Technical Reports

Demonstration of the Budd Company Amcoach Tilt Body System

  • 01
  • Apr
  • 1983
AUTHOR: W. Clark Dean, James M. Herring Jr.
OFFICE: RPD
REPORT NUMBER: FRA/ORD-83/01
SUBJECT: Passenger Rail
KEYWORDS: Amfleet Tilt Body Coach, Tilt Body System, Curving Performance
ABSTRACT: The objective of this program was to demonstrate the Tilt System developed by The Budd Company. This system is applicable to any corridor and it will provide the most cost effective method of reducing trip times on the Northeast Corridor by allowing higher travel speeds on existing curves while maintaining the same level of passenger comfort. The Tilt System can be retrofit on the existing Amfleet cars with minimum modifications. The system is powered pneumatically. The controller is an on-off type. It is fail safe - in the event of a power failure, the system will return to the neutral position. This system allows increases in curving speeds of between 20% and 35% depending on superelevation as compared to conventional cars. The demonstration was successful. The system performed well under the design conditions and safely under extreme over-speed conditions. The subsequent analysis indicates that modified two—convoluted air springs could also be used with the tilt body.system. This would provide that the roll stiffness on the tilt body cars would always be equal to or greater than the conventional Amfleet cars.
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