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
Gauge: 1,435 mm
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.

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