Baden IX b
The Baden Class IX b were German rack railway steam locomotives with the Grand Duchy of Baden State Railways, whose cogwheel drive was designed for running on track with a Riggenbach rack system.
| Baden IX b DRG Class 97.2 | |
|---|---|
 Baden 371 (Maschinenfabrik Esslingen 3546 of 1910) | |
| Number(s) | DRG 97 201–204, 251–253 |
| Quantity | 7 |
| Manufacturer | Maschinenfabrik Esslingen |
| Year(s) of manufacture | 1910 (4), 1921 (3) |
| Retired | mid-1930s |
| Wheel arrangement | 0-6-2T |
| Axle arrangement | C1′ n2(4v)zt |
| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) |
| Length over buffers | 10.900 m (35 ft 9 1⁄4 in) |
| Height | 4,248 mm (13 ft 11 1⁄4 in) |
| Overall wheelbase | 5,050 mm (16 ft 6 3⁄4 in) |
| Empty weight | 45.3–45.6 tonnes (44.6–44.9 long tons; 49.9–50.3 short tons) |
| Service weight | 56.7–57.0 tonnes (55.8–56.1 long tons; 62.5–62.8 short tons) |
| Adhesive weight | 42.8 tonnes (42.1 long tons; 47.2 short tons) |
| Axle load | 14.3 tonnes (14.1 long tons; 15.8 short tons) |
| Top speed |
|
| Driving wheel diameter | 1,080 mm (3 ft 6 1⁄2 in) |
| Trailing wheel diameter | 850 mm (2 ft 9 1⁄2 in) |
| Rack system | Riggenbach rack system |
| Valve gear | Heusinger (Walschaerts) |
| No. of cylinders | 4 |
| Cylinder bore | 450 mm (17 11⁄16 in) |
| Piston stroke | 550 mm (21 5⁄8 in) |
| Cogwheel drive cylinder bore | 450 mm (17 11⁄16 in) |
| Cogwheel drive piston stroke | 550 mm (21 5⁄8 in) |
| Boiler Overpressure | 14 bar (1.40 MPa; 203 psi) |
| No. of heating tubes | 178 |
| Heating tube length | 3,200 or 3,850 mm (10 ft 6 in or 12 ft 7 1⁄2 in) |
| Grate area | 1.8 m2 (19 sq ft) |
| Radiative heating area | 8.2 m2 (88 sq ft) |
| Tube heating area | 89.43 or 107.5 m2 (962.6 or 1,157.1 sq ft) |
| Superheater area | 25.15 m2 (270.7 sq ft) |
| Evaporative heating area | 97.59–115.7 m2 (1,050.5–1,245.4 sq ft) |
| Water capacity | 5,000 litres (1,100 imp gal; 1,300 US gal) |
| Fuel | Coal: 1.5 tonnes (1.5 long tons; 1.7 short tons) |
The locomotive was produced in two sub-classes, which were designated as IX b1 and IX b2. In 1925 they were grouped by the Deutsche Reichsbahn as DRG Class 97.2 within their renumbering plan. The engines were employed on the Höllentalbahn in the Black Forest until they were eventually and later replaced by DRG Class 85 locomotives.
References
- Lohr, Hermann; Thielmann, Georg (1988). Lokomotiv-Archiv Baden. transpress Berlin. ISBN 3-344-00210-4.
| Early locomotives |
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| Passenger and express train locomotives | ||
| Goods train locomotives |
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| Tank locomotives | ||
| Narrow gauge and electric locomotives and railbuses |
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Grand Duchy of Baden State Railways | ||
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