid about a circular cylinder is obtained in series form including terms of the orders of m(4) where m is the Mach number of the free stream. The resulting equations are used to obtain pressure coefficients as a function of Mach number at a point on the surface of the cylinder for different values of circulation. The coefficients derived are compared with the Glauert-Prandtl and Karman-Tsien approximations which are functio… more
Date: 1944
Creator: Heaslet, Max A.
Item Type: Refine your search to only Report
open access

Compression Tests of Six Curved Paper-Base Plastic Panels With Outward-Acting Normal Pressure

Description: Report presenting results of compression tests of six paper-base plastic panels with outward-acting normal pressure. All panels failed by separation of the skin, either from the rib or from the stiffeners. Results regarding the introduction of air pressure and types of failures encountered are provided.
Date: September 1944
Creator: Schuette, Evan H.; Rafel, Norman & Dobrowski, Charles V.
Item Type: Refine your search to only Report
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