Saxon XV HTV
| Saxon XV HTV DRG Class 79 |
|
|---|---|
| Number(s) | 1351 and 1352 79 001 and 79 002 |
| Quantity | 2 |
| Manufacturer | Sächsische Maschinenfabrik, Chemnitz |
| Year(s) of manufacture | 1916 |
| Wheel arrangement | 0-6-6-0 |
| Axle arrangement | C C h4v |
| Type | Pt 66.15 |
| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) |
| Length over buffers | 14,660 mm (48 ft 1 in) |
| Wheelbase | 7,500 mm (24 ft 7 in) |
| Overall wheelbase | 11,100 mm (36 ft 5 in) |
| Minimum curve | 170 m |
| Empty weight | 74.6 t |
| Service weight | 92.2 t |
| Adhesive weight | 92.2 t |
| Axle load | 15.37 t |
| Top speed | 70 km/h (43 mph) |
| Coupled wheel diameter | 1,400 mm (4 ft 7 in) |
| Valve gear | Walschaerts (Heusinger) |
| No. of cylinders | 4 |
| LP cylinder bore | 680 mm (27 in) |
| HP cylinder bore | 440 mm (17 in) |
| Piston stroke | 630 mm (25 in) |
| Boiler Overpressure | 15 bar |
| No. of heating tubes | 124 |
| Heating tube length | 4,500 mm (14 ft 9 in) |
| Grate area | 2.5 m2 (27 sq ft) |
| Radiative heating area | 11.29 m2 (121.5 sq ft) |
| Tube heating area | 78.90 m2 (849.3 sq ft) |
| Superheater area | 40.9 m2 (440 sq ft) |
| Evaporative heating area | 127.20 m2 (1,369.2 sq ft) |
| Water capacity | 8.5 m3 (1,900 imp gal) |
| Fuel | 2.2 t coal |
| Auxiliary brake | Counterweight brake |
| Locomotive brakes | Knorr compressed-air brake |
The Saxon Class XV T was a class of goods train steam locomotive operated by the Royal Saxon State Railways, which had been conceived for hauling trains and acting as banking engines for routes in the Ore Mountains. In 1925 the Deutsche Reichsbahn grouped them into their DRG Class 79.0.
The two locomotives were built in 1916 at the Sächsischen Maschinenfabrik, formerly Hartmann.
The undercarriage of the locomotives was unusual. Instead of an alternative proposal for a twelve-coupled locomotive with sideways-sliding Gölsdorf axles, as was realised a year later in the shape of the Württemberg K, the Saxon Railways decided on a proposal by their head of the engineering department, Lindner, for a design that was unique in Germany: the Saxon XV HTV was given two, fixed, six-coupled drives. This was mainly because they had doubts about the suitability of the Gölsdorf system for twelve-couplers. The outside axles were designed as Klien-Lindner axles and could be slid sideways by about 37 mm from their centre position. The design of these axles required them to be fixed into an outside frame. In the centre of the locomotive was a double cylinder on each side, each with a high-pressure cylinder for the rear and a low-pressure cylinder for the front drive.
...
Wikipedia