Bavarian B IV

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

Bavarian B IV
Quantity	10
Manufacturer	Hartmann (4) Kessler (6)
Year(s) of manufacture	1852–1853
Retired	1881
Wheel arrangement	2-4-0
Axle arrangement	1B n2
Track gauge	1,435 mm (4 ft 8 ^1⁄2 in)
Length over buffers	13,639 mm (44 ft 9 in)
Service weight	28.0 t (27.6 long tons; 30.9 short tons)
Adhesive weight	20.5 t (20.2 long tons; 22.6 short tons)
Axle load	10.3 t (10.1 long tons; 11.4 short tons)
Top speed	70 km/h (43 mph)
Driving wheel diameter	1,524 mm (5 ft 0 in)
Leading wheel diameter	915 mm (3 ft 0 in)
No. of cylinders	2
Cylinder bore	406 mm (16 in)
Piston stroke	610 mm (24 in)
Boiler Overpressure	7 kgf/cm^2 (686 kPa; 99.6 lbf/in^2)
Grate area	1.30 m^2 (14.0 sq ft)
Evaporative heating area	98.8–101.2 m^2 (1,063–1,089 sq ft)
Tender	3 T 5
Water capacity	5.0 m^3 (1,100 imp gal; 1,300 US gal)

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

• List of Bavarian locomotives and railbuses

External links

• Railways of Germany forum