| Bavarian B XI DRG Class 36.7–8 |
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|---|---|---|
| B XI Zwilling (two-cylinder) |
B XI Verbund (compound) |
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| Numbering: | 1201–1239 from 1926: DRG 36 701–708 |
1240–1339 from 1926: DRG 36 751–826 |
| Quantity: | 39 | 100 |
| Manufacturer: | Maffei | Maffei, Krauss |
| Years of Manufacture: | 1892–1893 | 1895–1900 |
| Retirement: | by 1926 | by 1931 |
| Wheel arrangement: | 0-4-0 | |
| Axle arrangement: | 2'B n2 | 2'B n2v |
| Rail gauge: | 1435 mm | |
| Length over buffers: | 159791 / 168852 mm | 16986 mm |
| Wheel base incl. tender: | 128951 / 139702 mm | 14095 mm |
| Service weight: | 50.4 t | 51.0 / 51.53 t |
| Adhesive weight: | 28.5 t | 28.8 / 29.63 t |
| Axle load: | 14.3 t | 14.4 / 14.83 t |
| Top speed: | 90 km/h | |
| Driving wheel diameter: | 1870 mm | |
| Leading wheel diameter: | 1,006 mm | |
| Valve gear: | Walschaerts (Heusinger), outside | |
| No. of cylinders: | 2 | |
| Cylinder bore: | 430 mm | 455/670 mm |
| Piston stroke: | 610 mm | |
| Boiler overpressure: | 12 kg/cm² = 11.77 bar | 13 kg/cm² = 12.75 bar |
| Grate area: | 2.24 m² | 2.26 m² |
| Evaporative heating area: | 116.2 m² | 116.8 m² |
| Tender: | bay 3 T 14.5 bay 2'2' T 18 |
bay 2'2' T 18 |
| Tender service weight: | 36.0 / 43.0 t | 43.0 t |
| Water capacity: | 14.5 / 18.0 m³ | 18.0 m³ |
| Fuel capacity: | 6.0 / 6.5 t coal | 6.5 t coal |
| 1 with bay 3 T 14.5 tender 2 with bay 2'2' T 18 tender 3 from no. 1318 |
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The Class B XI engines of the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn) were built between 1895 and 1900 by the firm of Maffei for deployment in Bavaria. The first delivery comprised 39 vehicles with two-cylinder, saturated steam operation, a further 100 with two-cylinder, compound engines followed in the period up to 1900.
The Deutsche Reichsbahn took over 8 engines from the first batch as Class 36.7, with operating numbers 36 701 to 36 708, and 76 of the second batch, with numbers 36 751 to 36 826.
These steam locomotives were equipped with Bavarian 3 T 12, 3 T 14.5 and 2'2' T 18 tenders. These vehicles were the first locos that were give a four-axle tender.
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