UNT Libraries Government Documents Department - 41 Matching Results

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Analysis of a thermal ice-prevention system for wing leading-edge landing-light installations

Description: From Introduction: "A typical ice formation on a wing leading-edge-type light installation is shown in figure 1. Although the primary purpose of this analytic investigation was to determine the practicability of providing a landing-light thermal ice-prevention system which could be incorporated with the wing leading-edge thermal ice-prevention system of the B-17 F airplane, the analysis has been developed in a general form for future application to similar deigns. "
Date: January 1944
Creator: Hillendahl, Wesley H.
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
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
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

Compressive Strength of Corrugated-Sheet-Stiffened Panels for Consolidated XB-36 Airplane

Description: "Compression tests were made of 63 panels stiffened with corrugated sheet. The specimens were constructed from artificially aged alclad 24S-T aluminum alloy with minimum guaranteed yield strengths of 57 and 48 kips per square inch for the flat- and corrugated-sheet materials, respectively. Results of the tests are presented in charts which show the average stresses at the maximum load and at buckling of the sheet" (p. 1).
Date: January 1944
Creator: Weinberger, Robert A.; Sperry, William C. & Dobrowski, Charles V.
Item Type: Refine your search to only Report
open access

Determination of the Effect of Wing Flexibility on Lateral Maneuverability and a Comparison of Calculated Rolling Effectiveness With Flight Results

Description: Report presenting an analysis which shows that, when account is taken of sideslip and wing flexibility, the calculated rolling maneuverability of an airplane is in good agreement with the results obtained from flight tests. The method used avoids the complications of successive approximations but is nevertheless believed to be more nearly accurate than other methods based on semirigid-wing assumptions. The method is applied to a wing of tubular shell construction and the procedure is illustrate… more
Date: January 1944
Creator: Harmon, Sidney M.
Item Type: Refine your search to only Report
open access

Determination of the Stresses Produced by the Landing Impact in the Bulkheads of a Seaplane Bottom

Description: "The present report deals with the determination of the impact stresses in the bulkhead floors of a seaplane bottom. The dynamic problem is solved on the assumption of a certain elastic system, the floor being assumed as a weightless elastic beam with concentrated masses at the ends (due to the mass of the float) and with a spring which replaces the elastic action of the keel in the center. The distributed load on the floor is that due to the hydrodynamic force acting over a certain portion of … more
Date: January 1944
Creator: Darevsky, V. M.
Item Type: Refine your search to only Report
open access

Effect of Inlet-Air Temperature and Cylinder Displacement on Charge Temperature of Internal Combustion Engines

Description: Report discussing the effect of inlet-air temperature and cylinder displacement on the charge temperature of an internal-combustion engine at the end of the induction stroke. The experiment to test various types of cylinders and their results on the air temperature and pressure is described.
Date: January 1944
Creator: Sanders, Newell D. & Bolz, Ray E.
Item Type: Refine your search to only Report
open access

Effects of Heat-Capacity Lag in Gas Dynamics

Description: Report presenting an investigation of the existence of energy dissipations in gas dynamics, which must be attributed to a lag in the vibrational heat capacity of the gas, and most specifically the flow about a very small impact tube. A new method of measuring the relaxation time of gases is introduced in which the total-head defects observed with a specially shaped impact tube are compared with theoretical considerations.
Date: January 1944
Creator: Kantrowitz, Arthur
Item Type: Refine your search to only Report
open access

An Experimental Investigation of the Flow of Air in a Flat Broadening Channel

Description: "The wide use of diffusers, in various fields of technology, has resulted in several experimental projects to study the action and design of diffusers. Most of the projects dealt with steam (steam turbine nozzles). But diffusers have other applications - that is, ventilators, smoke ducts, air coolers, refrigeration, drying, and so forth. At present there is another application for diffusers in wind-tunnel design" (p. 1).
Date: January 1944
Creator: Vedernikoff, A. N.
Item Type: Refine your search to only Report
open access

High-Speed Aerodynamic Characteristics of a Four-Engine Bomber Airplane as Determined From Tests of a 0.075-Scale Model

Description: Report presenting tests of airplane models that included investigations to determine the longitudinal stability and control, effects of various constituent parts or their modification on longitudinal stability and control, critical speed, and distribution of wing load. Some of the changes made in attempts to improve longitudinal control and to increase critical speed included auxiliary control flaps on the lower surface of the wing, revision of the windshield, increase in dimensions of outboard… more
Date: January 1944
Creator: Barnes, Robert H.
Item Type: Refine your search to only Report
open access

High-Speed Aerodynamic Characteristics of a Four-Engine Transport Airplane as Determined From Tests of a 0.075-Scale Model

Description: Report presenting tests made in order to determine the differences in high-speed aerodynamic characteristics between models of a four-engine transport airplane and a similar bomber airplane. The main conclusion found is that the critical Mach number of the transport model is about 0.05 less than that of the bomber model.
Date: January 1944
Creator: Barnes, Robert H.
Item Type: Refine your search to only Report
open access

Investigation of the NACA 4-(3)(8)-045 Two-Blade Propellers at Forward Mach Numbers to 0.725 to Determine the Effects of Compressibility and Solidity on Performance

Description: From Summary: "As part of a general investigation of propellers at high forward speeds, tests of two 2-blade propellers having the NACA 4-(3)(8)-03 and NACA 4-(3)(8)-45 blade designs have been made in the Langley 8-foot high-speed tunnel through a range of blade angle from 20 degrees to 60 degrees for forward Mach numbers from 0.165 to 0.725 to establish in detail the changes in propeller characteristics due to compressibility effects. These propellers differed primarily only in blade solidity,… more
Date: January 22, 1944
Creator: Stack, John; Draley, Eugene C.; Delano, James B. & Feldman, Lewis
Item Type: Refine your search to only Report
open access

