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  • 2015-2019
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  • 1
    facet.materialart.
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    Analytical and Experimental Investigation of Inlet-engine Matching for Turbojet-powered Aircraft at Mach Numbers up to 2.0 (1952)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: An analysis of inlet-turbojet-engine matching for a range of Mach numbers up to 2.0 indicates large performance penalties when fixed-geometry inlets are used. Use of variable-geometry inlets, however, nearly eliminates th The analysis was confirmed experimentally by investigating at Mach numbers of 0, 0.63, and 1.5 to 2.0 two single oblique-shock-type inlets of different compression-ramp angles, which simulated a variable-geometry configuration. The experimental investigation indicated that total-pressure recoveries comparable withose attainable with well designed nose inlets were obtained with the side inlets when all the boundary layer ahead of the inlets was removed. Serious drag penalties resulted at a Mach number of 2.0 from the use of blunt-cowl leading edges. However, sharp-lip inlets produced large losses in thrust for the take-off condition. These thrust penalties which are associated with the the low-speed operation of the sharp-lip inlet designs can probably be avoided without impairing the supersonic performance of the inlet by the use of auxiliary inlets or blow-in doors.
    Materialart: NACA-RM-E51K20
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 2
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    Aerodynamic Characteristics of NACA RM-10 Missile in 8- by 6-foot Supersonic Wind Tunnel at Mach Numbers from 1.49 to 1.98 II : Presentation and Analysis of Force Measurements (1950)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Experimental investigation of aerodynamic forces acting on body of revolution (NACA RM-10 missile) with and without stabilizing fins was conducted at Mach numbers from 1.49 to 1.98 at angles of attack from 0 to 9 degrees and at Reynolds number of approximately 30,000,000. Comparison of experimental lift, drag, and pitching-moment coefficients and center of pressure location for body alone is made with linearized potential theory and a semiempirical method. Results indicate that aerodynamic characteristics were predicted more accurately by semiempirical method than by potential theory. Breakdown of measured drag coefficients into components of friction, pressure, and base-pressure drag is presented for body alone at zero angle of attack.
    Materialart: NACA-RM-E50D28
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 3
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    Investigation of Interaction Effects Arising from Side-wall Boundary Layers in Supersonic Wind-tunnel Tests of Airfoils (1948)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Materialart: NACA-RM-L8G27
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 4
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    CTAS data analysis program (1994)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The analysis program (AN) is specifically designed to produce graphic and tabular information to aid in the design and checkout of the Center TRACON Automation System (CTAS). To best reveal CTAS operation and possible problems, data are plotted in many different ways both in detail and summary form. AN has been designed to analyze both radar surveillance data and output data from CTAS. AN has been extensively used to debug and refine CTAS. It is also being used in the field to monitor and assess CTAS performance. AN is continuously refined to keep up with changing needs. The present version of AN grew out of analysis of Denver Center data. However, the AN software has been written to be adaptable to any other facility Center or TRACON. Presently, one can select Denver Stapleton, Denver International, Dallas/Fort Worth International Airport, and Dallas Love Field.
    Schlagwort(e): AIR TRANSPORTATION AND SAFETY
    Materialart: NASA-TM-108842 , A-94121 , NAS 1.15:108842
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 5
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    Tests of a Full-scale Horizontal Tail Surface in the Langley 16-foot High-speed Tunnel (1946)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Materialart: NACA-TN-1074
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 6
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    Handbook of cleaning requirements, procedures, and verification techniques for oxygen systems (1973)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Oxygen system cleaning specifications have been drawn from twenty-three government and industrial sources. Cleaning processes for meeting these specifications and recommended postcleaning inspection procedures are compiled in handbook. Microfiche supplement of pertinent pages of listed references is included.
    Schlagwort(e): MATERIALS
    Materialart: LEW-11963
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 7
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    Scatter factor and reliability of aircraft structures (1972)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The concept of time to first failure is utilized to perform a parameter study of scatter factors of aircraft structures. The Weibull distribution is used for estimation of characteristic and certifiable lives. Scatter factors for various Weibull-shaped parameters, fleet sizes and level of reliabilities are calculated. It is concluded that the currently used range of scatter factors (2 through 4) is too narrow for the estimation of a safe life and that a safe and economical design for structural materials with shape parameters less than 2 does not seem feasible except for very small fleet sizes and low levels of reliability.
    Schlagwort(e): STRUCTURAL MECHANICS
    Materialart: NASA-CR-2100
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 8
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    ASRDI Oxygen Technology Survey. Volume 2: Cleaning Requirements, Procedures, and Verification Techniques (1972)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The oxygen system cleaning specifications drawn from 23 industrial and government sources are presented along with cleaning processes employed for meeting these specifications, and recommended postcleaning inspection procedures for establishing the cleanliness achieved. Areas of agreement and difference in the specifications, procedures, and inspection are examined. Also, the lack of clarity or specificity will be discussed. This absence of clarity represents potential safety hazards due to misinterpretation. It can result in exorbitant expenditures of time and money in satisfying unnecessary requirements.
    Schlagwort(e): BIOTECHNOLOGY
    Materialart: NASA-SP-3072
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 9
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    Arrival of Fucus evanescens (Phaeophyceae) in Kiel Bight (Western Baltic) (1994)
    de Gruyter
    In:  Botanica Marina, 37 . pp. 471-477.
    Details
    Publikationsdatum: 2018-06-15
    Beschreibung: Fucus evanescens is recorded for the first time in Kiel Bight (western Baltic). It is now common at several sites in the lower zone of F. vesiculosus. Its arrival to the area and especially its increase in abundance seem to be recent. Epiphyte load in late spring was significantly higher on F. vesiculosus (20%) than on F. evanescens (5%). The immigration of F. evanescens from Danish waters may be connected to the decline in abundance of F. vesiculosus and F. serratus in the western Baltic.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OCEANREP)
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