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)
  • G.Bad.St.E.: 344, 345, 371, 736–739
  • DRG 97 201 – 97 204, 97 251 – 97 253
Quantity7
ManufacturerMaschinenfabrik Esslingen
Year(s) of manufacture1910 (4), 1921 (3)
Retiredmid-1930s
Wheel arrangement0-6-2T
Axle arrangementC1′ n2(4v)zt
Track gauge1,435 mm (4 ft 8 12 in)
Length over buffers10.900 m (35 ft 9 14 in)
Height4,248 mm (13 ft 11 14 in)
Overall wheelbase5,050 mm (16 ft 6 34 in)
Empty weight45.3–45.6 tonnes (44.6–44.9 long tons; 49.9–50.3 short tons)
Service weight56.7–57.0 tonnes (55.8–56.1 long tons; 62.5–62.8 short tons)
Adhesive weight42.8 tonnes (42.1 long tons; 47.2 short tons)
Axle load14.3 tonnes (14.1 long tons; 15.8 short tons)
Top speed
  • Adhesion: 45 km/h (28 mph)
  • Rack: 18 km/h (11 mph)
Driving wheel diameter1,080 mm (3 ft 6 12 in)
Trailing wheel diameter850 mm (2 ft 9 12 in)
Rack systemRiggenbach rack system
Valve gearWalschaerts (Heusinger)
No. of cylinders4
Cylinder bore450 mm (17 1116 in)
Piston stroke550 mm (21 58 in)
Cogwheel drive cylinder bore450 mm (17 1116 in)
Cogwheel drive piston stroke550 mm (21 58 in)
Boiler Overpressure14 kgf/cm2 (1.37 MPa; 199 psi)
No. of heating tubes178
Heating tube length3,200 or 3,850 mm (10 ft 6 in or 12 ft 7 12 in)
Grate area1.8 m2 (19 sq ft)
Radiative heating area8.2 m2 (88 sq ft)
Tube heating area89.43 or 107.5 m2 (962.6 or 1,157.1 sq ft)
Superheater area25.15 m2 (270.7 sq ft)
Evaporative heating area97.59–115.7 m2 (1,050.5–1,245.4 sq ft)
Water capacity5,000 litres (1,100 imp gal; 1,300 US gal)
FuelCoal: 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.

See also

References

    • Lohr, Hermann; Thielmann, Georg (1988). Lokomotiv-Archiv Baden. transpress Berlin. ISBN 3-344-00210-4.
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