Prussian S 10.1 (1911 Variant)
| Prussian S 10.1 - 1911 variant (Prussia, Alsace-Lorraine) DRG Class 17.10–11 ÖBB Class 617 |
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| Number(s): | DRG 17 1001–1123, 1145–1153 |
| Quantity: | 152 |
| Manufacturer: | Henschel |
| Year(s) of manufacture: | 1911–1914 |
| Retired: | 1963 |
| Wheel arrangement: | 4-6-0 |
| Axle arrangement: | 2'C h4v |
| Gauge: | 1,435 mm |
| Length over buffers: | 21,110 mm |
| Service weight: | 83.1 t |
| Adhesive weight: | 53.2 t |
| Axle load: | 17.8 t |
| Top speed: | 120 km/h |
| Indicated Power: | 1,044 kW |
| Driving wheel diameter: | 1,980 mm |
| Leading wheel diameter: | 1,000 mm |
| No. of cylinders: | 4 |
| Cylinder bore: | 2×400/610 mm |
| Piston stroke: | 660 mm |
| Boiler Overpressure: | 15 bar (1.5 MPa) |
| Grate area: | 3.18 m² |
| Superheater area: | 58.50 m² |
| Evaporative heating area: | 161.22 m² |
| Tender: | pr 2'2' T 21.5/31.5 |
| Water capacity: | 21.5/31.5 m³ |
Even as production started on the S 10, Henschel were given an order for the manufacture of a compound locomotive, which promised to deliver lower coal consumption.
This locomotive, classified as the S 10.1, was not based on the S 10, but was a new design. The four-cylinder compound engine was of the de Glehn type, which meant that the outside cylinders, set well to the rear, drove the second coupled axle and the inside cylinder drove the first. The engines were larger and more powerful than the S 10 and, thanks to their compound engines, also more economical.
Between 1911 and 1914, no less than 135 examples were built for Prussia and 17 for Alsace-Lorraine. Following initial dissatisfaction with the vehicles, several modifications to the locomotives finally led to the desired success. For example, no feedwater preheater was fitted to start with for weight-saving reasons, but one was later installed. The remaining disadvantages, such as the poor accessibility of the inside drive, led to the development of a new version in the shape of the 1914 variant.
After three locomotives were sent abroad as reparations, the Deutsche Reichsbahn took over the remaining 132 vehicles as Class 17.10–11 with numbers 17 1001–1123 and 17 1145–1153.
The three locomotives left in 1945 with the Austrian Federal Railway were renumbered to 617.1004, 617.1089 and 617.1099 and retired in 1957.
The Deutsche Bundesbahn withdrew their last S 10.1 engines in 1952. The Deutsche Reichsbahn in East Germany held onto these locomotives for longer and converted 13 examples to coal-dust firing. Locomotive number 17 1119 was given a condensing tender. In 1963 the last machines were taken out of service by the DR.
Number 17 1055 (formerly "Posen 1107", running as "Osten 1135") was partly returned to its original configuration and belongs today to the Dresden Transport Museum.
The S 10.1s were equipped with tenders of Prussian classes pr 2'2' T 21.5 and pr 2'2' T 31.5.
Read more about this topic: Prussian S 10