Technical Reports

FAST/HAL Turnout and Frog Performance Tests

  • 01
  • Nov
  • 1991
AUTHOR: David Read, Jon Hannafious
OFFICE: RPD
REPORT NUMBER: FRA\ORD-91\25
SUBJECT: Facilities & Test Equipment, Evaluation
KEYWORDS: Components, Maintenance, Facility for Accelerated Service Testing, Heavy Axle Load
ABSTRACT: Turnouts on the High Tonnage Loop were monitored for component failures and maintenance demand during 160 MGT of Heavy Axle Load operation at the Transportation Test Center, Facility for Accelerated Service Testing (FAST), Pueblo, Colorado. A "frog farm" was included to increase the scope of the experiment. At 100 MGT, a No. 20 turnout of premium components was installed replacing the existing standard component turnout. Seventy-seven percent less maintenance was recorded on the premium turnout after 60 MGT of traffic than was recorded on the standard turnout. Component failures further point out the importance of using premium materials to extend turnout component life. Five isolated frogs (AREA and European vee-nose designs) were installed in tangent track of the frog farm. The frogs were monitored for wear, fatigue, and maintenance demand. AREA frogs exhibited more initial metal flow on the frog point and thus required more grinding. One AREA frog made with conventional materials was removed from test at only 48 MGT due to fatigue failure. The European V-nose frogs have a different point geometry which resulted in smoother wheel transfer through the frog.

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