DR Class 25.10

Type and originPower typeSteamBuilderLKM Babelsberg[de]Serial number120011/1, 120011/2Build date1954–1955Total produced2
Type and origin
Power typeSteam
BuilderLKM Babelsberg[de] Serial number120011/1, 120011/2
Build date1954–1955
Total produced2
SpecificationsConfiguration:• Whyte2-8-0• UIC1′D h2• German25 001: P 45.1725 1001: P 45.18Gauge1,435 mm (4 ft 8+1⁄2 in)Leading dia.1,000 mm (3 ft 3+3⁄8 in)Driver dia.1,600 mm (5 ft 3 in)Tender wheels1,000 mm (3 ft 3+3⁄8 in)Wheelbase:• Axle spacing (Asymmetrical)3,100 mm (10 ft 2 in) +2,600 mm (8 ft 6+3⁄8 in) +2,000 mm (6 ft 6+3⁄4 in) +2,000 mm (6 ft 6+3⁄4 in) =• Engine9,700 mm (31 ft 9+7⁄8 in)• Tender2′2′ T 30: 5,800 mm (19 ft 3⁄8 in)2′2′ T 27.5 Kst: 6,830 mm (22 ft 4+7⁄8 in)2′2′ T 28 Kst: 5,700 mm (18 ft 8+3⁄8 in)• Tender bogie1,900 mm (6 ft 2+3⁄4 in)• incl. tender25 001: 18,765 mm (61 ft 6+3⁄4 in)25 1001: 19,885 mm (65 ft 2+7⁄8 in)Length:• Over buffers25 001: 22,695 mm (74 ft 5+1⁄2 in)25 1001: 23,835 mm (78 ft 2+3⁄8 in)Height4,475 mm (14 ft 8+1⁄8 in)Axle load25 001: 17.6 t (17.3 long tons; 19.4 short tons)25 1001: 18.0 t (17.7 long tons; 19.8 short tons)Adhesive weight25 001: 70.4 t (69.3 long tons; 77.6 short tons)25 1001: 72.0 t (70.9 long tons; 79.4 short tons)Empty weight25 001: 77.3 t (76.1 long tons; 85.2 short tons)25 1001: 79.6 t (78.3 long tons; 87.7 short tons)Service weight25 001: 86.1 t (84.7 long tons; 94.9 short tons)25 1001: 89.0 t (87.6 long tons; 98.1 short tons)Tender type25 001: 2′2′ T 30(as 25 1002: 2′2 T 28 Kst)25 1001: 2′2′ T 27.5 (Kst)Fuel type25 001: Hard coal(as 25 1002: brown coal dust25 1001: brown coal dustFuel capacity25 001: 10 t (9.8 long tons; 11 short tons)25 1001: 26 m3 (920 cu ft) – c. 18.5 t (18.2 long tons; 20.4 short tons)Water cap.27.5–30.0 m3 (6,000–6,600 imp gal; 7,300–7,900 US gal)Firebox:• Grate area25 001: 3.87 m2 (41.7 sq ft)25 1001: 3.76 m2 (40.5 sq ft)Boiler:• Tube plates25 001: 4,700 mm (15 ft 5 in)25 1001: 4,350 mm (14 ft 3+1⁄4 in)• Small tubes25 001: 51 mm (2 in), 132 off25 1001: 44.5 mm (1+3⁄4 in), 146 off• Large tubes133 mm (5+1⁄4 in), 35 offBoiler pressure16 bar (16.3 kgf/cm2; 232 psi)Heating surface:• Firebox25 001: 17.5 m2 (188 sq ft)25 1001: 20.0 m2 (215 sq ft)• Tubes25 001: 89.7 m2 (966 sq ft)25 1001: 78.8 m2 (848 sq ft)• Flues25 001: 64.6 m2 (695 sq ft)25 1001: 59.8 m2 (644 sq ft)• Total surface25 001: 171.8 m2 (1,849 sq ft)25 1001: 158.6 m2 (1,707 sq ft)Superheater:• Heating area25 001: 61.0 m2 (657 sq ft)25 1001: 65.0 m2 (700 sq ft)CylindersTwo, outsideCylinder size600 mm × 660 mm (23+5⁄8 in × 26 in)
Specifications
Configuration
• UIC1′D h2
