G.10 (another designation: Tw1) is a series of steam locomotives (steam locomotives) that were produced in the years 1910-1928 by many German companies, including: Henschel, Rheinmetall, Borsig and Hanomag. The length of a single locomotive (with the tender) was 18.91 meters, and the service weight - 76.6 tons, although according to of some sources it reached 86.6 tons. The diameter of the wheels was 1,400 mm. The G.10 steam locomotives were designed as locomotives dedicated to hauling freight trains, also in hilly and mountainous terrain. Occasionally it was used to haul trains. The new locomotive was a kind of combination of several other rail vehicles: the modified chassis was taken over from the T.16 steam locomotive, and the highly efficient and reliable boiler from the P.8 steam locomotive. Finally, after a series of tests and improvements to the prototypes, it turned out to be a successful rail vehicle, and its production significantly exceeded 2600 units. During World War I, they were intensively used, and after its end, the PKP included 85 locomotives of this type. Interestingly, after the end of the next world war, PKP had 141 of them. After 1945, they were still used until the 1970s, but mainly on industrial lines.
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