DRG Class 01

DRG Class 01
01 118 at Bahnhofsfest Königstein Pfingsten 2007
Type and origin
Power typeSteam
Builder
Build date1926–1938
Total produced231 + 10 former Class 02s
Specifications
Configuration:
 • Whyte4-6-2
 • UIC2′C1′ h2
 • GermanS 36.20
DriverSecond coupled axle
Gauge1,435 mm (4 ft 8+12 in)
Leading dia.
  • 01 001–101, 233–242: 850 mm (33+12 in)
  • 01 102–232: 1,000 mm (39+38 in)
Driver dia.2,000 mm (78+34 in)
Trailing dia.1,250 mm (49+14 in)
Wheelbase:
 • Axle spacing
(Asymmetrical)
  • 2,200 mm (7 ft 2+58 in) +
  • 1,800 mm (5 ft 10+78 in) +
  • 2,300 mm (7 ft 6+12 in) +
  • 2,300 mm (7 ft 6+12 in) +
  • 3,800 mm (12 ft 5+58 in)=
 • Engine12,400 mm (40 ft 8+14 in)
 • incl. tender20,320 mm (66 ft 8 in)
Length:
 • Over headstocks22,640 mm (74 ft 3+38 in)
 • Over buffers23,940 mm (78 ft 6+12 in)
Height4,550 mm (14 ft 11+18 in)
Axle load19.73–20.1 tonnes (19.42–19.78 long tons; 21.75–22.16 short tons)
Adhesive weight59.2–60.2 tonnes (58.3–59.2 long tons; 65.3–66.4 short tons)
Empty weight99.2–100.1 tonnes (97.6–98.5 long tons; 109.3–110.3 short tons)
Service weight108.9–111.3 tonnes (107.2–109.5 long tons; 120.0–122.7 short tons)
Tender type2′2′T 30/32/34
Fuel typeHard coal
Fuel capacity10 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:
 • Pitch3,100 mm (10 ft 2 in)
 • Tube plates
  • 01 001–076: 5,800 mm (19 ft 38 in)
  • 01 077–232: 6,800 mm (22 ft 3+1116 in)
 • Small tubes
  • 01 001–076: 54 mm (2+18 in), 129 off
  • 01 077–232: 70 mm (2+34 in), 106 off
 • Large tubes
  • 01 001–076: 143 mm (5+58 in), 43 off
  • 01 077–232:171 mm (6+34 in), 24 off
Boiler pressure16 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)
CylindersTwo, 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 gearWalschaerts (Heusinger) with lifting links
Train heatingSteam
Performance figures
Maximum speedforwards: 120 or 130 km/h (75 or 81 mph)
backwards: 50 km/h (31 mph)
Indicated power2,240 PS (1,650 kW; 2,210 hp)
Career
Retired1982
Disposition17 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.