Bavarian A III
The Bavarian A III 2-2-2 engines were German steam locomotives in service with the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn).
Bavarian A III | |
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Number(s) | Names and inventory nos. |
Quantity | 4 |
Manufacturer | Maffei |
Year(s) of manufacture | 1851-1852 |
Retired | by 1871 (converted) |
Wheel arrangement | 2-2-2 |
Axle arrangement | 1A1 n2 |
Track gauge | 1,435 mm (4 ft 8 1⁄2 in) |
Length over buffers | 11,290 mm (37 ft 1⁄2 in) |
Service weight | 21.8 t (21.5 long tons; 24.0 short tons) |
Top speed | 50 km/h (31 mph) |
Driving wheel diameter | 1,425 mm (4 ft 8 1⁄8 in) |
Leading wheel diameter | 915 mm (3 ft 0 in) |
Trailing wheel diameter | 915 mm (3 ft 0 in) |
No. of cylinders | 2 |
Cylinder bore | 356 mm (14 in) |
Piston stroke | 559 mm (22 in) |
Boiler Overpressure | 6 kgf/cm2 (588 kPa; 85.3 lbf/in2) |
Grate area | 0.98 m2 (10.5 sq ft) |
Evaporative heating area | 60.81 m2 (654.6 sq ft) |
Tender | 2 T 4,2 or 2 T 5 |
Water capacity | 4.2 or 5.0 m3 (920 or 1,100 imp gal; 1,100 or 1,300 US gal) |
Once again these engines were used to experiment with a short boiler and Meyer expansion valve gear. Because the additional increase in size of the heating area could not be improved by installing extra tubes, two of each were rebuilt to 0-4-2 and 0-6-2 locomotives. Otherwise their construction was the same as the Class A II engines.
They were equipped with 2 T 4.2 and, following the rebuild, 2 T 5 tenders.
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