Prussian S 9
| S 8, S 9 (Prussia) DR series 14.0 NMBS / SNCB series 69 |
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 Prussian S 9
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| Numbering: | DR 14 001, 002, 031 NMBS / SNCB 6901-6917 |
| Number: | 99, including 2 "S8" |
| Manufacturer: | Hanomag |
| Year of construction (s): | 1908ff. |
| Retirement: | 1926 (Germany) 1948 (Belgium) |
| Type : | S 8: 2'B1 'h4v S 9: 2'B1' n4v |
| Genre : | S 8: S 2/5 h4v S 9: S 2/5 n4v |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 21,860 mm |
| Length: | 13,110 mm (without tender) |
| Total wheelbase: | 10,750 mm |
| Empty mass: | 68.0 t |
| Service mass: | 74.7 t |
| Friction mass: | 33.0 t |
| Wheel set mass : | 16.5 t |
| Top speed: | 110 km / h |
| Coupling wheel diameter: | 1,980 mm |
| Impeller diameter front: | 1,000 mm |
| Rear wheel diameter: | 1,250 mm |
| Number of cylinders: | 4th |
| HD cylinder diameter: | 380 mm |
| LP cylinder diameter: | 580 mm |
| Piston stroke: | 600 mm |
| Boiler overpressure: | 14 bar |
| Number of heating pipes: | 272 |
| Heating pipe length: | 5,200 mm |
| Grate area: | 4.00 m² |
| Radiant heating surface: | 14.10 m² |
| Tubular heating surface: | 222.00 m² |
| Evaporation heating surface: | S 8: 229.71 m², S 9: 182.54 m² |
| Tender: | pr 2'2 'T 21.5 / 30 / 31.5 |
| Water supply: | 21.5 / 30.0 / 31.5 m³ |
The class S 9 of the Prussian State Railways was an express train steam locomotive with the wheel arrangement 2'B1 '(" Atlantic ") and a four-cylinder compound steam engine . It was developed by the Hanomag company in Hanover and was delivered from 1908 with a total of 99 copies.
The Prussian S 9 Altona 561 and Altona 562 high-speed experimental locomotives, also designated as S 9, do not belong to this class.
Although superheated steam technology was already widespread at this point in time , the state of Prussia wanted Hanomag to deliver wet steam locomotives again. The locomotives procured had a very powerful boiler and, at 4 m², the largest grate area of all Prussian steam locomotives. However, the amount of steam generated was greater than the high pressure cylinders could handle. The performance of the S 9 was therefore barely higher than that of the much smaller S 6 superheated steam locomotive . The S 9 initially formed the backbone of the Berlin – Hanover express train service . Like all German Atlantic locomotives, the S 9 quickly proved to be too weak for the increasingly heavy trains.
Two locomotives (Hannover 903 and 905) were equipped with superheated steam boilers in 1913 and 1914 and designated as S 8 .
After 1919, 17 locomotives had to be handed over to Belgium and four to France . Only three of the locomotives, including the two S 8s and a wet steam engine, were still taken over by the Deutsche Reichsbahn as class 14.0 . The two S 8s were given the numbers 14 001 and 14 002; the S 9 (Essen 907) number 14 031. The locomotives were retired as early as 1926.
On the other hand, the locomotives delivered to Belgium remained in service for much longer. In the 1920s, the NMBS / SNCB converted the locomotives it had taken over under the serial number 69 to superheated steam and modernized them. The last copies were not taken out of service until after World War II in 1948.
The locomotives were with Tender senders equipped of types pr 2'2 'T 21.5, pr 2'2' T 30 and pr 2'2 'T 31.5.
literature
- Lothar Spielhoff: Länderbahn steam locomotives. Volume 1. Prussia, Mecklenburg, Oldenburg, Saxony and Alsace-Lorraine . In: German Railways . Franckh-Kosmos Verlag, Stuttgart 1990, ISBN 3-89350-819-8 , p. 48 .
- Horst J. Obermayer: Steam locomotives . In: German Railways . Franckh-Kosmos Verlag, Stuttgart 1990, ISBN 3-89350-819-8 , p. 47 .
Web links
- Hanomag advertising poster about the Prussian S9 on the Joachim Schmidt Railway Foundation
Individual evidence
- ↑ happysongs151: Etat Belge 6913. July 14, 2017, accessed April 15, 2019 .
- ↑ Forums LR PRESS • Voir le sujet - Atlantic 221 - the stars of the Belle Époque. Retrieved November 4, 2017 (French).
- ↑ Heribert Schröpfer: The (too) late masterpiece. From the last soaring flight of the Atlantic locomotive, part 2: series 12 of the SNCB , in: Eisenbahngeschichte 67, December 2014 / January 2015, pp. 64–69
- ^ Les locomotives «Armistice» , accessed on December 13, 2014