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  • Aircraft Stability and Control  (5)
  • Inorganic Chemistry  (5)
  • Fisheries
  • GENERAL
  • 1955-1959  (11)
  • 1959  (11)
  • 1
    Electronic Resource
    Electronic Resource
    Über Benzal-Derivate des L-Idits (1959)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 92 (1959), S. 2694-2700 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die von E. Fischer und G. Bertrand beschriebenen Tribenzal-L-idite erwiesen sich als identisch mit 1.3;2.4;5.6-Tribenzal-L-idit. Unter wenig abgeänderten Versuchsbedingungen entsteht neben dem Tribenzal-L-idit ein Dibenzal-Derivat, welches einen 2.3.4.5-, wahrscheinlich 2.4;3.5-Dibenzal-L-idit darstellt. Es wird auf den unterschiedlichen Verlauf der Acetalisierung des L-Idits mit Benzaldehyd, bzw. Formaldehyd hingewiesen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19590921103
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  • 2
    Electronic Resource
    Electronic Resource
    Über Tris-trimethylendiamin-Komplexe des dreiwertigen Chroms (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 302 (1959), S. 1-9 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A method of preparing [Cr tn3]Cl3 (tn = NH2 · CH2 · CH2 · CH2 · NH2) by direct interaction between CrCl3 and trimethylene diamine is described. From the new compound, complex salts of the type [Cr tn3]X3 with X = Br-, J-, ClO-4, and NO-3 have been obtained.The absorption spectrum of [Cr tn3]+ is given. Attempts to isolate optical antipodes are described.
    Notes: Es wird eine Methode zur Darstellung von [Cr tn3]Cl3(tn = NH2 · CH2 · CH2 ·CH2 · NH2) in direkter Reaktion aus CrCl3 und Trimethylendiamin angegeben. Aus dem Chlorid erhält man durch Umfällen mit entsprechenden Säuren und Alkalisalzen [Cr tn3]X3 mit X = Br-, J-, ClO-4 und NO-3. Das Absorptionsspektrum von [Cr tn3]3+ wird mitgeteilt. Versuche zur Trennung in die optischen Antipoden werden beschrieben.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593020102
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  • 3
    Electronic Resource
    Electronic Resource
    Über die Bildung salzartiger Verbindungen bei der Umsetzung von Antimon(V)-chlorid mit Äthylat (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 302 (1959), S. 88-102 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On reaction of SbCl5 with NaOC2H5 salt-like compounds with cation co-ordination number 4 and anion co-ordination number 6 are formed: [SbCla(OC2H5)4-a] [SbClb(OC2H5)6-b]. In polar solvents these substances show electrolytical conductivity and their molecular weights in dilute solution prove complete dissociation into two particles. In nonpolar solvents the compounds are also dissolved but now in a molecular form SbClc(OC2H5)5-c. The latter solutions have no electrolytical conductivity. IR-spectra of the compounds in polar and nonpolar solutions are different from each other.
    Notes: Bei der Umsetzung von SbCl5 mit NaOC2H5 entstehen heteropolare Verbindungen mit 4fach koordiniertem Kation und 6fach koordiniertem Anion: [SbCla(OC2H5)4-a] [SbClb(OC2H5)6-b]. In polaren Lösungsmitteln zeigen diese Substanzen elektrolytische Leitfähigkeit und Molekulargewichte, die in verdünnter Lösung auf vollständige Dissoziation schließen lassen. In unpolaren Lösungsmitteln sind die Verbindungen in homöopolarer Form SbClc(OC2H5)5-c gelöst. Diese Lösungen zeigen nur sehr geringe Leitfähigkeit. Die Infrarotspektren der Verbindungen in polaren und unpolaren Lösungen unterscheiden sich stark voneinander.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593020109
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  • 4
    Electronic Resource
    Electronic Resource
    Complex Compounds of n-Hexyl Biguanide with metallic Elements (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 302 (1959), S. 237-240 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es werden Chelatkomplexe des n-Hexylbiguanids mit Kupfer(II), Nickel(II), Kobalt(III) und Chrom(III) beschrieben. Es konnte ferner Dipyridino-dibiguanidino-kobalt(III)-hydroxyd dargestellt werden.
    Notes: A study of n-hexyl biguanide as a chelating ligand has been made, and its complex compounds with copper(II), nickel(II), cobalt(III) and chromium(III) have been described. A cobaltic complex containing pyridine along with the biguanide, dipyridinocobaltic bis-n-hexyl biguanidinium hydroxide, has also been isolated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593020312
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  • 5
    Electronic Resource
    Electronic Resource
    Über die Hydrolyse des Antimon(V)-säureäthylesters (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 301 (1959), S. 339-342 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Sb(OC2H5)5 is hydrolized on action with ½ mol of water yielding the dimeric ester (C2H5O)4Sb—O—Sb(OC2H5)4. By larger quantities of water polymeric chains and net works are formed.
    Notes: Durch Hydrolyse von Sb(OC2H5)5 mit einem halben Mol Wasser entsteht die kondensierte Verbindung (C2H5O)4SbOSb(OC2H5)4. Größere Mengen an Wasser führen zu ketten förmigen und vernetzten Produkten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593010518
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  • 6
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    Effects of Fuselage Nose Length and a Canopy on the Low-Speed Oscillatory Yawing Derivatives of a Swept-Wing Airplane Model with a Fuselage of Circular Cross Section (1959)
    In:  CASI
    Details
    Publication Date: 2019-08-16
    Description: A wind-tunnel investigation was made at low speed in the Langley stability tunnel in order to determine the effects of fuselage nose length and a canopy on the oscillatory yawing derivatives of a complete swept-wing model configuration. The changes in nose length caused the fuselage fineness ratio to vary from 6.67 to 9.18. Data were obtained at various frequencies and amplitudes for angles of attack from 0 deg. to about 32 deg. Static lateral and longitudinal stability data are also presented.
