Bavarian B IX (Ostbahn)
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| Bavarian B IX | |||
|---|---|---|---|
| Number(s): | 1081–1092 | 1069–1080 | |
| Quantity: | 12 | 12 | |
| Manufacturer: | Keßler, Maffei | Maffei | |
| Year(s) of manufacture: | 1857–1858 | 1859ff. | |
| Retired: | 1926 | 1903 | |
| Wheel arrangement (Whyte): | 4-2-0 | 2-2-2 | |
| Axle arrangement (UIC): | 2A n2 | 1A1 n2 | |
| Track gauge: | 1,435 mm (4 ft 8+1⁄2 in) | ||
| Length over buffers: | 13,710 mm (44 ft 11+3⁄4 in) | 11,850 mm (38 ft 10+1⁄2 in) | |
| Service weight: | 25.9 t (25.5 long tons; 28.5 short tons) | ||
| Adhesive weight: | 10.5 t (10.3 long tons; 11.6 short tons) | ||
| Top speed: | 90 km/h (56 mph) | ||
| Driving wheel diameter: | 1,828 mm (6 ft 0 in) | ||
| Leading wheel diameter: | 1,220 mm (4 ft 0 in) | ||
| Trailing wheel diameter: | — | 1,220 mm (4 ft 0 in) | |
| No. of cylinders: | Two | ||
| Cylinder bore: | 394 mm (15+1⁄2 in) | ||
| Piston stroke: | 610 mm (24 in) | ||
| Boiler overpressure: | 6 kgf/cm2 (590 kPa; 85 lbf/in2) | ||
| Grate area: | 1.13 m2 (12.2 sq ft) | 1.12 m2 (12.1 sq ft) | |
| Evaporative heating area: | 83.20 m2 (895.6 sq ft) | 80.00 m2 (861.1 sq ft) | |
| Tender: | 3 T 7 | ||
| Water capacity: | 7.0 m3 (1,500 imp gal; 1,800 US gal) | ||
The Bavarian Class A, later B IX were German steam locomotives with the Bavarian Eastern Railway (Bayerische Ostbahn).
The engines had an external frame with outside drive and valve gear. They had the smallest wheel diameter (1,828 mm) of any locomotive of this type in the whole of Germany. Between 1869 and 1871 all the engines were rebuilt in Regensburg and were given a 1 B axle arrangement. They were then given locomotive numbers 1081–1092.[citation needed]
