Resource Type
Partner
Collection
Technical Report Archive and Image Library
416
National Advisory Committee for Aeronautics Collection
334
TRAIL Microcard Collection
45
Office of Scientific & Technical Information Technical Reports
39
Abilene Library Consortium
9
National WASP WWII Museum
9
Harris and Eliza Kempner
6
World War Two Collection
4
Texas State Publications
3
Dr. Chauncey Depew Leake
2
6 More
Serial/Series Title
NACA Wartime Reports
243
NACA Advanced Restricted Reports
119
NACA Memorandum Reports
48
NACA Technical Notes
44
Atomic Energy Commission Reports
37
NACA Advanced Confidential Reports
33
NACA Restricted Bulletins
27
NACA Technical Reports
24
United States Bureau of Mines Reports
23
NACA Technical Memorandums
17
38 More
States
Results:
1 - 24 of
482
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Additional design charts relating to the stalling of tapered wings
From Introduction: "The present report, therefore, may be considered a supplement to reference 1. The combined scope of the stall charts of reference 1, designated A, and of the present work, designated B, is summarized in the following table: For the wing with root thickness ratio to 18 was also investigated.
Date:
January 1943
Creator:
Harmon, Sidney M.
System:
The UNT Digital Library
Adsorbent Clays: Their Distribution, Properties, Production, and Uses
From Abstract: "This bulletin is a summary of present knowledge of the adsorbent or bleaching clays-their distribution, field and laboratory identification, physical and chemical properties, uses, quality, and value. Problems in the drying, treating with acids, and washing are discussed, and methods of testing and rating decolorizing efficiency are described."
Date:
1943
Creator:
Nutting, P. G.
System:
The UNT Digital Library
Aerodynamic and hydrodynamic tests of a family of models of flying hulls derived from a streamline body -- NACA model 84 series
Report discussing a series of related forms of flying-boat hulls representing various degrees of compromise between aerodynamic and hydrodynamic requirements was tested in Langley Tank No. 1 and in the Langley 8-foot high-speed tunnel. The purpose of the investigation was to provide information regarding the penalties in water performance resulting from further aerodynamic refinement and, as a corollary, to provide information regarding the penalties in range or payload resulting from the retention of certain desirable hydrodynamic characteristics. The information should form a basis for over-all improvements in hull form.
Date:
1943
Creator:
Parkinson, John B.; Olson, Roland E.; Draley, Eugene C. & Luoma, Arvo A.
System:
The UNT Digital Library
Aerodynamic characteristics and flap loads of perforated double split flaps on a rectangular NACA 23012 airfoil
From Introduction: "The results of the load tests and some additional aerodynamic characteristics of perforated double split flaps on a rectangular NACA 23012 airfoil are given in the present report."
Date:
January 1943
Creator:
Turner, Thomas R.
System:
The UNT Digital Library
Altitude Rating of Electrical Apparatus
"This paper studies the effect of altitude on the ratings of rotating electric machines and after determining the fundamental principles involved, discusses these in relation to the application of such machines in modern aircraft" (p. 1).
Date:
January 1943
Creator:
Lebenbaum, Paul, Jr.
System:
The UNT Digital Library
The Analysis of Strains Indicated by Multiple-Strand Resistance-Type Wire Strain Gages Used as Rosettes
"Methods are given for making the necessary corrections to the strains indicated by multiple-strand resistance-type wire strain gages used singly or as rosettes to measure strains at an angle to the principal strain. The results of tests to determine the validity of the methods of correction are reported" (p. 1).
Date:
January 1943
Creator:
Dow, Norris F.
System:
The UNT Digital Library
AWVS Public Relations Department Monthly Report: January 1943
Monthly report from the Public Relations Department to the National Board of Directors for the American Women's Voluntary Services discussing their news and activities including being recognized as the top war-time volunteer organization. The report provides updates on public campaigns and program releases.
Date:
January 1943
Creator:
American Women's Voluntary Services. Public Relations Department.
System:
The Portal to Texas History
Chain Reaction of Pure Fissionable Materials in Solution
The critical mass of 94-239 and the corresponding critical dimensions of homogeneous mixtures of 94-239 with various moderating media been calculated as a function of the concentration of 94. A simple transformation makes the figures applicated to92-235. the results are in essential agreement with the preliminary estimated made independently by Oppenheimer and Serber. The problem of the stability of a chain reaction in solution and questions of protection are discussed.
