Fluid Endurance Time Tests Using the NCAR Snow Machine: Ethylene Glycol-Based Type II and IV Fluids, Type I Fluids and Conditions Near and Above 0 Degrees C

This report summarizes the results of three investigations of the use of the National Center for Atmospheric Research (NCAR) Snow Machine in anti-icing fluid endurance time tests. The first investigation focused on its performance for ethylene glycol-based Type II and Type IV fluids; the second examined its suitability for testing Type I fluids, and the third examined its suitability for testing at temperatures near and above 0 degrees C. Endurance time tests of Type II and IV fluids conducted in 2004 using the snow machine showed that it gave results that generally compared well with results from outdoor tests at the same conditions for all fluids except the only ethylene glycol-based fluid tested, ULTRA+. However, the number of tests was limited, and some had highly varying conditions. This report presents the results of subsequent ULTRA+ tests conducted to determine if the poor performance was more likely due to factors such as variable wind speed or direction, snowfall rate, or possibly experimental error, or to an inherent flaw in the snow machine for this particular fluid type.

  • Record URL:
  • Corporate Authors:

    National Center for Atmospheric Research

    1850 Table Mesa Drive
    Boulder, CO  United States  80305

    Federal Aviation Administration

    800 Independence Avenue, SW
    Washington, DC  United States  20591
  • Authors:
    • Rasmussen, R
    • Landoff, S
  • Publication Date: 2009-8


  • English

Media Info

  • Media Type: Print
  • Edition: Final Report
  • Pagination: 28p

Subject/Index Terms

Filing Info

  • Accession Number: 01150534
  • Record Type: Publication
  • Files: TRIS, USDOT
  • Created Date: Feb 5 2010 12:47PM