Baden IX b

Last updated
Baden IX b
DRG Class 97.2
Badische IX b Nr. 371.png
Baden 371 (Maschinenfabrik Esslingen 3546 of 1910)
Type and origin
Builder Maschinenfabrik Esslingen
Build date1910 (4), 1921 (3)
Total produced7
Specifications
Configuration:
   Whyte 0-6-2T
   UIC C1′ n2(4v)zt
Gauge 1,435 mm (4 ft 8+12 in)
Driver dia.1,080 mm (3 ft 6+12 in)
Trailing dia. 850 mm (2 ft 9+12 in)
Wheelbase:
  Overall
5,050 mm (16 ft 6+34 in)
Rack system Riggenbach rack system
Length:
  Over beams10.900 m (35 ft 9+14 in)
Height4,248 mm (13 ft 11+14 in)
Axle load 14.3 tonnes (14.1 long tons; 15.8 short tons)
Adhesive weight 42.8 tonnes (42.1 long tons; 47.2 short tons)
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)
Fuel capacityCoal: 1.5 tonnes (1.5 long tons; 1.7 short tons)
Water cap.5,000 litres (1,100 imp gal; 1,300 US gal)
Boiler:
No. of heating tubes178
Heating tube length3,200 or 3,850 mm (10 ft 6 in or 12 ft 7+12 in)
Boiler pressure14 kgf/cm2 (1.37 MPa; 199 psi)
Heating surface:
  Tubes
89.43 or 107.5 m2 (962.6 or 1,157.1 sq ft)
  Firebox1.8 m2 (19 sq ft)
  Radiative8.2 m2 (88 sq ft)
  Evaporative97.59–115.7 m2 (1,050.5–1,245.4 sq ft)
Superheater:
  Heating area25.15 m2 (270.7 sq ft)
Cylinders 4
Cylinder size 450 mm (17+1116 in)
Piston stroke 550 mm (21+58 in)
Cogwheel drive cylinder bore450 mm (17+1116 in)
Cogwheel drive piston stroke550 mm (21+58 in)
Valve gear Walschaerts (Heusinger)
Performance figures
Maximum speed
  • Adhesion: 45 km/h (28 mph)
  • Rack: 18 km/h (11 mph)
Career
Numbers
  • G.Bad.St.E.: 344, 345, 371, 736–739
  • DRG 97 201 – 97 204, 97 251 – 97 253
Retiredmid-1930s

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.

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

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References