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
Number(s)Names and inventory nos.
Quantity4
ManufacturerMaffei
Year(s) of manufacture1851-1852
Retiredby 1871 (converted)
Wheel arrangement2-2-2
Axle arrangement1A1 n2
Track gauge1,435 mm (4 ft 8 12 in)
Length over buffers11,290 mm (37 ft 12 in)
Service weight21.8 t (21.5 long tons; 24.0 short tons)
Top speed50 km/h (31 mph)
Driving wheel diameter1,425 mm (4 ft 8 18 in)
Leading wheel diameter915 mm (3 ft 0 in)
Trailing wheel diameter915 mm (3 ft 0 in)
No. of cylinders2
Cylinder bore356 mm (14 in)
Piston stroke559 mm (22 in)
Boiler Overpressure6 kgf/cm2 (588 kPa; 85.3 lbf/in2)
Grate area0.98 m2 (10.5 sq ft)
Evaporative heating area60.81 m2 (654.6 sq ft)
Tender2 T 4,2 or 2 T 5
Water capacity4.2 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.

See also

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