ROLL ACTION TESTS OF 100-TON HOPPER CARS ON THE GULF, MOBILE AND OHIO RAILWAY

The GM and O conducted extensive induced roll action tests on Commonwealth Edison 100-ton hopper cars being used in unit coal train service. The tests were conducted on tangent track, laid with 112-lb. rail. A target was placed on top of the car at its center and a transit was set up on an overhead bridge to measure the amount of lateral movement of the top of the car in inches. It was found to be possible to measure the car roll accurately in this manner. The amount of wheel lift was estimated. These cars are equipped with rotary couplers for unloading. A friction type gage was used to measure the maximum spring deflection. Variations were made in the type and number of springs, with and without various types of snubbing devices, bolster gib clearance, and side bearing spacing. The data sheets give a description of the truck arrangement and the results obtained. It was decided after these tests that the standard equipment provided initially on these cars was satisfactory for their operations.

• Corporate Authors:

  Gulf Mobile and Ohio Railroad

  135 East 11th Place
  Chicago, IL  United States  60605
• Publication Date: 1964-8

Subject/Index Terms

• TRT Terms: Deflection; Freight cars; Hopper cars; Railroad cars; Rocking; Snubbers; Spring; Suspensions; Technology; Vehicle dynamics
• Geographic Terms: United States
• Old TRIS Terms: Car rocking; Spring deflection; Wheel lift
• Subject Areas: Railroads; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00037609
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM