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  • Books
  • Other Sources  (5)
  • 1950-1954  (5)
  • 1951  (5)
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  • 1950-1954  (5)
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  • 1
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    A Simplified Instrument for Recording and Indicating Frequency and Intensity of Icing Conditions Encountered in Flight (1951)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An instrument for recording and indicating the frequency and intensity of aircraft icing conditions encountered in flight has been developed by the NACA Lewis Laboratory to obtain statistical icing data over world-wide air routes during routine airline operations. The operation of the instrument is based on the creation of a differential pressure between an ice-free total-pressure system and a total-pressure system in which small total-pressure holes vented to static pressure are allowed to plug with ice accretion. The simplicity of this operating principle permits automatic operation, and provides relative freedom from maintenance and operating problems. The complete unit weighing only 18 pounds records icing rate, airspeed, and altitude on photographic film and provides visual indications of icing intensity to the pilot.
    Type: NACA-RM-E51E16
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Flight Camera for Photographing Cloud Droplets in Natural Suspension in the Atmosphere (1951)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A camera designed for use in flight has been developed by the NACA Lewis laboratory t o photograph cloud droplets in their natural suspension in the atmosphere. A magnification of 32 times is employed to distinguish for measurement purposes all sizes of droplets greater than 5 microns in diameter. Photographs can be taken at flight speeds up to 150 miles per hour at 5-second intervals, A field area of 0.025 square inch is photographed on 7-inch-width roll film accommodating 40 exposures on an 18-foot length. Flight tests conducted in cumulus clouds have shown that approximate droplet-size distribution studies can be obtained and that a studies of the microstructure and physics of clouds can be made with the camera.
    Keywords: Meteorology and Climatology
    Type: NACA-RM-E50K01a
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Flight investigation of a mechanical feel device in an irreversible elevator control system of a large airplane (1951)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Type: NACA-TN-2496
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Analysis of Meteorological Data Obtained During Flight in a Supercooled Stratiform Cloud of High Liquid-Water Content (1951)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Flight icing-rate data obtained in a dense and. abnormally deep supercooled stratiform cloud system indicated the existence of liquid-water contents generally exceeding values in amount and extent previously reported over the midwestern sections of the United States. Additional information obtained during descent through a part of the cloud system indicated liquid-water contents that significantly exceeded theoretical values, especially near the middle of the cloud layer.. The growth of cloud droplets to sizes that resulted in sedimentation from the upper portions of the cloud is considered to be a possible cause of the high water contents near the center of the cloud layer. Flight measurements of the vertical temperature distribution in the cloud layer indicated a rate of change of temperature with altitude exceeding that of the moist adiabatic lapse rate. This excessive rate of change is considered to have contributed to the severity of the condition.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NACA-RM-E51D18
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Flight Instrument for Measurement of Liquid-Water Content in Clouds at Temperatures Above and Below Freezing (1951)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A principle formerly used in an instrument for cloud detection was further investigated to provide a simple and rapid means for measuring the liquid-water content of clouds at temperatures above and below freezing. The instrument consists of a small cylindrical element so operated at high surface temperatures that the impingement of cloud droplets creates a significant drop in the surface temperature. ? The instrument is sensitive to a wide range of liquid-water content and was calibrated at one set of fixed conditions against rotating multicylinder measurements. The limited conditions of the calibration Included an air temperature of 20 F, an air velocity of 175 miles per hour, and a surface temperature in clear air of 475 F. The results obtained from experiments conducted with the instrument indicate that the principle can be used for measurements in clouds at temperatures above and below freezing. Calibrations for ranges of airspeed, air temperature, and air density will be necessary to adapt the Instrument for general flight use.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NACA-RM-E50J12A
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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