DRG Class ET 171

Last updated
Deutsche Reichsbahn Gesellschaft Baureihe ET 171
ET171 PA030035.JPG
Preserved ET 171 082 in Aumühle station
Type and origin
Power typeElectric
Builder LHB, MAN, Wegmann, BBC
Build date1939-1943
1954-1955
1958
Total produced72
Specifications
Configuration:
   UIC Bo′Bo′+2′2′+Bo′Bo′
Gauge 1,435 mm (4 ft 8+12 in) standard gauge
Length61 m (200 ft 2 in)
Loco weight130 t (130 long tons; 140 short tons)
Electric system/s 1,2 kV DC third rail
Current pickup(s) Third rail
Train brakes Air, electric
Safety systems Sifa, PZB
Performance figures
Maximum speed80 km/h (50 mph)
Power output1,160  kW (1,560  hp)
Tractive effort 170  kN (38,000 lbf)
Career
OperatorsDeutsche Reichsbahn Gesellschaft
Deutsche Bundesbahn
Deutsche Bahn AG
Hamburg S-Bahn
Class ET/EM 171, since 1968: 471/871
Retired1989-2001

The DRG Class ET 171 (since 1968 DB Class 471/871) was a three-car electric multiple unit built for the S-Bahn Hamburg (rapid transit railway).

Contents

History

The first electrically operated Hamburg S-Bahn trains had appeared on the Hamburg-Altona City and Suburban Railway in 1907. In 1937, the main-line railway operator, Deutsche Reichsbahn, decided to switch current collection from overhead catenary (AC 6,3 kV/25 Hz) to third rail (DC 1,2 kV), basically adopting the S-Bahn system established in Berlin from 1924 onwards. The new class ET 171 trains were built to replace antiquated overhead stock based on non-corridor coaches. The first ET 171 unit appeared in Hamburg in December 1939. [1]

Between then and 1943 further 46 trainsets were built. They received a distinctive dark blue livery with a broad cream stripe on the centre car to denote the 2nd (from 1955: 1st) class. Production was halted by World War II. It was not resumed until 1954/55 when a further batch of 21 units (ET 171 061-082) were built to finally abandon overhead operation. Five additional units (ET 171 082-086) were built in 1958 to work the new line between Hamburg Central Station and Bergedorf (today line S2). From 1968 the class was designated as 471 (and the non-motorized centre cars as 871 respectively). In the 1970s and 80s, most trains received the new cream and teal livery, introduced with Class 472 in 1974.

1980s modernisation scheme

At the beginning of the 1980s the class was due for replacement. State owned train operator Deutsche Bundesbahn opted for a modernisation scheme instead, as its Stuttgart-Bad Canstatt works had abundant capacity for carrying out the task. The programme started in late 1984 and focused on body work, replacing the 1930s style windows with modern rubber sealed replacements in newly welded in sections. The scheme was soon considered uneconomic and ended prematurely in October 1987 after 22 units.

Withdrawal and preservation

Four units ceased operation between 1989 and 1991 but mass-withdrawals did not start until 1997 when new class 474 units entered service. The modernized EMUs did not last longer than the non-rebuild ones. The last unit 471 062 was retired from regular service in October 2001, having accumulated 4.6 million kilometres.

One complete unit and four single coaches survive until today:

Preserved driving car 471 462 at Hamburg-Ohlsdorf S-Bahn works. Driving Unit from EMU 471 062.jpg
Preserved driving car 471 462 at Hamburg-Ohlsdorf S-Bahn works.

Technical equipment

The ET 171 were among the first German light-weight steel constructions for railways. The coaches were designed as self-sustained bodies. The prewar units had block brakes while those built in the 1950s used disc brakes. All doors could be automatically closed from the driver's cab but could be opened again after a short time. This was possible until the 1970s due to safety reasons. All trains had two 2nd class end coaches and a 1st class centre coach. The first class service was removed from all Hamburg S-Bahn trains in November 2000. Lighting was provided by uncovered light bulbs. All trains were equipped with Sifa. Only the last unit 471 062 was equipped with the PZB train safety system when used for excursions between 2001 and 2004.

Upon its arrival at the German Museum of Techchnology Railcar 471 462 from Hamburg was placed next to its Berlin siblings ("Banker's train" coach ET 125 001 - center - from 1935 and two-coach "Stadtbahn" unit ET/ES 165 358 built in the 1920s). EMU-coach 471 462 of the S-Bahn Hamburg and two generations of Berlin S-Bahn EMUs. All vehicles owned by German Museum of Technolgy, Berlin..jpg
Upon its arrival at the German Museum of Techchnology Railcar 471 462 from Hamburg was placed next to its Berlin siblings ("Banker's train" coach ET 125 001 - center - from 1935 and two-coach "Stadtbahn" unit ET/ES 165 358 built in the 1920s).

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References

  1. de:DRG-Baureihe ET 171Translation from the German Wikipedia article
  2. "Unser Museumszug ET/EM 171 082 / Our heritage Train ET/EM 171 082 (German)". Verein Historische S-Bahn Hamburg e.V. (in German). 2016-11-05. Retrieved 2019-05-30.
  3. "(German) VVM - Eisenbahnmuseum Lokschuppen Aumühle". www.vvm-museumsbahn.de. Retrieved 2019-05-30.
  4. "65 Jahre alte Hamburger S-Bahn jetzt in Berlin / 65 years old S-Bahn train now in Berlin (German)". www.tagesspiegel.de (in German). Retrieved 2019-05-30.