Bavarian B I

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Bavarian B I
Year(s) of manufacture 1847ff.
Retired 1896
Wheel arrangement 2-4-0
Axle arrangement 1B n2
Track gauge 1,435 mm (4 ft 8 12 in)
Length over buffers 12,585/13,670 mm
Service weight 24.8/26.0 t
Adhesive weight 17.1/17.4 t
Axle load 8.5/8.7 t
Top speed 65 km/h
Driving wheel diameter 1,372/1,400 mm
Leading wheel diameter 915 mm
No. of cylinders 2
Cylinder bore 381 mm
Piston stroke 610 mm
Boiler Overpressure 6/8 bar
Grate area 0.86/0.93 m2
Evaporative heating area 79.90/74.50 m2
Tender 3 T 4.2/5
Water capacity 4.2/5.0 m3

Bavarian B I engines were 2-4-0 steam locomotives of the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn).

The Class B I was developed in parallel with the Class A II, but had a coupled axle instead of a second carrying axle. As a result, it developed a higher tractive effort. It also had a Stephenson Long Boiler, forked frame and an outside Stephenson valve gear with outside cylinders. The coupling rods were based on an American prototype. Later many of the engines were fitted with a Crampton boiler.

They were coupled to 3 T 4.2, and later 3 T 5, tenders.

See also[edit]