• Source: Prussian G 9

The Prussian G 9 was the last saturated (i.e non-superheated) locomotive class developed for the Prussian state railways. A total of 200 were put into service between 1908 and 1911, first by Schichau, and later by other locomotive manufacturers. Since problems arose with the G 8, the superheated steam technology was not really trusted. The chassis was taken from the G 7, whereas the larger boiler was a new design. The G 9 remained inferior to the G 8 in terms of performance. At first a number of locomotives were referred to as G 7, but they were later reclassified G 9. They mainly operated in ore traffic between the Ruhr area and the North Sea.
After World War I, 58 locomotives were ceded to Belgium (type 79), eight to Poland for the Polish State Railways (PKP), who classified them as Tp5, and one locomotive to the Saarland.
133 locomotives passed to Deutsche Reichsbahn and were given the fleet numbers 55 2301 to 55 2433. Thirty-six of them were fitted with superheaters in the 1920s, which led to an increase in performance and speed. The locomotives that survived World War II were either retired (in the western zones by 1949, in East Germany as the last in 1961, 55 2361) or sold to private railways.
After 1945, the ČSD had two locomotives. They were designated as series 427.05. They originally came from Poland, part of PKP's Tp5 series. In 1947 they were returned to the PKP.
The locomotives were equipped with a Prussian 3-axle tender, type pr 3 T 12, to diagram sheet III-5b.




References



Hütter, Ingo (2015). Die Dampflokomotiven der Baureihen 54 bis 59 der DRG, DRB, DB, und DR (in German). Werl: DGEG Medien. pp. 142–146. ISBN 978-3-937189-85-7.
Obermayer, Horst J. (1981). Taschenbuch Deutsche Dampflokomotiven (in German). Stuttgart: Franckh'sche Verlagshandlung. ISBN 3-440-03643-X.
Rauter, Herbert; Weisbrod, Manfred (1992). Preußen-Report Band 5 (in German). Fürstenfeldbruck: Hermann Merker Verlag. ISBN 3-922404-22-7.
Vandenberghen, J (1989). La guerre 1914 - 1918 et les locomotives "Armistice", 2. Description des locomotives K.P.E.V. (PDF) (in French). Brussels: SNCB. pp. 259–266.
Wagner, Andreas; Bäzold, Dieter; Zschech, Rainer; Lüderitz, Ralph (1990). Lokomotiven preußischer Eisenbahnen, Güterzuglokomotiven (EFA 2.3.2) (in German). Düsseldorf: Alba. pp. 165–170. ISBN 3-87094-134-0.
Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1978). Dampflokomotiven deutscher Eisenbahnen, Baureihe 41–59 (EFA 1.2) (in German) (3rd ed.). Düsseldorf: Alba. pp. 120–123. ISBN 3-87094-082-4.

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