DRG Class 41
| DRB Class 41 | |
|---|---|
BR 41 360
|
|
| Number(s) | 41 001–366 |
| Quantity | 366 |
| Manufacturer | various |
| Year(s) of manufacture | 1937–1941 |
| Retired | 1986 |
| Wheel arrangement | 2-8-2 |
| Axle arrangement | 1'D1' h2 |
| Type | G 46.18/G 46.20 |
| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) |
| Length over buffers | 23,905 mm (78 ft 5 in) |
| Wheelbase incl. tender | 20,175 mm (66 ft 2 in) |
| Empty weight | 92.6 t (91.1 long tons; 102.1 short tons) |
| Service weight | 101.9 t (100.3 long tons; 112.3 short tons) |
| Adhesive weight | 70.0 t (68.9 long tons; 77.2 short tons) |
| Axle load | 19.7 t (19.4 long tons; 21.7 short tons) |
| Top speed | 90 km/h (56 mph) forward 50 km/h (31 mph) reverse |
| Indicated Power | 1,397 kW (1,873 hp) |
| Driving wheel diameter | 1,600 mm (62.99 in) |
| Leading wheel diameter | 1,000 mm (39.37 in) |
| Trailing wheel diameter | 1,250 mm (49.21 in) |
| No. of cylinders | 2 |
| Cylinder bore | 520 mm (20.47 in) |
| Piston stroke | 720 mm (28.35 in) |
| Boiler | Original, old-style, boiler |
| Boiler Overpressure | 20 bar (2,000 kPa; 290 psi) |
| No. of heating tubes | 85 |
| No. of smoke tubes | 20 |
| Heating tube length | 6,800 mm (22 ft 4 in) |
| Grate area | 3.89 m2 (41.9 sq ft) |
| Radiative heating area | 15.90 m2 (171.1 sq ft) |
| Tube heating area | 187.25 m2 (2,015.5 sq ft) |
| Superheater area | 72.22 m2 (777.4 sq ft) |
| Evaporative heating area | 203.65 m2 (2,192.1 sq ft) |
| Tender | 2'2' T 34 |
| Water capacity | 34.0 m3 (1,200 cu ft) |
| Fuel | 10.0 t (9.8 long tons; 11.0 short tons) coal |
| Brakes | Knorr |
| Auxiliary brake | yes |
| Train heating | Steam |
| Train control | Walschaerts (Heusinger) |
| Features | Axle load adjustable 18 t (18 long tons; 20 short tons)/20 t (20 long tons; 22 short tons) |
| DB Class 41 | |
|---|---|
41 241 in Essen Main station in the 1980s
|
|
| Quantity | 107 |
| Year(s) of manufacture | 1957–1961 (rebuilding) |
| Retired | 1975 |
| Service weight | 101.5 t (99.9 long tons; 111.9 short tons) |
| Service weight incl. tender | 175.7 t (172.9 long tons; 193.7 short tons) |
| Adhesive weight | 74.5 t (73.3 long tons; 82.1 short tons) |
| Axle load | 20.2 t (19.9 long tons; 22.3 short tons) |
| Indicated Power | 1,427 kW (1,914 hp) |
| Boiler | Rebuilt to coal-firing |
| Boiler Overpressure | 16 bar (1,600 kPa; 230 psi) |
| No. of heating tubes | 80 |
| No. of smoke tubes | 42 |
| Heating tube length | 5,200 mm (205 in) |
| Grate area | 3.87 m2 (41.7 sq ft) |
| Radiative heating area | 21.22 m2 (228.4 sq ft) |
| Tube heating area | 156.32 m2 (1,682.6 sq ft) |
| Superheater area | 95.77 m2 (1,030.9 sq ft) |
| Evaporative heating area | 177.54 m2 (1,911.0 sq ft) |
| data only shown where it differs from the Einheitslok | |
| DR Class 41 (Rekolok) | |
|---|---|
41 1144-9 of the IGE „Werrabahn Eisenach e. V.“
|
|
| Quantity | 80 |
| Manufacturer | RAW Zwickau RAW Karl-Marx-Stadt |
| Year(s) of manufacture | 1959–1960 (rebuilding) |
| Empty weight | 92.3 t (90.8 long tons; 101.7 short tons) |
| Service weight | 101.5 t (99.9 long tons; 111.9 short tons) |
| Service weight incl. tender | 178.7 t (175.9 long tons; 197.0 short tons) |
| Adhesive weight | 70.9 Mp |
| Axle load | 18.2 t (17.9 long tons; 20.1 short tons) |
| Indicated Power | 1,950 PS (1,430 kW; 1,920 hp) |
| Boiler | 39E |
| Boiler Overpressure | 16 bar (1,600 kPa; 230 psi) |
| No. of heating tubes | 112 |
| No. of smoke tubes | 36 |
| Heating tube length | 5,700 mm (18 ft 8 in) |
| Grate area | 4.23 m2 (45.5 sq ft) |
| Radiative heating area | 21.3 m2 (229 sq ft) |
| Tube heating area | 185.0 m2 (1,991 sq ft) |
| Superheater area | 83.80 m2 (902.0 sq ft) |
| Evaporative heating area | 206.30 m2 (2,220.6 sq ft) |
| Tender | 2'2'T34 or 2'2'T32 |
| data only shown where it differs from the Einheitslok | |
The German Class 41 steam locomotives were standard goods train engines (Einheitslokomotiven) operated by the Deutsche Reichsbahn (DRB) and built from 1937–1941.
In the search for a new, fast, goods train locomotive, the Deutsche Reichsbahn-Gesellschaft (DRG) in 1934 was attracted by the proposal from the Berliner Maschinenbau (BMAG, formerly Louis Schwartzkopff) for a 2-8-2 (1'D1'h2) engine. The design, produced by Friedrich Wilhelm Eckhardt (1892–1961), differed from the DRG's original requirement for a 2-8-0 (1'D) engine, because the required performance with an 18-ton axle load was easier to generate on a 2-8-2 engine rather than one with a 2-8-0 wheel configuration. Continued adherence to this instruction would in the end have given the new engine no significant advantage over the Prussian goods train locomotives which were to be withdrawn. The Reichsbahn Central Office Engineering Works (RZM) eventually agreed to this proposal; the BMAG was tasked to develop the proposed design and produce two prototypes.
In January 1937 the two prototype locomotives, 41 001 and 41 002, were delivered to the DRG, who subsequently tested them thoroughly and bought them. The prototypes soon proved themselves, with their power, performance and quiet riding qualities, as well as their exceptional acceleration.
In developing the Class 41, the principle of having standard locomotives (Einheitsloks) demonstrated the financial advantages of standardization. For example, the construction costs of the engine, through the use of components from the simultaneously developed Class 03, 06 and 45 engines, was under 10,000 Reichsmarks.
...
Wikipedia