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The Siemens-Düwag U2 is a type of light-rail tram vehicle (LRV). The cars were built by consortium of Siemens, Wegmann & Co. and Düwag. The U2 design was built on the Siemens U1 prototype tram built in 1965 (now stored at a Frankfurt tram museum).

Originally designed for and used by the Frankfurt U-Bahn, the model of car was adopted for light-rail use by transit systems in Edmonton, Calgary, and San Diego, during a period in which few purpose-built trams were being manufactured. All U2 cars were built between 1968 and 1990.


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Technical details

The U2's dimensions are 24.284 m (79 ft 8.1 in) by 2.650 m (8 ft 8.3 in) by 3.66 m (12 ft 0 in). In the US and Canada, usually up to five U2 cars are coupled to run as a train. Each articulated car has a total passenger capacity of 264 passengers. It may be equipped with two DC motors for a total power output of 300 kW (400 hp) and a maximum speed of 80 km/h (50 mph), or with four AC motors for an output of 544 kW (730 hp) and speed of 88 km/h (55 mph).

As the length of a tram or light-rail train running on shared track is restricted to a maximum of 105 meters in Germany, up to four U2 cars may be used in a single consist on such track.

Frankfurt U2 cars use Scheren (diamond) or single-arm (z-shaped) pantographs, while Calgary, Edmonton and San Diego vehicles use a single-arm (z-shaped) pantograph.

  • Manufacturer: Düwag Düsseldorf, West Germany
  • Type: Double-ended articulated car, 6 axle, multiple-unit operation
  • Height: 12.4 feet (3,780 mm)
  • Width: 8.7 feet (2,652 mm)
  • Length: 76 feet (23.165 m), 76.71 feet (23.381 m) or 88.5 feet (26.975 m)
  • Weight (empty): 77,161 pounds (35,000 kg), 89,000 pounds (40,370 kg) or 97,900 pounds (44,407 kg)
  • Car Body: Lightweight welded steel
  • Wheels: Steel-tired with acoustic dampening
  • Dynamic Braking
  • Speed: 50 to 55 mph (80.5 to 88.5 km/h)
  • Overhead Traction Power: 600 V DC

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Variants

Siemens-Düwag Type U3 is an upgraded version of the U2 with a slightly longer length and cosmetic changes. Introduced in 1977, they entered service in 1980 and were never exported outside of Germany's Frankfurt U-Bahn.

Siemens-Düwag Type U2A on Sacramento Regional Transit's light rail system is an upgraded version of the U2 that shares similar characteristics of the newer SD-100s and SD-160s, yet it still uses the mechanical equipment of the U2.


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U2 cars acquired, by city

  • Calgary (C-Train) -- 85 cars (83 U2-DC, and 2 U2-AC acquired from Edmonton)
  • Edmonton (Edmonton Light Rail Transit) -- 37 cars (Now upgraded to have electronic LED destination signs on the exterior and interior)
  • Frankfurt (Public transport in Frankfurt am Main) -- 104 cars
  • San Diego (San Diego Trolley) -- 71 cars; U2 cars completely retired from service on the San Diego Trolley on January 26, 2015
  • Mendoza (Metrotranvía Mendoza) -- 11 cars (provided by San Diego)

U2a cars acquired, by city

  • Sacramento (Sacramento Regional Transit District Light Rail) - 26 cars

Source of the article : Wikipedia