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  • AIRCRAFT DESIGN, TESTING AND PERFORMANCE  (42)
  • Biology
  • General Chemistry
  • 1975-1979  (60)
  • 1955-1959  (9)
  • 1975  (60)
  • 1958  (9)
  • 1
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    Full-scale upper-surface-blown flap noise (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A highly noise-suppressed TF 34 engine was used to investigate the noise of several powered lift configurations involving upper-surface-blown (USB) flaps. The configuration variables were nozzle type (i.e. slot and circular with deflector), flap chord-length, and flap angle. The results of velocity surveys at both the nozzle exit and the flap trailing edge are used for correlation of the noise data. Configurations using a long flap design were 4 dB quieter than a short flap typical of current trends in USB flap design. The lower noise for the long flap is attributed primarily to the greater velocity decay of the jet at the flap trailing edge. The full-scale data revealed substantially more quadrupole noise in the region near the deflected jet than observed in previous sub-scale tests.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: SAE PAPER 750609 , Society of Automotive Engineers, Air Transportation Meeting; May 06, 1975 - May 08, 1975; Hartford, CT
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Flight test investigation of the vortex wake characteristics behind a Boeing 727 during two-segment and normal ILS approaches (A joint NASA/FAA report) (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Flight tests were performed to evaluate the vortex wake characteristics of a Boeing 727 aircraft during conventional and two-segment instrument landing approaches. Smoke generators were used for vortex marking. The vortex was intentionally intercepted by a Lear Jet and a Piper Comanche aircraft. The vortex location during landing approach was measured using a system of phototheodolites. The tests showed that at a given separation distance there are no readily apparent differences in the upsets resulting from deliberate vortex encounters during the two types of approaches. The effect of the aircraft configuration on the extent and severity of the vortices is discussed.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-TM-X-62398 , FAA-NA-75-151
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Conceptual design of reduced energy transports (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This paper reports the results of a conceptual design study of new, near-term fuel-conservative aircraft. A parametric study was made to determine the effects of cruise Mach number and fuel cost on the 'optimum' configuration characteristics and on economic performance. Supercritical wing technology and advanced engine cycles were assumed. For each design, the wing geometry was optimized to give maximum return on investment at a particular fuel cost. Based on the results of the parametric study, a reduced energy configuration was selected. Compared with existing transport designs, the reduced energy design has a higher aspect ratio wing with lower sweep, and cruises at a lower Mach number. It yields about 30% more seat-miles/gal than current wide-body aircraft. At the higher fuel costs anticipated in the future, the reduced energy design has about the same economic performance as existing designs.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 75-303 , American Institute of Aeronautics and Astronautics, Annual Meeting and Technical Display; Feb 24, 1975 - Feb 26, 1975; Washington, DC
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Display/control requirements for VTOL aircraft (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Quantative metrics were determined for system control performance, workload for control, monitoring performance, and workload for monitoring. Pilot tasks were allocated for navigation and guidance of automated commercial V/STOL aircraft in all weather conditions using an optimal control model of the human operator to determine display elements and design.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-CR-145026 , ASI-TR-75-26
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Simultaneous calculation of aircraft design loads and structural member sizes (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A design process which accounts for the interaction between aerodynamic loads and changes in member sizes during sizing of aircraft structures is described. A simultaneous iteration procedure is used wherein both design loads and member sizes are updated during each cycle yielding converged, compatible loads and member sizes. A description is also given of a system of programs which incorporates this process using lifting surface theory to calculate aerodynamic pressure distributions, using a finite-element method for structural analysis, and using a fully stressed design technique to size structural members. This system is tailored to perform the entire process with computational efficiency in a single computer run so that it can be used effectively during preliminary design. Selected results, considering maneuver, taxi, and fatigue design conditions, are presented to illustrate convergence characteristics of this iterative procedure.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 75-965 , American Institute of Aeronautics and Astronautics, Aircraft Systems and Technology Meeting; Aug 04, 1975 - Aug 07, 1975; Los Angeles, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
    Electronic Resource
    Electronic Resource
    Stereochemische Betrachtungen über Reaktionen alkaliorganischer Verbindungen (1958)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 70 (1958), S. 151-154 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurden die stereochemischen Daten von Reaktionen alkali-organischer Verbindungen mit Alkylhalogeniden und äthern gesammelt, um aus ihnen Näheres über die Reaktionsabläufe zu erfahren. Die Bildung der recht verschiedenen Reaktionsprodukte läßt sich verstehen, wenn man die Umsetzungen in jeweils eine Kupplungs-, Austausch- und Eliminierungsreaktion aufteilt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19580700603
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Frage der Bindungsverhältnisse bei Komplexverbindungen (1958)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 70 (1958), S. 155-163 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird untersucht, in wie weit auf Grund der Ergebnisse physikalischer oder chemischer Untersuchungen eine Aussage über den Bindungszustand von Komplexverbindungen zulässig ist. Dabei werden besonders die Konsequenzen, die sich aus dem elektrostatischen Modell der Komplexionen bezüglich der optischen und magnetischen Eigenschaften ergeben, dargelegt. Die Bedeutung des Variationsprinzips der Quantentheorie für die Diskussion von Bindungsproblemen wird erläutert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19580700604
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  • 8
    Electronic Resource
    Electronic Resource
    Handbook of Chemistry and Physics, herausgegeben von Ch. D. Hodgman. Chemical Rubber Publishing Co., Cleveland, Ohio (USA) 1957/58 39. Aufl., 3212 S., DM 53. -  Alleinige Auslieferung für Deutschland; Verlag Chemie GmbH., Abtlg. Sortiment, Weinheim/Bergstr. (1958)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 70 (1958), S. 172-172 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19580700617
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  • 9
    Electronic Resource
    Electronic Resource
    Gaschromatographie (1958)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 70 (1958), S. 42-50 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird ein Überblick über die Entwicklung der Gaschromatographie sowie eine Beschreibung des Prinzips und der experimentellen Methodik gegeben. Die für ein Chromatogramm charakteristischen Größen  -  wie Durchbruchszeit, Verzögerungszeit, Verweilzeit, Halbwertsbreite, Rf-Wert und Retentionsvolumen  -  werden sowohl nach der kinetischen wie nach der thermodynamischen Betrachtungsweise eingeführt. Die Beziehungen dieser Größen zueinander sowie zu den als Maß der Trennschärfe oder Güte der Säule benutzten Größen werden dargetan. Neuere Experimente der Autoren betreffen die Trennung der Gase Sauerstoff und Stickstoff, die Bestimmung der Adsorptionswärmen der Edelgase an Aktivkohle und die Testung von Katalysatoroberflächen.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19580700203
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  • 10
    Electronic Resource
    Electronic Resource
    Übergangsmetall-katalysierte Acetylen-Cyclisierungen: Allgemeine Synthese von Indanen und TetralinenZuerst beim Am. Chem. Soc. 30th Annual Northwest Regional Meeting (Honolulu, Hawaii, 12. und 13. Juli 1975) vorgetragen. (1975)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 87 (1975), S. 744-745 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19750872010
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    Paper (German National Licenses)
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