| Bavarian B IV | |
|---|---|
| Quantity: | 10 |
| Manufacturer: | Hartmann, Kessler |
| Year(s) of manufacture: | 1852–1853 |
| Retired: | 1881 |
| Wheel arrangement: | 2-4-0 |
| Axle arrangement: | 1B n2 |
| Gauge: | 1,435 mm |
| Length over buffers: | 13,639 mm |
| Service weight: | 28.0 t |
| Adhesive weight: | 20.5 t |
| Axle load: | 10.3 t |
| Top speed: | 70 km/h |
| Driving wheel diameter: | 1,524 mm |
| Leading wheel diameter: | 915 mm |
| No. of cylinders: | 2 |
| Cylinder bore: | 406 mm |
| Piston stroke: | 610 mm |
| Boiler Overpressure: | 7 bar |
| Grate area: | 1.30 m² |
| Evaporative heating area: | 98.8–101.2 m² |
| Tender: | 3 T 5 |
| Water capacity: | 5.0 m³ |
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.
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