A Potential Solution for De/Anti-Icing of Commuter Aircraft

In 2002-03, APS examined potential solutions to address the holdover time restrictions of Type I fluid. One potential solution examined was the spraying of heated Type IV fluids through Type I spray equipment to produce a lower viscosity fluid. The idea was based on the assumption that production samples of heated Type IV fluid would retain sufficient viscosity following a spray through a Type I delivery system to provide a minimum of 15 minutes of holdover time in snow. Testing was conducted at three American Eagle Airlines stations in 2003: Dubuque, Quebec City, and Dallas/Fort Worth. Viscosity and endurance time tests were performed with the Type IV samples collected at the three sites. Even when the Type IV fluid was severely sheared by the Type I spray equipment, the endurance time results with these samples were very long. The positive test results led to the belief that a severely sheared anti-icing fluid could be certified to AMS 1428 as a Type III fluid. Transport Canada produces a Type III generic holdover timetable annually even though no Type III fluids currently exist. In 2002-03, APS produced three simulated Type III fluids by mechanically shearing certified Type II products to low viscosity levels. Tests were performed in natural snow and simulated precipitation using standard endurance time testing procedures. The endurance time tests produced very encouraging results. One product had endurance times that were all above the values in the current Transport Canada Type III holdover time guidelines.

  • Corporate Authors:

    Transport Canada

    Transportation Development Centre, 800 Rene-Levesque Boulevard West, Suite 600
    Montreal, Quebec  Canada  H3B 2X1

    APS Aviation, Incorporated

    1100 Rene Levesque Boulevard West, Suite 1340
    Montreal, Quebec H3B 4N4,   Canada 
  • Authors:
    • Chaput, C
  • Publication Date: 2004-11


  • English
  • French

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 99p

Subject/Index Terms

Filing Info

  • Accession Number: 01000313
  • Record Type: Publication
  • Report/Paper Numbers: TP 14152E
  • Files: TRIS
  • Created Date: May 18 2005 2:11PM