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  • 1
    Publication Date: 2019-06-27
    Description: The Langley Research Center uses radio-controlled, scaled aircraft models to study the spin-entry characteristics of aircraft. Recent spin-entry studies required the use of an electronic proportional-control system for manipulating model control surfaces. In order to meet control system requirements, a special-purpose analog computer was designed to simulate the coupling between roll and pitch controls. A digital encoder was designed to encode the voltage analogs of control-surface position into a special pulse format for transmission to the model. This paper describes the two special developments and their relationship to the functions of the overall control system.
    Keywords: ELECTRONIC EQUIPMENT
    Type: NASA-TN-D-7361 , L-9076
    Format: application/pdf
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  • 2
    Publication Date: 2019-06-27
    Description: A flight instrumentation system for the acquisition of atmospheric turbulence data is described. Airflow direction transducers and an impact pressure transducer are the primary instruments for measuring vertical and lateral gust velocity, and a sensitive incremental pressure transducer is used to measure longitudinal gust velocity. Airplane motions, sensed by an inertial platform, are subtracted from the primary measurements during postflight data reduction to yield true gust velocity time histories. Salient engineering features of the instrumentation are discussed, and a complete description of the instrumentation is presented.
    Keywords: AIRCRAFT INSTRUMENTATION
    Type: NASA-TN-D-8314 , L-10596
    Format: application/pdf
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  • 3
    Publication Date: 2019-06-27
    Description: Navigation-aids identification decoder and display device for general aviation aircraft
    Keywords: ELECTRONIC EQUIPMENT
    Type: NASA-TN-D-5445
    Format: application/pdf
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  • 4
    Publication Date: 2019-06-27
    Description: Annotated bibliography of computer-aided circuit analysis and design
    Keywords: ELECTRONICS
    Type: NASA-SP-7023
    Format: application/pdf
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  • 5
    Publication Date: 2019-06-27
    Description: Instrument, designed for mounting in aircraft instrument panels, decodes identification signals received in Morse from VOR or ILS transmitters as they are received and displays the literal equivalent. Without elaboration it cannot decode numbers.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-10222
    Format: application/pdf
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  • 6
    Publication Date: 2019-06-27
    Description: System consists of accelerometer, indicator, and necessary electronic circuits for summing and averaging accelerations. Averaging-time feature enables pilot to see large values of accelerations over a short time or smaller accelerations over longer period of time.
    Keywords: PHYSICAL SCIENCES
    Type: LAR-11833
    Format: application/pdf
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  • 7
    Publication Date: 2019-07-13
    Description: The outcome is documented of a Flight-Critical Digital Systems Technology Workshop held at NASA-Langley December 13 to 15 1988. The purpose of the workshop was to elicit the aerospace industry's view of the issues which must be addressed for the practical realization of flight-critical digital systems. The workshop was divided into three parts: an overview session; three half-day meetings of seven working groups addressing aeronautical and space requirements, system design for validation, failure modes, system modeling, reliable software, and flight test; and a half-day summary of the research issues presented by the working group chairmen. Issues that generated the most consensus across the workshop were: (1) the lack of effective design and validation methods with support tools to enable engineering of highly-integrated, flight-critical digital systems, and (2) the lack of high quality laboratory and field data on system failures especially due to electromagnetic environment (EME).
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-CP-10028 , REPT-412U-3181-29 , NAS 1.55:10028 , Dec 13, 1988 - Dec 15, 1988; Hampton, VA; United States
    Format: application/pdf
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