Saxon IV
| Saxon IV DR class 55.60 |
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 Saxon IV
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| Numbering: | IV 1251-1280 DR 55 6001-6013 |
| Number: | 30th |
| Manufacturer: | Saxon machine factory , Chemnitz |
| Year of construction (s): | 1898-1903 |
| Retirement: | 1927 |
| Axis formula : | B'B n4v |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 16,756 mm |
| Service mass: | 588.4 kN |
| Friction mass: | 588.4 kN |
| Wheel set mass : | 148.1 kN |
| Top speed: | 45 km / h |
| Driving wheel diameter: | 1,260 mm |
| Number of cylinders: | 2 |
| HD cylinder diameter: | 420 mm |
| LP cylinder diameter: | 650 mm |
| Piston stroke: | 600 mm |
| Boiler overpressure: | 12 bar |
| Grate area: | 2.08 m² |
| Evaporation heating surface: | 141.10 m² |
| Tender: | sä 3 T 12 |
The Saxon Class I were locomotives with a tender of the Royal Saxon State Railways of the Mallet type for freight train service .
Despite previous failures in Baden , Bavaria and Prussia with articulated locomotives of the Mallet type, the Hartmann company built 30 units for the Royal Saxon State Railways between 1898 and 1903 .
The same defects soon arose as had been found in other vehicles of this type. Due to the split engine, the frictional mass could not be fully exploited, and the machines also tended to skid quite strongly when starting up.
The Deutsche Reichsbahn took over 13 locomotives and gave them the road numbers 55 6001-6013. It was the only type of articulated locomotive with a tender that received new numbers in the 1925 Deutsche Reichsbahn redesignation plan . The locomotives were retired by 1927.
literature
- Erich Preuß , Reiner Preuß : Saxon State Railways . transpress Verlagsgesellschaft, Berlin 1991, ISBN 3-344-70700-0 .