| DR Class 23.10 (35.10) | |
|---|---|
| Number(s): | 23 1001–1113 |
| Quantity: | 113 |
| Year(s) of manufacture: | 1955–1959 |
| Retired: | 1991 |
| Wheel arrangement: | 2-6-2 |
| Axle arrangement: | 1'C1' h2 |
| Type: | P 35.18 |
| Gauge: | 1,435 mm |
| Length over buffers: | 22,660 mm |
| Service weight: | 87.2 t |
| Axle load: | 18.3 t |
| Top speed: | 110/50 km/h |
| Indicated Power: | 1,250 kW |
| Driving wheel diameter: | 1,750 mm |
| Leading wheel diameter: | 1,000 mm |
| Trailing wheel diameter: | 1,250 mm |
| No. of cylinders: | 2 |
| Cylinder bore: | 550 mm |
| Piston stroke: | 660 mm |
| Boiler Overpressure: | 16 bar |
| Grate area: | 3.71 m |
| Superheater area: | 68.50 m² |
| Evaporative heating area: | 159.60 m² |
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.
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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.
On the introduction of EDP numbering from 1 January 1970 the locomotives were all renumbered 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.
Remaining locomotives of this class today include:
J.-U. Ebel/A. Stange/D. Schlegel "Die Baureihe 23.10" (2003) EK-Verlag, Freiburg ISBN 978-3-88255-123-5
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