The turbulent characteristics of 17 Canadian cumulus clouds have been documented using the measurements from a specially instrumented T-33 aircraft. Most of the 33 cloud penetrations were made through the tops of cumuli 1-4.5 km in depth. Turbulent energy spectra over a range of wavelengths from 15 to 2500 m have been obtained for the two horizontal and the vertical gust velocities. Mean flow characteristics, especially any expected updrafts, tended to be obscured by turbulent fluctuations. Based on measured accelerations, estimates were made of expected vertical forces on several aircraft with a wide range of wind loadings. Cumulus clouds similar to those studied do not pose a safety hazard to these aircraft, and crew and passengers can easily tolerate the turbulence levels.

  • Corporate Authors:

    National Research Council of Canada

    Division of Mechanical Engineering, Montreal Road
    Ottawa, ONo K1A 0R6,   Canada 
  • Authors:
    • Macpherson, J I
    • ISAAC, G A
  • Publication Date: 0

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00173096
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: DME/NAE 2
  • Files: TRIS
  • Created Date: Jun 14 1978 12:00AM