Date:
January 1, 1943
Creator:
Christy, Robert F., 1916-2012 & Wheeler, John Archibald, 1911-2008
System:
The UNT Digital Library
Comparison of various methods for computing drag from wake surveys
"The various equations for computing profile drag by the momentum method are examined, and the errors arising from complete or partial neglect of compressibility effects in the Jones equation and the Bicknell equation are evaluated. The integrating method of Silverstein and Katzoff is shown to be accurate over a wide range of Mach number and wake shapes" (p. 1).
Date:
January 1943
Creator:
Davis, Wallace F.
System:
The UNT Digital Library
The Coso Quicksilver District, Inyo County, California
From abstract: The Coso quicksilver district, which is in the Coso Range, Inyo County, Calif., produced 231 flasks of quicksilver between 1935 and 1939. The quicksilver mineral, cinnabar, was not recognized in the district until 1929, although the hot springs near the deposits have been known since about 1875...The granitic rock on which much of the sinter rests is considerably altered. The cinnabar was deposited as films and grains in open spaces in the sinter, during one stage in a sequence of hot spring activities that still continues. The amount of sinter in the district is estimated to be about 1,800,000 tons. Although the greater part of this does not contain much cinnabar, the total quantity of such material is large enough to be of interest as a low-grade ore.
Date:
1943
Creator:
Ross, Clyde P. & Yates, Robert G.
System:
The UNT Digital Library
Derivation of charts for determining the horizontal tail load variation with any elevator motion
Report presenting equations relating the wing and tail loads are derived for a unit elevator displacement. The equations are converted into a nondimensoinal form and charts are given that can be used to predict wing- and tail-load-increment variation for any type of elevator motion and for degrees of airplane stability.
Date:
January 1943
Creator:
Pearson, Henry A.
System:
The UNT Digital Library
Drag Measurements of a Protruding.50-Caliber Machine Gun with Barrel Jacket Removed
Tests were made in 8-ft high-speed wind tunnel to determine the drag reduction possible by eliminating the barrel jacket of a protruding 50-caliber aircraft gun. It was found that the drag of a standard aircraft gun protruding into the air stream at right angles to the flow can be reduced by 23% by discarding the barrel jacket. At 300 mph and sea-level conditions, this amounts to a decrease in drag of from 83 to 64 pounds. A rough surface finish on the barrel was found to have no adverse effects on the drag of the barrel, the drag being actually less at high Mach Numbers.
Date:
January 1943
Creator:
Luoma, Arvo A.
System:
The UNT Digital Library
The Effect of Compressibility on the Growth of the Laminar Boundary Layer on Low-Drag Wings and Bodies
The development of the laminar boundary layer in a compressible fluid is considered. Formulas are given for determining the boundary-layer thickness and the ratio of the boundary-layer Reynolds number to the body Reynolds number for airfoils and bodies of revolution. It is shown that the effect of compressibility will profoundly alter the Reynolds number corresponding to the upper limit of the range of the low-drag coefficients.
Date:
January 1943
Creator:
Allen, H. Julian & Nitzberg, Gerald E.
System:
The UNT Digital Library
Effect of Fillers and of Mixing Procedure on the Strength of Plastic Materials
Note presenting a study to prepare a series of molding powders with the use of a given plastic and given fillers in varying proportions and to determine the effect of the differences in composition of the molding powders on certain physical properties of standard test pieces molded from them.
Date:
January 1943
Creator:
Kynoch, William & Patronsky, L. A.
System:
The UNT Digital Library
Effect of Normal Pressure on the Critical Shear Stress of Curved Sheet
"In order to determine the critical stresses caused by an outward acting pressure on the upper surface of a wing due to the difference in internal and external pressures, torsional tests were made on two curved-sheet specimens subjected to an outward acting normal pressure. Results show that an outward acting normal pressure appreciable raises the critical shear stress for an unstiffened curved sheet; the absolute increase in critical shear stress is slightly greater for a 30 in. rib spacing than for a 10 in. rib spacing" (p. 1).
Date:
January 1943
Creator:
Rafel, Norman
System:
The UNT Digital Library
Effect of Rivet Holes on the Ultimate Strength Developed by 24S-T and Alclad 75S-T Sheet in Incomplete Diagonal Tension
Strength tests were made of a number of 24S-T and Alclad 75S-T aluminum-alloy shear webs to determine the effect of rivet or bolt holes on the shear strength. Data were obtained for webs which approached a condition of pure shear stress as well as for webs with well-developed diagonal tension. The rivet factor, (pitch minus diameter) divided by pitch, was varied from approximately 0.81 to 0.62. These tests indicated that the shear stresses on the gross section were nearly constant for all values of the rivet factor investigated if the other properties of the web were not changed.
