Lenz type J
| Lenz type J, cent | |
|---|---|
 Tx7-3501 (former Saatziger Klb no.51) in the Museum Gryfice (2018)
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| Numbering: |
SKB 51 J , 52 Jh , KKB 51 J , 52 J , RKB 51 J PLB 171-174, 175 * PKP Tx5-3501-3505; Tx7-3501-3505 |
| Number: | 5 |
| Manufacturer: | AG Vulcan Szczecin |
| Year of construction (s): | 1914, 1928 |
| Retirement: | 1973/1974 |
| Axis formula : | D. |
| Type : | D n2t / D h2t * |
| Gauge : | 1000 mm ( meter gauge ) |
| Length over buffers: | 7,724 mm; 8,000 mm * |
| Height: | 3,150 mm; 3,200 mm * |
| Width: | 2,200 mm |
| Total wheelbase: | 3,400 mm, 3450 mm * |
| Empty mass: | 18.5 t; 20.5 t * |
| Service mass: | 23.5 t; 25.5 t * |
| Top speed: | 30 km / h |
| Indexed performance : | 235 PSi / 173 kW |
| Starting tractive effort: | 40.69 kN |
| Coupling wheel diameter: | 850 mm |
| Driving wheel diameter: | 850 mm |
| Control type : | Heusinger with hanging iron, leading counter crank |
| Number of cylinders: | 2 |
| Cylinder diameter: | 350 mm |
| Piston stroke: | 400 mm |
| Boiler overpressure: | 12 bar |
| Grate area: | 0.90 m² |
| Radiant heating surface: | 3.52 m² |
| Superheater area : | 13.03 m² * |
| Evaporation heating surface: | 46.7 m² 33.77 m² |
| Water supply: | 2.2 m³ |
| Fuel supply: | 0.8 tons of coal |
| * Type century | |
The Lenz type J (or Lenz type century for the steam version ) was 1,000 mm narrow gauge - steam locomotives . All five vehicles stayed with the Polish State Railways after the end of World War II and were retired between 1969 and 1974.
history
Initially, only two-axle steam locomotives ( Lenz type i ) were used on the meter-gauge railway lines built and operated by Lenz & Co. in Pomerania . Due to the increased traffic, these were soon too weak, so that Lenz initially procured mallet locomotives of the Lenz type ii series , which, however, as a mallet locomotive, was expensive to maintain.
In 1914, Vulcan delivered four quadruple-coupled locomotives as type J to the Pomeranian Provincial Administration, which in 1910 had taken over operation on the Pomeranian meter-gauge lines from Lenz.
The locomotives were distributed over the individual routes as follows:
As they proved their worth, a locomotive was ordered for the Saatziger Kleinbahn in 1928. In accordance with the state of the art at the time, the machine was, in contrast to the first locomotives, a superheated steam locomotive . It received the new type designation Jh .
On the Pomeranian State Railways they were listed as 171 to 174 N 4406 and 175 H 4406.
After the end of the Second World War , all locomotives were on the eastern part of Germany that fell to Poland . At the PKP they were given the numbers Tx5-3501 to 3505, later Tx7-3501 to 3505, the machines remained in use for a long time, only when traffic on some lines was stopped at the end of the 1960s, the steam locomotives became superfluous and between 1969 and retired in 1974. The machine delivered in 1928 was then erected as a memorial in Dobra (Daber).
The locomotives 51J and 52Jh of the Saatziger Kleinbahnen (PKP Tx7-3501 and 3502) have been preserved as a museum exhibit in the Gryfice narrow-gauge railway museum .
technical features
The vehicles initially only supplied as wet steam locomotives were very similar to the standard-gauge ELNA locomotives built from 1920 and were identical in construction to the type M except for the gauge . The flat water tank above the frame, which made maintenance work on the boiler much easier, is particularly typical of the J type.
After the First World War , Vulcan improved the steam locomotive type to a superheated steam engine. Compared to the wet steam variant, this saves water while increasing performance at the same time. The differences were the forward-moved chimney and the superheater steam box , as well as the use of piston valves instead of flat valves. The new machine also received a ventilation system on the driver's cab.
literature
- Wolfram Bäumer, Siegfried Bufe: Railways in Pomerania. Bufe, Egglham and Munich 1988; ISBN 3-922138-34-9 , pp. 173-194