Saxon VII (Hartmann type)
| H VII DR series 98.71 |
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|---|---|
 Saxon VII (Hartmann type) No. 735 Siegfried
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| Numbering: | 98 7111 - 98 7113 (DR) |
| Number: | 22nd |
| Manufacturer: | Hartmann , Chemnitz |
| Year of construction (s): | 1868-1876 |
| Retirement: | until 1925 |
| Type : | B n2 |
| Gauge : | 1435 mm ( standard gauge ) |
| Total wheelbase: | 2600 mm |
| Empty mass: | 23.5 t - 25.0 t |
| Service mass: | 26.3 t - 28.1 t |
| Friction mass: | 26.3 t - 28.1 t |
| Wheel set mass : | 13.2 t - 14.1 t |
| Top speed: | 50 km / h |
| Coupling wheel diameter: | 1380 mm - 1675 mm |
| Cylinder diameter: | 406 mm - 407 mm |
| Piston stroke: | 560 mm |
| Boiler overpressure: | 8.4-9.0 bar |
| Number of heating pipes: | 182/184 |
| Heating pipe length: | 3750 mm - 3767 mm |
| Grate area: | 1.20 m² - 1.24 m² |
| Radiant heating surface: | 7.1 m² - 7.2 m² |
| Tubular heating surface: | 85.6 m² - 86.8 m² |
| Evaporation heating surface: | 92.8 m² - 93.9 m² |
As Genus VII designated Royal Saxon State Railways four-coupled Tender - steam locomotives for the mixed passenger and freight service. The Deutsche Reichsbahn classified the locomotives in the 98.71 series from 1925 .
history
The machines supplied by the Sächsische Maschinenfabrik (formerly Hartmann) in Chemnitz are almost all different from one another. The drive wheels had three different diameters, 1,710, 1,550 and 1,390 mm. What all locomotives had in common, however, was an axle base of 2,600 mm.
The machines were also delivered to the later nationalized railway companies Chemnitz-Komotauer Eisenbahngesellschaft , Chemnitz-Aue-Adorfer Eisenbahngesellschaft and Zwickau-Lengenfeld-Falkensteiner Eisenbahn-Gesellschaft .
In 1925, three machines with a 1,390 mm coupling wheel diameter were taken over from the Deutsche Reichsbahn , but they were retired in the same year.