COMPOSITION BRAKE-BLOCKS-EFFECTS OF HUMIDITY ON BRAKING

Tests carried out by the SNCF, to determine the effects of humidity on braking; were made with 20 different types of existing composition brake-block. On the test rig at Vitry, braking tests were made from speeds of up to 160 km/h to a stop, and continuous braking tests were made with single cars at about 60 km/h. In service, fly-shunting tests at speeds of up to 140 km/h were made. The brake-block wear was not measured during the tests on wet rails. The similarity of the curves obtained with the different makes of block on dry wheels was not repeated on wet wheels. It would seem that not all the blocks have been designed and manufactured with the same object of obtaining satisfactory performances under wet conditions.

• Supplemental Notes:
  • Restrictions on the use of this document are contained in the explanatory material.
• Corporate Authors:

  International Union of Railways

  Office of Research and Experiments
  Utrecht,   Netherlands 
• Publication Date: 1968-4

Media Info

• Features: Figures; Photos; Tables;
• Pagination: 16 p.

Subject/Index Terms

• TRT Terms: Brake shoes; Brakes; Braking; Dynamics; Moisture content; Railroad rails; Technology; Train track dynamics; Wear; Wheels
• Geographic Terms: France
• Old TRIS Terms: Braking systems; Question b64; Wetness
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00040403
• Record Type: Publication
• Report/Paper Numbers: B64/RP 4/E
• Files: TRIS
• Created Date: Jan 22 1976 12:00AM