DR Class 52.80

The Rekolokomotives of DR Class 52.80 first appeared in 1960 in service with the Deutsche Reichsbahn in East Germany as extensive rebuilds of the wartime locomotives or Kriegslokomotiven of DRB Class 52. This modernisation, described as 'reconstruction' (Rekonstruktion, hence Rekolokomotive), extended to almost all of the components and systems on the engine.

DR Class 52.80 (Rebuilt : 200 : DRB Class 52)
Rekolok 52 8177
Number(s)	DR 52 8001–8200
Quantity	200
Manufacturer	RAW Stendal
Year(s) of manufacture	1960–1967
Retired	In service until the end of steam traction in the DR, approximately 1988
Wheel arrangement	2-10-0
Axle arrangement	1′E h2
Type	G 56.15
Track gauge	1,435 mm (4 ft 8 ^1⁄2 in)
Length over buffers	22.975 m (75 ft 4 ^1⁄2 in)
Overall wheelbase	9.2 m (30 ft 2 ^1⁄4 in)
Wheelbase incl. tender	19 m (62 ft 4 in)
Service weight	89.7 t (88.3 long tons; 98.9 short tons)
Adhesive weight	79.6 t (78.3 long tons; 87.7 short tons)
Top speed	forwards: 80 km/h (50 mph) backwards: 50 km/h (31 mph)
Indicated Power	1,470 kW (2,000 PS; 1,970 hp)
Driving wheel diameter	1,400 mm (4 ft 7 ^1⁄8 in)
Leading wheel diameter	850 mm (2 ft 9 ^1⁄2 in)
Cylinder bore	600 mm (23 ^5⁄8 in)
Piston stroke	660 mm (26 in)
Boiler Overpressure	16 bar (1.60 MPa; 232 psi)
No. of heating tubes	124
No. of smoke tubes	38
Heating tube length	4,700 mm (15 ft 5 in)
Grate area	3.71 m^2 (39.9 sq ft)
Radiative heating area	17.9 m^2 (193 sq ft)
Tube heating area	154.5 m^2 (1,663 sq ft)
Superheater area	64.5 m^2 (694 sq ft)
Evaporative heating area	172.3 m^2 (1,855 sq ft)
Tender service weight	18.5 t (18.2 long tons; 20.4 short tons)
Water capacity	30 m^3 (1,100 cu ft) or 30,000 l (6,600 imp gal; 7,900 US gal)
Fuel	10 t (9.8 long tons; 11 short tons) coal
Brakes	Knorr
Train heating	Steam

Overview

This reconstruction should not to be confused with the general repair of a number of locomotives which was also carried out in the Stendal Reichsbahn repair shop (Reichsbahnausbesserungswerk or RAW) from 1959 onwards. Under that programme only the refinements omitted during wartime were added back, and worn out components - or those which were too small (again for wartime austerity reasons) - were replaced. Usually only the firebox and pony trucks were replaced. These refurbished engines retained their original numbers, however the Rekoloks were reorganised, irrespective of their original numbers, into sub-class 52.80.

For economic reasons the general repair programme was cut back, nevertheless in early summer 1960 work began on the reconstruction of Class 52 at RAW Stendal. Up to 1967, 200 locomotives were rebuilt with a slightly modified, Typ 50E, combustion-chambered boiler, originally designed for the Class 50.35. Other notable features of the Rekolok were new, welded cylinders, an IfS/DR mixer-preheater system and a new driver's cab front walls with oval windows, mainly on account of the new boiler. The intention to replace the entire the cab and provide the engines with new tenders did not come about. The worn out Class 2'2'T30 tub tenders were mainly given new tubs.

Other reconstruction measures included the installation of axle box tightening wedges and the replacement of the Krauss-Helmholtz bogies. Despite often expressed views to the contrary, the valves were not replaced or rebuilt as part of the reconstruction. The 52.80 had standard piston valves with Winterthur pressure equalisation and hence poor riding qualities when running light. Not until the 1980s were Trofimoff valves and cylinder safety valves installed on some locomotives at RAW Meiningen. This improved the riding performance hugely when the engines ran without a train, something which was also noticeable in terms of savings in lubricants and fuel.

Some locomotives were also fitted with Giesl-Gieslingen suction draught systems, the so-called Giesl ejectors. However, for licensing reasons, these were removed once they had worn out or become defective.

Surviving locomotives

Of the originally 200 locomotives reconstructed, a large number are still in existence in the hands of various owners in varying condition (see List of preserved steam locomotives in Germany). At present (August 2007) ten working examples are known of. Number 52 8055 was extensively rebuilt, using advanced steam technology, oil firing and roller bearings for both axles and drive by the Swiss company Dampflokomotiv- und Maschinenfabrik DLM AG in 1998.[1] Since 2003 it is owned by its rebuilder DLM AG and based in Schaffhausen, Switzerland. Being equipped with automatic trainstop of both Signum and ETCS-LS type it is fully certified for operation on the Swiss standard gauge network.

Gallery

• 
  DR 52 8087 at Raw Berlin-Schöneweide
• 
  Rekolok DR 52 8080 at Bw Dresden-Altstadt
• 
  Rekolok DR 52 8177 at Bw Dresden-Altstadt
• 
  Rekolok DR 52 8079 on the turntable at the railway museum Bw Dresden-Altstadt
• 
  52 8134 with a charter train of the Eisenbahnfreunde Betzdorf in Hilchenbach-Lützel
• 
  A charter train with the 52 8134 on the viaduct at Rudersdorf in December 2012
• 
  The most up to date class 52, 52 8055 completely rebuilt, in service on the Hauenstein for a demonstration week.

See also

• Deutsche Reichsbahn (East Germany)
• List of East German Deutsche Reichsbahn locomotives and railbuses
• DRB Class 52
• Rekolok
• List of preserved steam locomotives in Germany

References

1. Waller, Roger M. (July 2004). "Die Modernisierung der Dampflokomotive 52 8055". Eisenbahn-Revue International (in German). Heft: 301–305. ISSN 1421-2811.

• Reimer, Michael; Endisch, Dirk. Baureihe 52.80 - Die rekonstruierte Kriegslokomotive. GeraMond. ISBN 3-7654-7101-1.

External links

• Photos, data and information about DR Class 52.80s (German)