DR Class 23.10

DR Class 23.10 (35.10)
35 1019-5
Number(s)
  • New: 23 1001 – 23 1113
  • 1970: 35 1001 – 35 1113
Quantity 113
Year(s) of manufacture 1955–1959
Retired 1991
Wheel arrangement 2-6-2
Axle arrangement 1′C1′ h2
Type P 35.18
Track gauge 1,435 mm (4 ft 8 1⁄2 in)
Length over buffers 22,660 mm (74 ft 4 1⁄4 in)
Empty weight 78.5 tonnes (77.3 long tons; 86.5 short tons)
Service weight 87.2 tonnes (85.8 long tons; 96.1 short tons)
Adhesive weight 54.7 tonnes (53.8 long tons; 60.3 short tons)
Axle load 18.3 tonnes (18.0 long tons; 20.2 short tons)
Top speed
  • Forwards: 110 km/h (68 mph)
  • Reverse: 50 km/h (31 mph)
Indicated Power 1,250 kW (1,700 PS; 1,680 hp)
Driving wheel diameter 1,750 mm (5 ft 8 7⁄8 in)
Leading wheel diameter 1,000 mm (3 ft 3 3⁄8 in)
Trailing wheel diameter 1,250 mm (4 ft 1 1⁄4 in)
No. of cylinders Two, outside
Cylinder bore 550 mm (21 5⁄8 in)
Piston stroke 660 mm (26 in)
Boiler Overpressure 16 bar (1.60 MPa; 232 psi)
No. of heating tubes 150
No. of smoke tubes 38
Heating tube length 4,200 mm (13 ft 9 1⁄4 in)
Grate area 3.71 square metres (39.9 sq ft)
Superheater area 68.50 m2 (737.3 sq ft)
Evaporative heating area 159.60 m2 (1,717.9 sq ft)
Tender 2′2′ T28
Water capacity 28 m3 (990 cu ft) or 28,000 litres (6,200 imp gal; 7,400 US gal)
Fuel Coal: 10 tonnes (9.8 long tons; 11 short tons)

The steam locomotives of DR Class 23.10, (from 1 June 1970 Class 35.10) were passenger train engines built for the Deutsche Reichsbahn in East Germany after the Second World War.

History

35 1097-1 in Dresden in 1999

The Class 23.10 was an evolutionary development by the DR of the DRG Class 23 standard locomotives or Einheitsdampflokomotiven built earlier by the Deutsche Reichsbahn-Gesellschaft. Only two of the latter were completed due to the onset of the war. The same dimensions were used for the driving and running gear, but the locomotives were given IfS/DR mixer-preheaters, boilers equipped with combustion chambers and a large driver's cab. The feedwater dome was omitted from locomotives numbered 23 1003 and later. The first of 113 units was deployed in 1955, and they were used for light to medium express train services, being allocated numbers 23 1001–1113.

With the introduction of EDP numbering on 1 January 1970, all locomotives were re-numbered to 35 1001–1113.

The last engines were retired from Nossen in May 1977, number 35 1113 however had to be reactivated due to the energy crisis and continued in service until 1985.

The locomotives were equipped with tenders of Class 2'2' T 28.

Preserved locomotives

Remaining locomotives of this class today include:

See also

Literature

  • Ebel, J.U.; Stange, A.; Schlegel, D. (2003). Die Baureihe 23.10 (in German). Freiburg: EK-Verlag. ISBN 978-3-88255-123-5.
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