| Ok1 | |
|---|---|
| Ok1-359 in Wolsztyn | |
| Power type | Steam |
| Builder | Schwartzkopff Linke-Hofmann |
| Build date | 1908–1928 |
| Configuration | 4-6-0 |
| UIC classification | 2′C h2 |
| Gauge | 1,435 mm (4 ft 8 1⁄2 in) |
| Leading wheel diameter |
1,000 mm (3 ft 3 3⁄8 in) |
| Driver diameter | 1.75 m (5 ft 8 7⁄8 in) |
| Length | 18,585 mm (61 ft 0 in) |
| Height | 4.550 m (14 ft 11 in) |
| Axle load | 16.6–17.3 tonnes (16.3–17.0 long tons; 18.3–19.1 short tons) |
| Weight on drivers | 50.6 tonnes (49.8 long tons; 55.8 short tons) |
| Locomotive weight | 78.2 tonnes (77.0 long tons; 86.2 short tons) |
| Fuel capacity | 7.0 tonnes (6.9 long tons; 7.7 short tons) |
| Boiler pressure | 1.2 MPa (170 lbf/in²) |
| Firegrate area | 14.28 m2 (153.7 sq ft) |
| Heating surface: Firebox |
2.64 m2 (28.4 sq ft) |
| Cylinder size | 575 × 630 mm (22.6 × 24.8 in) |
| Career | PKP |
| Class | Ok1 |
Ok1 is the Polish designation of a Prussian steam locomotive, the Prussian P 8, used on Polish State Railways. After the end of World War I, 190 Class P 8 engines were handed over as a reparation to Poland, where they were re-designated as Class OK1 locomotives. Production of the P 8 lasted from 1908 until 1928 and this locomotive was used on practically all European railway lines.
In Poland, the engine was used from 1918, and after World War II the Ok1 was the most numerous passenger locomotive in the country. It was used until the late 1970s. A few engines were preserved, including Ok1-359 (see the photograph), which is stabled at the Wolsztyn museum.
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