The lightweight, Swedish-built Rc4a locomotive is currently under lease to AMTRAK for testing in the Northeast Corridor. Experience with the unit, which weighs 81650 kg, and with an additional French unit that will undergo tests early in 1977 will be valuable to AMTRAK in developing specifications for a new generation of high-speed locomotives that will be needed to upgrade the Northeast Corridor for 193-km/h (120-mph) speeds. The locomotive has a thyristor control system which provides completely stepless acceleration and incorporates an early warning wheel-slip control device that enables it to accelerate rapidly, with relatively heavy loads, to high speeds. The application of the thyristors also makes it possible to use separately excited traction motors, resulting in maximum traction for each individual axle. The locomotive's creep control system permits the maximum use of the available adhesion on every occasion, gives complete protection against slipping, and operates fully automatically. The Rc4a, it is claimed, has a adhesion equivalent to 33 percent of its weight.

Media Info

  • Features: Photos;
  • Pagination: p. 7-10
  • Serial:

Subject/Index Terms

  • Subject Areas: Highways; Vehicles and Equipment;

Filing Info

  • Accession Number: 00179017
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jan 13 1979 12:00AM