DRG Class 01

Specifications
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
Valve type	Piston Valve
Train heating	Steam
Loco brake	Knorr air brake
Train brakes	Air
Couplers	Screw Link

Type and origin
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

DRG Class 01
DRG Class 01
	01 118 at Bahnhofsfest Königstein Pfingsten 2007
Power type
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
Configuration:;
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
Valve type	Piston Valve
Train heating	Steam
Loco brake	Knorr air brake
Train brakes	Air
Couplers	Screw Link
Maximum speed
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)
Operators
Career
Operators	DR
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.