Date:
1943
Creator:
Levin, L. Ross & Nelson, David H.
System:
The UNT Digital Library
The Effect on Stability and Control of a Pusher Propeller Behind Conventional Tail Surfaces as Determined by Tests of a Powered Model in the Free-Flight Tunnel
Report presenting an investigation of the effects on stability and control of a pusher propeller behind conventional horizontal and vertical tail surfaces in the free-flight tunnel by tests of a scale model of a submerged-engine pusher airplane. The investigation consisted of flight and balance tests at windmilling and high-power conditions with a partial-span Zap extensible flap extended and retracted. Results regarding the longitudinal stability, longitudinal control, stalling characteristics, lateral stability, and lateral control are provided.
Date:
January 1943
Creator:
Campbell, John P. & Hollingworth, Thomas A.
System:
The UNT Digital Library
An experimental survey of flow across banks of elliptical and pointed tubes
Report presenting an experimental survey of the details of the flow of fluids across banks of streamline tubes as a continuation of previous work. Information that clarifies the picture of flow has been obtained by surveys of total, dynamic, and static pressure, and hot-wire cooling surveys of the unheated tubes.
Date:
January 1943
Creator:
Joyner, Upshur T. & Palmer, Carl B.
System:
The UNT Digital Library
FCC Reports, Volume 8, March 1, 1940 to August 1, 1941
Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date:
1943
Creator:
United States. Federal Communications Commission.
System:
The UNT Digital Library
FCC Reports, Volume 9, August 1, 1941 to April, 1943
Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission. Appendix begins on page 353.
Date:
1943
Creator:
United States. Federal Communications Commission.
System:
The UNT Digital Library
Flight Investigation of NACA D(Sub S) Cowlings on the XP-42 Airplane 1: High-Inlet-Velocity Cowling with Propeller Cuffs Tested in High-Speed Level Flight
Report presenting results from a series of flight tests of the maximum speed and cooling characteristics in full-throttle level flight of the XP-42 airplane equipped with a short-nose high-inlet velocity cowling. The results of the tests indicated a maximum speed of 336 miles per hour at 960 horsepower at 25,000 feet. Results regarding maximum speed and pressure and temperatures are provided.
Date:
January 1943
Creator:
Bailey, F. J., Jr.
System:
The UNT Digital Library
Flight investigation of NACA D(sub S) cowlings on the XP-42 airplane 2: low-inlet-velocity cowling with axial-flow fan and propeller cuffs
Report presenting results from a series of flight tests of the performance and cooling characteristics in high-speed level flight and in climb of the XP-42 airplane equipped with a short-nose low-inlet-velocity cowling and an axial-flow fan mounted on the spinner. Results regarding maximum speed and pressures and temperatures are provided.
Date:
January 1943
Creator:
Johnston, J. Ford & Voglewede, T. J.
System:
The UNT Digital Library
Flight investigation of NACA D(sub S) cowlings on the XP-42 airplane 3: low-inlet-velocity cowling without fan or propeller cuffs, with axial-flow fan alone, and with two different sets of propeller cuffs
Report presenting the results of flight measurements of performance and cooling characteristics of the XP-42 airplane equipped with a short-nose low-inlet-velocity cowling. Testing included measurements in level flight and climb of the effects of a spinner-mounted axial-flow fan without propeller cuffs, no fan or cuffs, and two different sets of propeller cuffs.
Date:
January 1943
Creator:
Johnston, J. Ford & Voglewede, T. J.
System:
The UNT Digital Library
Flight investigation of NACA D(sub S) cowlings on the XP-42 airplane 4: high-inlet-velocity cowling tested in climb with and without propeller cuffs and in high-speed level flight without propeller cuffs
Report presenting flight measurements of the performance and cooling characteristics of a short-nose high-inlet-velocity cowling on the XP-42 for conditions of climb with and without propeller cuffs and for high speed without cuffs. The speed of the airplane was approximately 1 mile per hour greater without propeller cuffs than the previously measured value with cuffs. Results regarding maximum speed, pressures and temperatures, and ground cooling are provided.
Date:
January 1943
Creator:
Johnston, J. Ford & Voglewede, T. J.
System:
The UNT Digital Library