DRG Class 01

Specifications
Specifications
Configuration:;
• Whyte	4-6-2
• UIC	2′C1′ h2
• German	S 36.20
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 m (74 ft 3+3⁄8 in)
• Over buffers	23.940 m (78 ft 6+1⁄2 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:;
• 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

Type and origin
Type and origin
Power type	Steam
Builder	AEG,; Berliner Maschinenbau,; Borsig,; Henschel & Sohn,; Hohenzollern,; Krupp;
Build date	1926–1938
Total produced	231 + 10 former Class 02s

DRG Class 01
DRG Class 01
	01 118 at Bahnhofsfest Königstein Pfingsten 2007
Power type
Type and origin
Power type	Steam
Builder	AEG,; Berliner Maschinenbau,; Borsig,; Henschel & Sohn,; Hohenzollern,; Krupp;
Build date	1926–1938
Total produced	231 + 10 former Class 02s
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-2
• UIC	2′C1′ h2
• German	S 36.20
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 m (74 ft 3+3⁄8 in)
• Over buffers	23.940 m (78 ft 6+1⁄2 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:;
• 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
Maximum speed
Performance figures
Maximum speed	forwards: 120 or 130 km/h (75 or 81 mph); backwards: 50 km/h (31 mph)
Indicated power	1,648 kW (2,210 hp)
Retired
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.

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