A flight investigation was conducted to determine the characteristic shapes of the altitude, ground speed, and deceleration profiles of visual approaches for helicopters. Two hundred thirty-six visual approaches were flown from nine sets of initial conditions with four types of helicopters. Mathematical relationships were developed that describe the characteristic visual deceleration profiles. These mathematical relationships were expanded to develop equations which define the corresponding nominal ground speed, pitch attitude, pitch rate, and pitch acceleration profiles. Results are applicable to improved helicopter handling qualities in terminal area operations. (Author)

  • Supplemental Notes:
    • Subm-Prepared in Cooperation with Army Air Mobility R and D Lab., Hampton, VA.
  • Corporate Authors:

    Langley Research Center

    National Aeronautics and Space Administration
    Hampton, VA  United States  23665
  • Authors:
    • Moen, G C
    • Dicarlo, D J
    • Yenni, K R
  • Publication Date: 1976-12

Media Info

  • Pagination: 41 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00154565
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: NASA-TN-D-8275
  • Contract Numbers: DA 1F2-62209-AH-76
  • Files: TRIS
  • Created Date: May 31 1977 12:00AM