Bavarian B IV

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: • Firebox1.30 m² (14.0 sq ft) • Evaporative98.8–101.2 m² (1,063–1,089 sq ft)Cylinders2Cylinder size406 mm (16 in)Piston stroke610 mm (24 in)

Performance figures
Maximum speed	70 km/h (43 mph)

Career
Retired	1881

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

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.