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  • Aerodynamics  (6)
  • Inorganic Chemistry  (5)
  • GENERAL
  • 1955-1959
  • 1945-1949  (11)
  • 1947  (11)
  • 1
    Electronic Resource
    Electronic Resource
    Zur Thermochemie des Natriums (1947)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 253 (1947), S. 352-356 
    Details
    ISSN: 0372-7874
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Mit reinstem Natrium und weniger reinem [Na2O] und [Na2O2] werden dic. Lösungswärmen in Wasser neu gemessen, diejenige von [Na2O2] unter Zersetzung der Wasserstoffperoxydlösung. Es resultieren durchweg merklich höhere Zahlen, als bisher angenommen, doch ergibt sich eine genaue Diskussion der Fehlerquellen eine Unsicherheit von 3 pro Mille, während die Differenzen bis zu 4% betragen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19472530513
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Zur Chemie des Indiums. VI. Die Löslichkeit von Indium(III)-chlorid, Indium(III)-bromid und Indium(III)-jodid im Wasser bei verschiedenen Temperaturen (1947)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 254 (1947), S. 293-296 
    Details
    ISSN: 0372-7874
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Löslichkeiten des Chlorids, Bromids und Jodids des dreiwertigen Indiums in Wasser bei verschiedenen Temperaturen werden bestimmt und die zugehörigen Bodenkörper festgestellt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19472540508
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Chemie des Indiums. VII. Doppelsalze der Indium (III)-halogenide mit-den Halogeniden des Lithiums, Thalliums und Zinks (1947)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 254 (1947), S. 305-308 
    Details
    ISSN: 0372-7874
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Eine Anzahl von Doppelsalzen der Lithium-, Thallium(I)- und Zink- Halogenide rnit den gleichartigen Halogeniden des dreiwertigen Indiums wurden durch Kristallisation aus entsprechenden Lösungen bei Zimmertemperatur hergestellt und ihre Existenzbereiche durch Untersuchung der zugehörigen Mutterlaugen abgegrenzt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19472540510
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  • 4
    Electronic Resource
    Electronic Resource
    Zur Chemie des Indiums. IX. Die Thioindate des Lithiums, Natriums, Kaliums und Bariums (1947)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 254 (1947), S. 309-312 
    Details
    ISSN: 0372-7874
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Versuche zur Herstellung der Thioindate des Natriums, Kaliums, Lithiums und Bariums ergeben nur bei den drei erstgenannten Metallen reine Thioindate. Lithium bildet außerdem noch hydroxyd- und chloridhaltige Präparate und eine Verbindung zwischen Lithiumchlorid und Indium(III)-sulfid. Barium ergab nur eine hydroxydhaltige Verbindung.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19472540511
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  • 5
    Electronic Resource
    Electronic Resource
    Zur Chemie des Indiums. VII. Doppelsalze der Indiumhalogenide mit den Halogeniden der Erdalkalimetalle (1947)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 254 (1947), S. 297-304 
    Details
    ISSN: 0372-7874
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Doppelsalze der drei Indiumhalogenide InCl3, InBr3 und InJ3 mit den entsprechenden Halogeniden der Erdalkalien wurden dargestellt und die Beständigkeitsgebiete der verschiedenen Doppelsalze sowie die Bindungsfestigkeit ihres Kristallwassers untersucht.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19472540509
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  • 6
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    Investigation of Thrust Augmentation of a 1600-pound Thrust Centrifugal-flow-type Turbojet Engine by Injection of Refrigerants at Compressor Inlets (1947)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Investigations were conducted to determine effectiveness of refrigerants in increasing thrust of turbojet engines. Mixtures of water an alcohol were injected for a range of total flows up to 2.2 lb/sec. Kerosene was injected into inlets covering a range of injected flows up to approximately 30% of normal engine fuel flow. Injection of 2.0 lb/sec of water alone produced an increase in thrust of 35.8% of rate engine conditions and kerosene produced a negligible increase in thrust. Carbon dioxide increased thrust 23.5 percent.
    Keywords: Aerodynamics
    Type: NACA-RM-E7G23
    Format: application/pdf
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  • 7
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    A Comparison of the Lateral Motion Calculated for Tailless and Conventional Airplanes (1947)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Theoretical analysts of lateral dynamic motion of tailless and conventional airplanes was made for fighter and heavy transport. Their reactions to a lateral gust and control power required by each for simple maneuvers were determined and compared. Both types of airplanes require almost identical aileron control power to perform a given maneuver; tailless airplane requires about 1-2 to 1-3 directional control power of conventional airplane. Tailless airplane also shows greatest displacement for a given disturbance and has least damping in oscillatory mode.
