DRG Class 01

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DRG Class 01
01 118 at Bahnhofsfest Königstein Pfingsten 2007
Type and origin Power type Steam Builder AEG (12), Berliner Maschinenbau (29), Borsig (18), Henschel & Sohn (122), Hohenzollern (12), Krupp (38) Build date 1926–1938 Total produced 231 + 10 former Class 02s
Specifications Configuration: ​  • Whyte 4-6-2  • UIC 2′C1′ h2  • German S 36.20 Driver Second coupled axle Gauge 1,435 mm (4 ft 8+1⁄2 in) Leading dia. 01 001–101, 233–242: 850 mm (33+1⁄2 in) 01 102–232: 1,000 mm (39+3⁄8 in) Driver dia. 2,000 mm (78+3⁄4 in) Trailing dia. 1,250 mm (49+1⁄4 in) Wheelbase: ​  • Axle spacing (Asymmetrical) 2,200 mm (7 ft 2+5⁄8 in) + 1,800 mm (5 ft 10+7⁄8 in) + 2,300 mm (7 ft 6+1⁄2 in) + 2,300 mm (7 ft 6+1⁄2 in) + 3,800 mm (12 ft 5+5⁄8 in)=  • Engine 12,400 mm (40 ft 8+1⁄4 in)  • incl. tender 20,320 mm (66 ft 8 in) Length: ​  • Over headstocks 22,640 mm (74 ft 3+3⁄8 in)  • Over buffers 23,940 mm (78 ft 6+1⁄2 in) Height 4,550 mm (14 ft 11+1⁄8 in) Axle load 19.73–20.1 tonnes (19.42–19.78 long tons; 21.75–22.16 short tons) Adhesive weight 59.2–60.2 tonnes (58.3–59.2 long tons; 65.3–66.4 short tons) Empty weight 99.2–100.1 tonnes (97.6–98.5 long tons; 109.3–110.3 short tons) Service weight 108.9–111.3 tonnes (107.2–109.5 long tons; 120.0–122.7 short tons) Tender type 2′2′T 30/32/34 Fuel type Hard coal Fuel capacity 10 tonnes (9.8 long tons; 11 short tons) Water cap. 30 or 32 or 34 m3 (6,600 or 7,000 or 7,500 imp gal; 7,900 or 8,500 or 9,000 US gal) Firebox: ​  • Grate area 01 001–149, 233–242: 4.41 m2 (47.5 sq ft) 01 150–232: 4.32 m2 (46.5 sq ft) Boiler: ​  • Pitch 3,100 mm (10 ft 2 in)  • Tube plates 01 001–076: 5,800 mm (19 ft 3⁄8 in) 01 077–232: 6,800 mm (22 ft 3+11⁄16 in)  • Small tubes 01 001–076: 54 mm (2+1⁄8 in), 129 off 01 077–232: 70 mm (2+3⁄4 in), 106 off  • Large tubes 01 001–076: 143 mm (5+5⁄8 in), 43 off 01 077–232:171 mm (6+3⁄4 in), 24 off Boiler pressure 16 bar (16.3 kgf/cm2; 232 psi) Heating surface: ​  • Firebox 01 001–149: 17.00 m2 (183.0 sq ft) 01 150–232: 16.90 m2 (181.9 sq ft)  • Tubes 01 001–076, 233–242: 115.18 m2 (1,239.8 sq ft) 01 077–232: 147.19 m2 (1,584.3 sq ft)  • Flues 01 001–076, 233–242: 105.38 m2 (1,134.3 sq ft) 01 077–232: 83.06 m2 (894.1 sq ft)  • Total surface 01 001–076, 233–242: 237.56 m2 (2,557.1 sq ft) 01 077–149: 247.25 m2 (2,661.4 sq ft) 01 150–232: 247.15 m2 (2,660.3 sq ft) Superheater: ​  • Heating area 01 001–076, 233–242: 100.00 m2 (1,076.4 sq ft) 01 077–232: 85.00 m2 (914.9 sq ft) Cylinders Two, outside Cylinder size 01 001–010: 650 mm × 660 mm (25.59 in × 25.98 in) 01 012–232: 600 mm × 660 mm (23.62 in × 25.98 in) Valve gear Walschaerts (Heusinger) with lifting links Train heating Steam
Performance figures Maximum speed forwards: 120 or 130 km/h (75 or 81 mph) backwards: 50 km/h (31 mph) Indicated power 2,240 PS (1,650 kW; 2,210 hp)
Career Retired 1982 Disposition 17 Preserved, remainder scrapped

The Deutsche Reichsbahn-Gesellschaft's BR 01 steam locomotives were the first standardised (Einheitsdampflokomotive) steam express passenger locomotives built by the unified German railway system. They were of 4-6-2 "Pacific" wheel arrangement in the Whyte notation, or 2′C1′ h2 in the UIC classification. The idea of standardisation was that it would reduce maintenance costs; i.e. if a BR 01 whose engine shop was in, say, Berlin broke down in Dresden, instead of having to ship the necessary part from Berlin and take the locomotive out of service, a part from the Dresden shop could be used as all of the engines, parts, and workings were exactly the same and produced nationwide. Thus it was a "standard" product for engine shops.