Bavarian S 3/6
DRG Class 18.4 |
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Bavarian S 3/6, Series a to c |
| Type and origin |
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| Build date | 1908–1931 |
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| Total produced | 159 |
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| Specifications |
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Configuration:
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| • Whyte | 4-6-2 |
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| Gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
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| Leading dia. | 950 mm (37+3⁄8 in) |
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| Driver dia. | 1,870 mm (73+5⁄8 in) |
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| Trailing dia. | 1,206 mm (47+1⁄2 in) |
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Length:
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| • Over beams | 21,396 mm (70 ft 2+1⁄4 in) |
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| Axle load | 16.8 t
(16.5 long tons; 18.5 short tons) |
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| Adhesive weight | 49.6 t
(48.8 long tons; 54.7 short tons) |
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| Service weight | 88.3 t
(86.9 long tons; 97.3 short tons) |
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| Water cap. | 26.2 m3 (5,800 imp gal; 6,900 US gal) |
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| Boiler pressure | 15 kgf/cm2 (1.47 MPa; 213 lbf/in2) |
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| Heating surface: | |
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| • Firebox | 4.53 m2 (48.8 sq ft) |
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| • Evaporative | 197.41 m2 (2,124.9 sq ft) |
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Superheater:
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| • Heating area | 74.16 m2 (798.3 sq ft) |
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| Cylinders | 4, compound |
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| High-pressure cylinder | 425 mm (16+3⁄4 in) |
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| Low-pressure cylinder | 670 mm (26+3⁄8 in) |
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| Piston stroke | - HP: 610 mm (24 in)
- LP: 670 mm (26+3⁄8 in)
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| Performance figures |
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| Maximum speed | 120 km/h (75 mph) |
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| Indicated power | 1,770 PS (1,300 kW; 1,750 hp) |
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| Career |
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| Numbers | - K.Bay.Sts.E.: 3601–3623, 3642–3709
- DRG 18 401 – 18 434, 18 461 – 18 548
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| Retired | by 1969 |
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The Class S 3/6 steam locomotives of the Royal Bavarian State Railways (later Class 18.4-5 of the Deutsche Reichsbahn) were express train locomotives with a 4-6-2 Pacific (Whyte notation) or 2'C1' (UIC classification) wheel arrangement.
Of all the state railway locomotives, these engines are remarkable because they were made over a period of almost 25 years, even during the Deutsche Reichsbahn era. A total of 159 units were manufactured, more than all the other state railway Pacifics taken together. A total of 89 of these locomotives (Series a to i) were built for the Royal Bavarian State Railways and 70 (Series k to o) for the Deutsche Reichsbahn.
