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.
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
Service weight	21.8 t
Top speed	50 km/h
Driving wheel diameter	1,425 mm
Leading wheel diameter	915 mm
Trailing wheel diameter	915 mm
No. of cylinders	2
Cylinder bore	356 mm
Piston stroke	559 mm
Boiler Overpressure	6 bar
Grate area	0.98 m^2
Evaporative heating area	60.81 m^2
Tender	2 T 4,2/5
Water capacity	4.2/5.0 m^3

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

• List of Bavarian locomotives and railbuses