POWERED-LIFT AIRCRAFT HANDLING QUALITIES IN THE PRESENCE OF NATURALLY-OCCURRING AND COMPUTER-GENERATED ATMOSPHERIC DISTURBANCES

The results of a two-phased program to investigate powered-lift aircraft handling quality degradation due to both naturally-occurring and computer-generated atmospheric turbulence are presented and discussed. In Phase I an airborne simulator was used to simulate a powered-lift aircraft on final approach. The atmospheric conditions included calm air, moderate to heavy turbulence, and frontal-type wind shears. In Phase II a ground-based simulator with a moving cockpit and a colored visual display was used to represent the same powered-lift aircraft. During Phase II, the Dryden model of atmospheric turbulence was used as well as the naturally-occurring wind profiles recorded during Phase I. Analysis of the data showed that the handling quality assessments obtained in the airborne and ground-based simulators were similar, but wind shear was responsible for more of the differences than turbulence. The comparison of the handling quality assessments and selected measures of combined pilot-vehicle performance obtained with the naturally-occurring and computer-generated turbulences demonstrate that the Dryden model can yield optimistic ratings of airplane handling qualities and an optimistic estimate of combined pilot-vehicle performance degradation in turbulent landing conditions. (Author)

  • Corporate Authors:

    Systems Technology, Incorporated

    2672 Bayshore Frontage Road
    Mountain View, CA  United States  94043

    Federal Aviation Administration

    Systems R&D Service, 800 Independence Avenue, SW
    Washington, DC  United States 
  • Authors:
    • Jewell, W F
    • Clement, W F
    • West, T C
    • Sinclair, SRM
  • Publication Date: 1979-5

Media Info

  • Pagination: 86 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00199035
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FAA-RD-79-59 Final Rpt., STI-TR-1099-3
  • Contract Numbers: DOT-FA77WA-3936
  • Files: NTIS, TRIS, USDOT
  • Created Date: Nov 7 1980 12:00AM