Bavarian B IV

Bavarian B IVs were early German steam locomotives with the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn).

Bavarian B IV
Type and origin
Builder
Build date1852–1853
Total produced10
Specifications
Configuration:
​
 • Whyte2-4-0
Gauge1,435 mm (4 ft 8+1⁄2 in)
Leading dia.915 mm (3 ft 0 in)
Driver dia.1,524 mm (5 ft 0 in)
Length:
​
 • Over beams13,639 mm (44 ft 9 in)
Axle load10.3 t (10.1 long tons; 11.4 short tons)
Adhesive weight20.5 t (20.2 long tons; 22.6 short tons)
Service weight28.0 t (27.6 long tons; 30.9 short tons)
Water cap.5.0 m3 (1,100 imp gal; 1,300 US gal)
Boiler pressure7 kgf/cm2 (686 kPa; 99.6 lbf/in2)
Heating surface:
 • Firebox		1.30 m2 (14.0 sq ft)
 • Evaporative98.8–101.2 m2 (1,063–1,089 sq ft)
Cylinders2
Cylinder size406 mm (16 in)
Piston stroke610 mm (24 in)
Performance figures
Maximum speed70 km/h (43 mph)
Career
Retired1881

The six engines built by Kessler were trialled with a Kessler boiler. This had a pear-shaped cross section and could therefore be set lower down between the wheels. The same effect was also attempted on the machines from Hartmann by using two boilers: a lower boiler with a small diameter and a larger, upper boiler. After two boiler explosions occurred, all the engines were equipped with normal boilers. All the vehicles had a steam dome in the centre, and the overhanging outer firebox had a flat top on which there was a safety valve and a pump (Fahrpumpe) driven by the crossheads.

They had Bavarian 3 T 5 tenders.

See also
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