DB Class 23

Specifications
Specifications
Configuration:;
• Whyte	2-6-2
• UIC	1′C1′ h2
• German	P 35.18
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Leading dia.	1,000 mm (3 ft 3+3⁄8 in)
Driver dia.	1,750 mm (5 ft 8+7⁄8 in)
Trailing dia.	1,250 mm (4 ft 1+1⁄4 in)
Tender wheels	1,000 mm (3 ft 3+3⁄8 in)
Wheelbase:
• Axle spacing; (Asymmetrical)	2,950 mm (9 ft 8+1⁄8 in) +; 2,000 mm (6 ft 6+3⁄4 in) +; 2,000 mm (6 ft 6+3⁄4 in) +; 2,950 mm (9 ft 8+1⁄8 in) =;
• Engine	9,900 mm (32 ft 5+3⁄4 in)
• Tender	1,900 mm (6 ft 2+3⁄4 in) +; 1,900 mm (6 ft 2+3⁄4 in) +; 1,900 mm (6 ft 2+3⁄4 in) =; 5,700 mm (18 ft 8+3⁄8 in);
• incl. tender	17,625 mm (57 ft 9+7⁄8 in)
Length:;
• Over buffers	21,325 mm (69 ft 11+5⁄8 in)
Height	4,550 mm (14 ft 11+1⁄8 in)
Axle load	18.7 tonnes (18.4 long tons; 20.6 short tons)
Adhesive weight	56.0 tonnes (55.1 long tons; 61.7 short tons)
Empty weight	74.6 tonnes (73.4 long tons; 82.2 short tons)
Service weight	82.8 tonnes (81.5 long tons; 91.3 short tons)
Tender type	2′2′ T 31
Fuel type	Coal
Fuel capacity	8 tonnes (7.9 long tons; 8.8 short tons)
Water cap.	31 m3 (6,800 imp gal; 8,200 US gal)
Firebox:
• Grate area	3.11 m2 (33.5 sq ft)
Boiler:;
• Pitch	3,250 mm (10 ft 8 in)
• Tube plates	4,000 mm (13 ft 1+1⁄2 in)
• Small tubes	44.5 mm (1+3⁄4 in), 130 off
• Large tubes	118 mm (4+5⁄8 in), 54 off
Boiler pressure	16 bar (16.3 kg/cm2; 232 psi)
Heating surface:
• Firebox	17.10 m2 (184.1 sq ft)
• Tubes	64.53 m2 (694.6 sq ft)
• Flues	74.65 m2 (803.5 sq ft)
• Total surface	156.28 m2 (1,682.2 sq ft)
Superheater:;
• Heating area	73.80 m2 (794.4 sq ft)
Cylinders	Two, outside
Cylinder size	550 mm × 660 mm (21+5⁄8 in × 26 in)
Valve gear	Heusinger (Walschaerts)

Type and origin
Type and origin
Power type	Steam
Builder	Henschel & Sohn (29); Arnold Jung Lokomotivfabrik (51); Krupp (21); Maschinenfabrik Esslingen (4);
Build date	1950–1959
Total produced	105

DB Class 23
DB Class 23
	23 042 in Darmstadt-Kranichstein, May 2005
Power type
Type and origin
Power type	Steam
Builder	Henschel & Sohn (29); Arnold Jung Lokomotivfabrik (51); Krupp (21); Maschinenfabrik Esslingen (4);
Build date	1950–1959
Total produced	105
Configuration:;
Specifications
Configuration:;
• Whyte	2-6-2
• UIC	1′C1′ h2
• German	P 35.18
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Leading dia.	1,000 mm (3 ft 3+3⁄8 in)
Driver dia.	1,750 mm (5 ft 8+7⁄8 in)
Trailing dia.	1,250 mm (4 ft 1+1⁄4 in)
Tender wheels	1,000 mm (3 ft 3+3⁄8 in)
Wheelbase:
• Axle spacing; (Asymmetrical)	2,950 mm (9 ft 8+1⁄8 in) +; 2,000 mm (6 ft 6+3⁄4 in) +; 2,000 mm (6 ft 6+3⁄4 in) +; 2,950 mm (9 ft 8+1⁄8 in) =;
• Engine	9,900 mm (32 ft 5+3⁄4 in)
• Tender	1,900 mm (6 ft 2+3⁄4 in) +; 1,900 mm (6 ft 2+3⁄4 in) +; 1,900 mm (6 ft 2+3⁄4 in) =; 5,700 mm (18 ft 8+3⁄8 in);
• incl. tender	17,625 mm (57 ft 9+7⁄8 in)
Length:;
• Over buffers	21,325 mm (69 ft 11+5⁄8 in)
Height	4,550 mm (14 ft 11+1⁄8 in)
Axle load	18.7 tonnes (18.4 long tons; 20.6 short tons)
Adhesive weight	56.0 tonnes (55.1 long tons; 61.7 short tons)
Empty weight	74.6 tonnes (73.4 long tons; 82.2 short tons)
Service weight	82.8 tonnes (81.5 long tons; 91.3 short tons)
Tender type	2′2′ T 31
Fuel type	Coal
Fuel capacity	8 tonnes (7.9 long tons; 8.8 short tons)
Water cap.	31 m3 (6,800 imp gal; 8,200 US gal)
Firebox:
• Grate area	3.11 m2 (33.5 sq ft)
Boiler:;
• Pitch	3,250 mm (10 ft 8 in)
• Tube plates	4,000 mm (13 ft 1+1⁄2 in)
• Small tubes	44.5 mm (1+3⁄4 in), 130 off
• Large tubes	118 mm (4+5⁄8 in), 54 off
Boiler pressure	16 bar (16.3 kg/cm2; 232 psi)
Heating surface:
• Firebox	17.10 m2 (184.1 sq ft)
• Tubes	64.53 m2 (694.6 sq ft)
• Flues	74.65 m2 (803.5 sq ft)
• Total surface	156.28 m2 (1,682.2 sq ft)
Superheater:;
• Heating area	73.80 m2 (794.4 sq ft)
Cylinders	Two, outside
Cylinder size	550 mm × 660 mm (21+5⁄8 in × 26 in)
Valve gear	Heusinger (Walschaerts)
Maximum speed
Performance figures
Maximum speed	forwards: 110 km/h (68 mph); backwards: 85 km/h (53 mph);
Operators
Career
Operators	Deutsche Bundesbahn
Numbers	23 001 – 23 105
Retired	by 1976

The steam locomotives of Class 23 were German passenger train locomotives developed in the 1950s for the Deutsche Bundesbahn. They had a 2-6-2 wheel arrangement and were equipped with Class 2'2' T 31 tenders. They were designed to replace the once ubiquitous Prussian P 8 engines that had been built between 1908 and 1924 and, in their day, were the most numerous post-war replacement class.