AQUAPLANING BEHAVIOUR OF WINTER TYRES OF DIFFERENT TREAD DEPTHS

DAS AQUAPLANING-VERHALTEN VON WINTERREIFEN VERSCHIEDENER PROFILTIEFE

Tyres, size 165 rs 13, with differing tread depths (11.7 and 3 mm) were investigated on a 70 M long test track with 10 mm and 20 mm depth of water at a speed range of 70 km/h to 100 km/h. The measurements showed that the aquaplaning time rose more rapidly from 75 km/h at increasing speed, and more rapidly the smaller the tread depth was. Depending on tread depth, critical aquaplaning starts at 79 km/h, at 83 km/h or 83 km/h. Converting the aquaplaning time at 94 km/h to travel distance shows that with 11 mm tread depth, about 26 M distance is covered without making contact with the pavement, with 3 mm tread depth however 67 M are covered. Insufficient air pressure is just as dangerous as a worn down profile. The influence of water depth is very great. The 0.4 seconds value at 20 mm water depth is reached already at 86 km/h, at 10 mm water depth however, it is reached only at 95 km/h. This corresponds to road distances without pavement contact of 9.6 and 10.6 M respectively. Further results show that the form of the tread profile also has a great influence on the aquaplaning behaviour of a tyre. The construction of a tyre plays a part also, whereby the cause is entirely due to the distribution of pressure in the contact area between tyre and pavement. /TRRL/

  • Corporate Authors:

    Franckhlsche Verlagshandlung

    Pfizerstrasse 5, Postfach 640
    7000 Stuttgart 1,   Germany 
  • Authors:
    • Schilling, H
  • Publication Date: 1977-10

Language

  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00189156
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD, TRIS
  • Created Date: May 26 1979 12:00AM