Prussian T 26
| T 26 (Prussia) DR class 97.0 |
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 Prussian T 26
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| Numbering: | DR 97 001-030 |
| Number: | 35 |
| Manufacturer: | Esslingen , Borsig |
| Year of construction (s): | 1902-1921 |
| Retirement: | 1932 |
| Type : | C1 'n2 (4) |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 10,450 mm (Borsig) 10,300 mm (Esslingen) |
| Service mass: | 59.1 t |
| Friction mass: | 44.0 t |
| Wheel set mass : | 16.6 t |
| Top speed: | 45 km / h (adhesion) 20/15 km / h (rack) |
| Coupling wheel diameter: | 1080 mm |
| Driving wheel diameter: | 1080 mm |
| Rear wheel diameter: | 800 mm |
| Gear system : | Dept |
| Number of cylinders: | 2 + 2 |
| Cylinder diameter: | 470 mm |
| Piston stroke: | 500 mm |
| Cylinder d. Gear drive: | 2 × 420 mm |
| Piston stroke gear drive: | 450 mm |
| Boiler overpressure: | 12 bar |
| Grate area: | 2.11 m² |
| Evaporation heating surface: | 123.36 m² |
The T 26 of the Prussian State Railways were rack and pinion locomotives , the rack and pinion drive of which was designed to run on rails with the Abt rack system .
description
The gear drive consisted of two gear axles, each of which carried two gear wheels with 18 teeth. The coupled gears were driven by two inner cylinders. In addition to the gear drive, the locomotives also had an external friction drive for the track sections on the level. The first three machines were delivered to KED Erfurt by Maschinenfabrik Esslingen in 1902 , the other 32 from 1905 to 1921 by Borsig to KED Erfurt, Mainz , Frankfurt (Main) , Cologne and Kassel . They were used on the routes Ilmenau - Schleusingen , Suhl - Schleusingen (both Erfurt), Boppard - Buchholz (Mainz), Dillenburg - Wallau (Frankfurt), Linz am Rhein - Flammersfeld (Cologne) and Heiligenstadt - Schwebda (Kassel). The locomotives of the Mainz directorate were sometimes also referred to as T 27.
In 1923 there were still 34 machines, which should be designated as 97 001-034. In 1925, 30 more machines were taken over by the Deutsche Reichsbahn and classified as class 97 0 in their numbering plan .
The locomotives were replaced by the Prussian T 16 1 and T 20 , which made cogwheel operation superfluous, and were taken out of service by 1931. Several T 26s were sold to private and industrial railways. Some remained in service until the 1960s after the gear drive was removed.
literature
- Hans Steffan : New cogwheel locomotives . In: Die Lokomotive , 1905, pp. 164–169 ( ANNO - AustriaN Newspapers Online )
- C1 combined cogwheel - tank locomotive, system Abt, type T26 of the royal Prussian and grandiose class. Hessian State Railways. In: Die Lokomotive , 1912, pp. 110–113 ( ANNO - AustriaN Newspapers Online )
Individual evidence
- ^ Karl-Ernst Maedel , Alfred B. Gottwaldt : German steam locomotives. The history of development . Transpress Verlagsgesellschaft mbH, Berlin 1994, ISBN 3-344-70912-7 , p. 141 .