• German25 001: P 45.1725 1001: P 45.18
Gauge1,435 mm (4 ft 8+1⁄2 in)
Leading dia.1,000 mm (3 ft 3+3⁄8 in)
Driver dia.1,600 mm (5 ft 3 in)
Tender wheels1,000 mm (3 ft 3+3⁄8 in)
Wheelbase
• Axle spacing (Asymmetrical)3,100 mm (10 ft 2 in) +2,600 mm (8 ft 6+3⁄8 in) +2,000 mm (6 ft 6+3⁄4 in) +2,000 mm (6 ft 6+3⁄4 in) =
• Engine9,700 mm (31 ft 9+7⁄8 in)
• Tender2′2′ T 30: 5,800 mm (19 ft 3⁄8 in)2′2′ T 27.5 Kst: 6,830 mm (22 ft 4+7⁄8 in)2′2′ T 28 Kst: 5,700 mm (18 ft 8+3⁄8 in)
• Tender bogie1,900 mm (6 ft 2+3⁄4 in)
• incl. tender25 001: 18,765 mm (61 ft 6+3⁄4 in)25 1001: 19,885 mm (65 ft 2+7⁄8 in)
Length
• Over buffers25 001: 22,695 mm (74 ft 5+1⁄2 in)25 1001: 23,835 mm (78 ft 2+3⁄8 in)
Height4,475 mm (14 ft 8+1⁄8 in)
Axle load25 001: 17.6 t (17.3 long tons; 19.4 short tons)25 1001: 18.0 t (17.7 long tons; 19.8 short tons)
Adhesive weight25 001: 70.4 t (69.3 long tons; 77.6 short tons)25 1001: 72.0 t (70.9 long tons; 79.4 short tons)
Empty weight25 001: 77.3 t (76.1 long tons; 85.2 short tons)25 1001: 79.6 t (78.3 long tons; 87.7 short tons)
Service weight25 001: 86.1 t (84.7 long tons; 94.9 short tons)25 1001: 89.0 t (87.6 long tons; 98.1 short tons)
Tender type25 001: 2′2′ T 30(as 25 1002: 2′2 T 28 Kst)25 1001: 2′2′ T 27.5 (Kst)
Fuel type25 001: Hard coal(as 25 1002: brown coal dust25 1001: brown coal dust
Fuel capacity25 001: 10 t (9.8 long tons; 11 short tons)25 1001: 26 m3 (920 cu ft) – c. 18.5 t (18.2 long tons; 20.4 short tons)
Water cap.27.5–30.0 m3 (6,000–6,600 imp gal; 7,300–7,900 US gal)
Firebox
• Grate area25 001: 3.87 m2 (41.7 sq ft)25 1001: 3.76 m2 (40.5 sq ft)
Boiler
• Tube plates25 001: 4,700 mm (15 ft 5 in)25 1001: 4,350 mm (14 ft 3+1⁄4 in)
• Small tubes25 001: 51 mm (2 in), 132 off25 1001: 44.5 mm (1+3⁄4 in), 146 off
• Large tubes133 mm (5+1⁄4 in), 35 off
Boiler pressure16 bar (16.3 kgf/cm2; 232 psi)
Heating surface
• Firebox25 001: 17.5 m2 (188 sq ft)25 1001: 20.0 m2 (215 sq ft)
• Tubes25 001: 89.7 m2 (966 sq ft)25 1001: 78.8 m2 (848 sq ft)
• Flues25 001: 64.6 m2 (695 sq ft)25 1001: 59.8 m2 (644 sq ft)
• Total surface25 001: 171.8 m2 (1,849 sq ft)25 1001: 158.6 m2 (1,707 sq ft)
Superheater
• Heating area25 001: 61.0 m2 (657 sq ft)25 1001: 65.0 m2 (700 sq ft)
CylindersTwo, outside
Cylinder size600 mm × 660 mm (23+5⁄8 in × 26 in)
Performance figuresMaximum speed100 km/h (62 mph)Indicated power2,380 PS (1,750 kW; 2,350 hp)
Performance figures
Maximum speed100 km/h (62 mph)
Indicated power2,380 PS (1,750 kW; 2,350 hp)
CareerOperatorsDeutsche Reichsbahn (GDR)Numbers25 001 (→ 25 1002), 25 1001Retired1967
Career
Numbers25 001 (→ 25 1002), 25 1001
Retired1967