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  • 1
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    Exploratory flight investigation of ride quality in simulated STOL environment (1972)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: A flight test experiment is described, in which various aspects of ride qualities were explored. Situations included simulated cruise and terminal area maneuvers, as might be typical of STOL transport operations. Various motion components were studied in isolation and in many combinations. The experiment included runs with and without turbulence, variations in airplane stability and handling qualities, and differences of pilot technique. The ride quality was strongly affected by roll, yaw, and heave motions; but very little by pitching. It was strongly affected by airplane stability and handling qualities and, in some cases, by piloting technique.
    Keywords: AIRCRAFT
    Type: NASA. Langley Res. Center Symp. on Vehicle Ride Quality; p 67-89
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    A 99 percent purity molecular sieve oxygen generator (1991)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Molecular sieve oxygen generating systems (MSOGS) have become the accepted method for the production of breathable oxygen on military aircraft. These systems separate oxygen for aircraft engine bleed air by application of pressure swing adsorption (PSA) technology. Oxygen is concentrated by preferential adsorption in nitrogen in a zeolite molecular sieve. However, the inability of current zeolite molecular sieves to discriminate between oxygen and argon results in an oxygen purity limitations of 93-95 percent (both oxygen and argon concentrate). The goal was to develop a new PSA process capable of exceeding the present oxygen purity limitations. A novel molecular sieve oxygen concentrator was developed which is capable of generating oxygen concentrations of up to 99.7 percent directly from air. The process is comprised of four absorbent beds, two containing a zeolite molecular sieve and two containing a carbon molecular sieve. This new process may find use in aircraft and medical breathing systems, and industrial air separation systems. The commercial potential of the process is currently being evaluated.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: NASA, Washington, Technology 2001: The Second National Technology Transfer Conference and Exposition, Volume 1; p 523-535
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Fixed-base visual simulation of obstacle avoidance during terminal descent of advanced Apollo spacecraft with an all-flexible parawing (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Fixed-base visual simulation study for ability determination of onboard pilot during landing
    Keywords: AIRCRAFT
    Type: NASA-TN-D-5940 , L-7116
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Pilot opinions of sampling effects in lateral-directional control (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Flight experiments with a microprocessor control system were conducted to determine the effects of variations in sampling parameters on several pilots' opinions of lateral-directional flying qualities. Princeton's variable-response research aircraft (VRA), which is equipped with a microprocessor based digital flight control system (Micro-DFCS), was the test vehicle. Two U.S. Navy pilots evaluated the effects of sampling rate, quantization, and pure time delay during tracking, approach, and landing. Aircraft carrier approach tasks were conducted using a Navy approach mirror. Acquisition and tracking of fixed objects on the ground provided additional information related to the Navy misson. The longitudinal controls were implemented with analog electronics, while the lateral-directional pilot inputs (stick and rudder) were fed to the Micro-DFCS, which commanded the ailerons and rudder. The conceptual relationship between the evaluation pilot's lateral-directional inputs, the flight computer, and the aircraft are illustrated.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: NASA. Ames Research Center 16th Ann. Conf. on Manual Control; p 265-270
    Format: text
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    NASA TECHNICAL REPORTS
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