    Keywords: Aerodynamics
    Type: NACA-TN-1154
    Format: application/pdf
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  • 8
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    Some Recent Contributions to the Study of Transition and Turbulent Boundary Layers (1947)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The first part of this paper reviews the present state of the problem of the instability of laminar boundary layers which has formed an important part of the general lectures by von Karman at the first and fourth Congresses and by Taylor at the fifth Congress. This problem may now be considered as essentially solved as the result of work completed since 1938. When the velocity fluctuations of the free-stream flow are less than 0.1 percent of the mean speed, instability occurs as described by the well-known Tollmien-Schlichting theory. The Tollmien-Schlichting waves were first observed experimentally by Schubauer and Skramstad in 1940. They devised methods of introducing controlled small disturbances and obtained measured values of frequency, damping, and wave length at various Reynolds numbers which agreed well with the theoretical results. Their experimental results were confirmed by Liepmann. Much theoretical work was done in Germany in extending the Tol1mien-Schlichting theory to other boundary conditions, in particular to flow along a porous wall to which suction is applied for removing part of the boundary layer. The second part of this paper summarizes the present state of knowledge of the mechanics of turbulent boundary layers, and of the methods now being used for fundamental studies of the turbulent fluctuations in turbulent boundary layers. A brief review is given of the semi-empirical method of approach as developed by Buri, Gruschwitz, Fediaevsky, and Kalikhman. In recent years the National Advisory.Commsittee for Aeronautics has sponsored a detailed study at the National Bureau of Standards of the turbulent fluctuations in a turbulent boundary layer under adverse pressure gradient sufficient to produce separation. The aims of this investigation and its present status are described.
    Keywords: Aerodynamics
    Type: NACA-TN-1168
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Preliminary Evaluation of the Low-Speed Stability and Control Characteristics of the McDonnell XP-85 Airplane from Tests of an Unballasted 1/5-Scale Model in the Langley Free-Flight Tunnel (1947)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: At the request of the Air Material Command, Army Air Forces an investigation of the low-speed, power-off stability and control characteristics of the McDonnell XP-85 airplane is being conducted in the Langley free-flight tunnel. The XP-85 airplane is a jet propelled, parasite fighter with a 34 deg sweepback at the wing quarter chord. It was designed to be carried in a bomb bay of the B-36 air plane. The first portion of the investigation consists of a preliminary evaluation of the stability and control characteristics of the airplane from force and fight tests of an unballasted 1/5-scale model. The second portion of the investigation consists of test of a properly balasted 1/10-scale model which will include a study of the stability of the Xp-85 when attached to the trapeze for retraction into the B-36 bomb bay. The results of the preliminary test with the 1/5-scale model are presented herein. This portion fo the investigation included tests of the model with various center fin arrangements. Both the design nose flap and a stall control vane were investigated.
    Keywords: Aerodynamics
    Type: NACA-RM-L7C27
    Format: application/pdf
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  • 10
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    Aerodynamic Characteristics of Three Deep-Stepped Planing-Tail Flying-Boat Hulls (1947)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: An investigation was made in the Langley 300 MPH 7- by 10-foot tunnel to determine the aerodynamic characteristics of three deep-stepped planing-tail flying-boat hulls differing only in the amount of step fairing. The hulls were derived by increasing the unfaired step depth of a planing-tail hull of a previous aerodynamic investigation to a depth about 92 percent of the hull beam. Tests were also made on a transverse-stepped hull with an extended afterbody for the purpose of comparison and in order to extend and verify the results of a previous investigation. The investigation indicated that the extended afterbody hull had a minimum drag coefficient about the same as a conventional hull, 0.0066, and an angle-of-attack range for minimum drag coefficient of 0.0057 which was 14 percent less than the transverse stepped hull with extended afterbody; the hulls with step fairing had up to 44 percent less minimum drag coefficient than the transverse-stepped hull, or slightly more drag than a streamlined body having approximately the same length and volume. Longitudinal and lateral instability varied little with step fairing and was about the same as a conventional hull.
    Keywords: Aerodynamics
    Type: NACA-RM-L7C18
    Format: application/pdf
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