    Keywords: Aircraft Stability and Control
    Type: NASA-MEMO-1-15-59L
    Format: application/pdf
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  • 7
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    Static Longitudinal Stability and Control Characteristics of an Unswept Wing and Unswept Horizontal-Tail Configuration at Mach Numbers from 0.70 to 2.22 (1959)
    In:  CASI
    Details
    Publication Date: 2019-08-16
    Description: Results of an investigation of the static longitudinal stability and control characteristics of an aspect-ratio-3.1, unswept wing configuration equipped with an aspect-ratio-4, unswept horizontal tail are presented without analysis for the Mach number range from 0.70 to 2.22. The hinge line of the all-movable horizontal tail was in the extended wing chord plane, 1.66 wing mean aerodynamic chords behind the reference center of moments. The ratio of the area of the exposed horizontal-tail panels to the total area of the wing was 13.3 percent and the ratio of the total areas was 19.9 percent. Data are presented at angles of attack ranging"from -6 deg to +18 deg for the horizontal tail set at angles ranging from +5 deg to -20 deg and for the tail removed.
    Keywords: Aircraft Stability and Control
    Type: NASA-MEMO-6-11-59A
    Format: application/pdf
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  • 8
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    Comparison of High-Energy Propellants in Final Stages (1959)
    In:  Other Sources
    Details
    Publication Date: 2019-08-14
    Description: No abstract available
    Keywords: GENERAL
    Type: NASA-TM-X-51006
    Format: text
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  • 9
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    The Synthesis of Optimum Homing Missile Guidance Systems with Statistical Inputs (1959)
    In:  CASI
    Details
    Publication Date: 2019-08-15
    Description: An analytical approach is presented which is applicable to the optimization of homing navigation guidance systems which are forced to operate in the presence of radar noise. The two primary objectives are to establish theoretical minimum miss distance performance and a method of synthesizing the optimum control system. The factors considered are: (1) target evasive maneuver, (2) radar glint noise, (3) missile maneuverability, and (4) the inherent time-varying character of the kinematics. Two aspects of the problem are considered. In the first, consideration is given only to minimization of the miss distance. The solution given cannot be achieved in practice because the required accelerations are too large. In the second, results are extended to the practical case where the limited acceleration capabilities of the missile are considered by placing a realistic restriction on the mean-square acceleration so that system operation is confined to the linear range. Although the exact analytical solution of the latter problem does not appear feasible, approximate solutions utilizing time-varying control systems can be found. One of these solutions - a range multiplication type control system - is studied in detail. It is shown that the minimum obtainable miss distance with a realistic restriction on acceleration is close to the absolute minimum for unlimited missile maneuverability. Furthermore, it is shown that there is an equivalence in performance between the homing and beam-rider type guidance systems. Consideration is given to the effect of changes in target acceleration, noise magnitude, and missile acceleration on the minimum miss distance.
    Keywords: Aircraft Stability and Control
    Type: NASA-MEMO-2-13-59A
    Format: application/pdf
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  • 10
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    A Wind-Tunnel Investigation of the Stall-Flutter Characteristics of a Supersonic-Type Propeller at Positive and Negative Thrust (1959)
    In:  CASI
    Details
    Publication Date: 2019-08-16
    Description: An investigation has been made utilizing a three-blade, 10-foot- diameter, supersonic-ty-pe propeller to determine propeller flutter characteristics. The particular flutter characteristics of interest were (1) the effect of stall flutter on a propeller operating in positive and negative thrust, (2) the effect of stall flutter on a propeller operating with the thrust axis inclined, and (3) the variation of vibratory blade shear stresses as the stall flutter boundary is penetrated and exceeded. Thrust and power measurements were made for all test conditions. Wake and inflow surveys were made when appropriate, to define the thrust and torque distributions and the magnitude of the inflow velocity. Stress measurements were made simultaneously to obtain the propeller flutter and bending response. It was found when operating both in the positive and negative thrust regions that, for most cases after the onset of flutter, the magnitude of the flutter stresses at first increased rapidly with section blade angle P, after which further increases in 0 resulted in only a moderate increase or a reduction in stress. Thrust-axis inclination up to the limit of the tests (angle of attack of 15 deg and dynamic pressure of 40 psf) appeared to have no effect on stall flutter. The stall flutter stresses were found to be directly associated with the section thrust characteristics of the blades. The onset of flutter was found to occur simultaneously with the divergence of the section thrust variation with blade angle from linearity for stations outboard of the blade 0.8-radius station. The maximum flutter stresses appeared to be a function of the maximum section thrust obtained at or in the vicinity of the blade 0.8-radius station. In an attempt to correlate two-dimensional airfoil data with three-dimensional data to predict the stall angle of attack (divergence of the section thrust) of the blade sections, it was found that no consistent correlation could be obtained. Also, a knowledge of the inflow conditions appeared to be insufficient to account for differences in airfoil characteristics between the two-dimensional and the three-dimensional cases.
    Keywords: Aircraft Stability and Control
    Type: NASA-MEMO-3-9-59A
    Format: application/pdf
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