DRG Class 23
Number(s)DRG 23 001 – 23 002
Year(s) of manufacture1941
Wheel arrangement2-6-2
Axle arrangement1'C1'
Axle arrangement1'C1' h2
TypeP 35.18
Track gauge1,435 mm (4 ft 8 12 in)
Length over buffers22,940 mm (75 ft 3 in)
Empty weight80.1 t (78.8 long tons; 88.3 short tons)
Service weight88.3 t (86.9 long tons; 97.3 short tons)
Service weight incl. tender148.2 t (145.9 long tons; 163.4 short tons)
Adhesive weight53.9 t (53.0 long tons; 59.4 short tons)
Axle load18.0 t (17.7 long tons; 19.8 short tons)
Top speed110 km/h (68 mph)
Indicated Power1,500 PS (1,103 kW; 1,479 hp)
Coupled wheel diameter1,750 mm (68.90 in)
Driving wheel diameter1,750 mm (68.90 in)
Leading wheel diameter1,000 mm (39.37 in)
Trailing wheel diameter1,250 mm (49.21 in)
No. of cylinders2
Cylinder bore550 mm (21.65 in)
Piston stroke660 mm (25.98 in)
Boiler Overpressure16 bar (1,600 kPa; 230 psi)
No. of heating tubes113
No. of smoke tubes35
Grate area3.89 m2 (41.9 sq ft)
Superheater area63.60 m2 (684.6 sq ft)
Evaporative heating area177.83 m2 (1,914.1 sq ft)
Tender2'2' T 26
Water capacity26.0 m3 (920 cu ft)
Train heatingSteam

The German Class 23 (Baureihe 23 or BR 23) engines of the Deutsche Reichsbahn (DRG) were standard (Einheitslokomotiven) steam engines that were conceived as a replacement for the Prussian P 8 by the Schichau Works. They were given the same boiler as the Class 50s which were developed in parallel and, like them, the newly developed 2'2' T 26 tender with its front wall that protected train crews during reverse running.

In 1941 the two prototypes were built and delivered. The procurement of 800 locomotives had been planned, however the constraints of the Second World War meant that they never entered full production.

After the war the two locomotives, with operating numbers 23 001 and 23 002, went to the DR in East Germany and were variously stabled in Berlin, Brandenburg an der Havel, Jüterbog and Halle. In 1961, number 23 001 was given a Reko boiler with combustion chamber, developed for the Class 50. In 1970 the locomotive was given EDP number 35 2001-2. Number 23 002 was to be reconstructed, but was retired however in 1967 due to damage to the frame and scrapped. Number 23 001 was scrapped in 1975 in Cottbus, as it could no longer serve any useful purpose.

After the war, the design of these Class 02 locomotives formed the basis for the new DB Class 23 and DR Class 23.10 locomotives which received the same class designation.

See also