A Method for Welding Sheet Aluminum to SAE 4140 Steel

Description: Report presenting an investigation of a large variety of different metals used as an intermediate metal between aluminum and steel for the purpose of securing a good bond both from the viewpoint of strength and thermal conductivity. The principal result was that it was found possible to secure a satisfactory bond between aluminum and steel by electroplating the steel with a layer of silver of proper thickness.
Date: January 1944
Creator: Hess, W. F. & Nippes, E. F., Jr.
Item Type: Refine your search to only Report

Newsmap. Monday, January 3, 1944 : week of December 22 to December 29, 1943, 225th week of the war, 107th week of U.S. participation

Description: Front: Text describes action on various war fronts: New Britain, Air offensive, USSR, Italy, Scharnhorst, Command. Maps: Central Italy showing rivers and roads, Distance from London to the coast of France near Boulogne, Coastline of northern Scandinavia. Photographs: American 155mm gun fires on German positions at Mignano; American soldiers temporarily reside in holes on Venafro Ridge; Equipment retreating Germans used to tear up railroad tracks; Allied troops clear the torn up tracks to… more
Date: January 3, 1944
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

Newsmap. Monday, January 10, 1944 : week of December 29, 1943 to January 5, 1944, 226th week of the war, 108th week of U.S. participation

Description: Front: Text describes action on various war fronts: U.S.S.R., Southwest Pacific, Italy, Air offensive Maps: Central Italy, Rumania/Poland, New Britain Island./ Inset maps: Cassino region; Chieti region. Photographs: Delivering supplies to troops in Central Italy, Gen. Eisenhower with Sir Charles Poetal and Sir Arthur Tedder after the Tehran conference, Gen. Sir Bernard L. Montgomery, and Gen. Sir Alan Brooke inspect Nazi prisoners on the Italian front in New Zealand; Germans prepa… more
Date: January 10, 1944
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

Newsmap. Monday, January 17, 1944 : week of January 6 to January 13, 227th week of the war, 109th week of U.S. participation

Description: Front: Text describes action on various war fronts: USSR, Burma, Air war, Italy, Southwest Pacific, Yugoslavia, Jet plane. Map inset: Enemy controlled areas across the globe Photographs: Chinese workers and soldiers pack dirt for an airfield in southeastern China; WACs Capt. Elizabeth Lutze, Sheboygan, Wis., Lt. Sally Dean, Battle Creek, Mich. and Flight officer Margaret Maude, WAAF, London, pause behind a sacred cow lying in front of a bazaar in Delhi, India; U.S. engineers supervise … more
Date: January 17, 1944
Creator: [United States.] Army Service Forces. Morale Services Division.
Item Type: Refine your search to only Poster

Newsmap. Monday, January 24, 1944 : week of January 13 to January 20, 228th week of the war, 110th week of U.S. participation

Description: Front: Text describes action on various war fronts: USSR, Italy, Air war, Southwest Pacific, Burma. Map shows Allied advances during the week. Photographs: Cruiser U.S.S. Duluth shortly before being christened; Petty Officer Alex Holgate acknowledges a voice order during gunnery exercises; Bows-on view of a 10,000 ton Independence class carriers; Jungle training involving .30 caliber air-cooled machine guns; Italian refugees pass disabled American tanks; Italian battlescape near San Vitore;… more
Date: January 24, 1944
Creator: [United States.] Army Service Forces. Morale Services Division. Army Information Branch.
Item Type: Refine your search to only Poster

Newsmap. Monday, January 31, 1944 : week of January 20 to January 27, 229th week of the war, 111th week of U.S. participation

Description: Front: Text describes action on various war fronts: Italy, USSR, Pacific, Europe. Inset maps: [Central Italy] -- [USSR]. Photographs: Nazi multi-barrel rocket weapon, Mine and booby trap training, Twenty-fifth division men in a Southwest Pacific combat area, Winter flying conditions in Sicily, Propeller trip vapor trails, Revetments and flak guns, "Zebra" dazzle camouflaged PT boat, Two members of a German submarine boat, Jeri-cans. Back: Map of France. Scale: [ca 1:1,267,200] 1 map : col. … more
Date: January 31, 1944
Creator: [United States.] Army Service Forces. Morale Services Division. Army Information Branch.
Item Type: Refine your search to only Poster
open access

Note on the Interpretation of Wake-Survey Data and Its Use in the Estimation of Induced Drag Due to Irregularities

Description: "An analysis of the irregular vertical displacement of the wake from the trailing edge of a tailless airplane is presented, which shows the existence of an effective aerodynamic wing twist that causes an induced drag coefficient of 0.0004. The analysis explains most of the discrepancy between the drag determined from the momentum surveys an the drag measured on the wind-tunnel balance" (p. 1).
Date: January 1944
Creator: Katzoff, S. & Finn, Robert S.
Item Type: Refine your search to only Report
open access

On the flow of a compressible fluid by the hodograph method 1: unification and extension of present-day results

Description: From Summary: "Elementary basic solutions of the equations of motion of a compressible fluid in the hodograph variables are developed and used to provide a basis for comparison, in the form of velocity correction formulas, of corresponding compressible and incompressible flows. The known approximate results of Chaplygin, Von Karman and Tsien, Temple and Yarwood, and Prandtl and Glauert are unified by means of the analysis of the present paper. Two new types of approximations, obtained from the … more
Date: January 12, 1944
Creator: Garrick, I. E. & Kaplan, Carl
Item Type: Refine your search to only Report
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