Prussian P 4.1
The Prussian P 4.1 were passenger locomotives of the Prussian State Railways . There were two types of this.
P 4.1 Erfurt type
| P 4.1 Type Erfurt (Prussia) | |
|---|---|
| Numbering: | 36 001 |
| Number: | 57 |
| Manufacturer: | Henschel |
| Year of construction (s): | 1891-1893 |
| Axis formula : | 2 B |
| Length over buffers: | 15,615 mm |
| Service mass: | 49.1 t |
| Friction mass: | 28.2 t |
| Wheel set mass : | 14.1 t |
| Top speed: | 90 km / h |
| Driving wheel diameter: | 1,730 mm / 1,750 mm |
| Impeller diameter front: | 980 mm / 1,000 mm |
| Cylinder diameter: | 430 mm |
| Piston stroke: | 600 mm |
| Boiler overpressure: | 12 bar |
| Grate area: | 2.30 m² |
| Evaporation heating surface: | 125.00 m² |
| Tender: | pr 3 T 15 |
| Water supply: | 15.0 m³ |
The first two copies of the Prussian P 4.1 of the Erfurt design belonged to a test series of eight locomotives. Two locomotives with a drive wheel diameter of 1730 mm in twin and composite design ( Prussian P 4.2 ) and two locomotives each with a drive wheel diameter of 1600 mm in twin and composite design (later Prussian S 2 ) were put into service. The P 4 should be used in front of both passenger and express trains. After the two prototypes from 1891, Henschel built a total of 55 additional locomotives of this type. The vehicles had a running axle bogie that was prone to failure, which is why further construction was discontinued in favor of the P 4.1 of the Hanover type. From 1906 onwards, some of the locomotives were converted to the composite version.
The machines were a Tender equipped to type 3 T 15th
The Deutsche Reichsbahn took over four locomotives in their re-labeling plan for steam locomotives from 1923 as 36 7001 and 7002 as well as 36 001 and 002 (locomotives converted to composite design). In 1925 only the 36 001 was planned to be redrawn.
P 4.1 Hanover type
| P 4.1 (Prussia) DR class 36.70 |
|
|---|---|
 |
|
| Numbering: | DR 36 7001-7009 |
| Number: | 428 |
| Manufacturer: | Henschel et al. a. |
| Year of construction (s): | 1893-1902 |
| Retirement: | 1927 |
| Type : | 2'B n2 |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 16,411 mm |
| Service mass: | 47.6 t |
| Friction mass: | 29.6 t |
| Wheel set mass : | 15.0 t |
| Top speed: | 90 km / h |
| Driving wheel diameter: | 1,750 mm |
| Impeller diameter front: | 1,000 mm |
| Cylinder diameter: | 460 mm |
| Piston stroke: | 600 mm |
| Boiler overpressure: | 12 bar |
| Grate area: | 2.30 m² |
| Evaporation heating surface: | 117.9 m² |
The vehicles of the class P 4.1 (type Hanover) of the Prussian State Railways were a further development of the Erfurt P 4.1. They were first manufactured by Henschel between 1893 and 1902 , but then also by other locomotive factories. The total of 428 units, three of which were owned by the Royal Prussian Military Railway , had the improved Hanover-type running bogie, an external Heusinger control and larger cylinders. In the beginning they were also used in express train service, but later replaced in passenger train service. In the course of time, tests were carried out on some vehicles of this type. Some vehicles had flame tube superheaters or steam dryers of the Pielock design . Individual P 4.1s had been converted into compound machines of the P 4.2 .
In 1920, the Deutsche Reichsbahn transferred six locomotives to the Schwerin Directorate of the former Mecklenburg State Railroad in order to remedy the locomotive shortage that prevailed there. The delivered locomotives (Cassel 1827, 1831, 1832, 1835, 1830; Elberfeld 1822) were given the Mecklenburg railway numbers 181 to 186. Another locomotive was sold to the Eutin-Lübeck Railway in 1922 and was used there as number 17.
The Reich web had in their renumbering intended nor 157 locomotives than 36 7003-7100, 7104-7147, 7150-7162 and 7201, 7202 (Directorate Schwerin) for renumbering. In 1925, the remaining locomotives were given the numbers 36 7001–7009 . The last one was retired in 1927.
Other German railways also owned P 4.1:
- Royal Prussian Military Railway : Three locomotives, they were taken over by the Prussian State Railways in 1919/1920.
- Grand Ducal Oldenburg State Railways : 19 locomotives, smaller and weaker than the Prussian P 4.1 - see Oldenburg P 4.1 .
- Lübeck-Büchener Eisenbahn : Two locomotives with a shortened wheelbase.