Christian Lindecke [] (visited 28 November 2003) for data. See also Reder (1974), pl 243.
See Locobase 635 for a full description of the Klose kinematic drive system. Applied successfully to an 0-6-0 design, its merits were if anything greater on the five-axle G class as Chief Locomotive designer Klose saw it. Note the three-cylinder compound arrangement -- the inside, high-pressure cylinder was fed by a Trick slide valve while the two outside, LP cylinders had inside valves driven by Heusinger gear. All three cylinders drove on the second axle. The class was fitted with a Belpaire firebox.
According to Lindecke, the design met expectations. Tonnage ratings included 680 tons up a 1% grade at 18 km/h (11 mph) and up the steeper (2.2%) Geilinger section with 300 tons at 13 km/h (8 mph). Appropriately for the service they entered, the engines were named after Alpine passes: ARLBERG, BRENNER, GOTTHARD, SEMMERING, SPLUGEN.
However, Reder commented that although "they ran smoothly ...the many components used in their construction turned out to be costly to maintain, so that there were only these five Class G engines, which were replaced from 1904 by the simpler Golsdorf type."
All five had been retired by 1921.
Christian Lindecke [] (visited 28 November 2003) for data, supplemented and amended by Albert Gieseler at [], last accessed 8 May 2011.
These heavy, 45-km/h (28 mph) machines put more power to the rails on the steep grades of the K.W.St.E, but they were delivered as saturated-steam engines. Driving on the 4th coupled axle meant positioning the crosshead in line with the second axle. The railway soon supplemented these 8 with 26 compound-working and superheated loks (Locobase 5828). When the DRG created class 57.3, they superheated the four survivors in 1925. Those are the locomotives -- 57 301-304 -- represented in the data. The last of these were retired in 1935.
Christian Lindecke [] (visited 28 November 2003) for data, supplemented and amended by data from Albert Gieseler, [], last accessed 8 May 2011.
When the H class (Locobase 5829) proved the answer to heavy trains on steep grades, the railway went further, superheating the basic design, installing cross-compound arrangement, and enlarging the firebox. Taking a common tradeoff, the new design reduced boiler pressure and heating surface size because of the relatively generous superheating surface. Twenty-six examples were delivered between 1908 and 1920. In 1923, the DRG classified 17 of the engines as BR 57 401-417
Data from
Christian Lindecke [] (visited 28 November 2003) and from US Military Railway Service Equipment Data Book -- German Locomotives supplied by Allen Stanley from his extensive Rail Data Exchange in March 2004. See also "Baureihe 94.1" on Dampfmaschinen und Lokomotiven at [], last accessed 21 April 2019. The tube/flue distribution is very unusual
Strictly intended for low-speed freight (50 km/h (27 mph) maximum), these engines were delivered over a two-period -- 16 in 1921, 14 in 1922.
When the DRG was formed in 1923, the class was redubbed BR 94.1. The last run for this class (94 113) came on 26 April 1961.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||||
|---|---|---|---|---|
| Class | G (Elefant) | H / BR 57.3 | Hh / BR 57.4 | Tn / BR 94.1 |
| Locobase ID | 5824 | 5829 | 5828 | 5759 |
| Railroad | Wurttembergische (Wurttemberg) Staatsbahn | Wurttembergische (Wurttemberg) Staatsbahn | Wurttembergische (Wurttemberg) Staatsbahn | Wurttembergische (Wurttemberg) Staatsbahn |
| Country | Germany | Germany | Germany | Germany |
| Whyte | 0-10-0 | 0-10-0 | 0-10-0 | 0-10-0T |
| Number in Class | 5 | 8 | 26 | 30 |
| Road Numbers | 801-805 | BR 57 301-304 | BR 57 401-417 | 94 1001 - 94 1030 |
| Gauge | Std | Std | Std | Std |
| Number Built | 5 | 8 | 26 | 30 |
| Builder | Esslingen | Esslingen | Esslingen | Esslingen |
| Year | 1892 | 1904 | 1905 | 1921 |
| Valve Gear | mixed | Heusinger | Walschaert | Walschaert |
| Locomotive Length and Weight | ||||
| Driver Wheelbase (ft / m) | 19.69 / 6 | 18.37 / 5.60 | 18.37 / 5.60 | |
| Engine Wheelbase (ft / m) | 19.69 / 6 | 18.37 / 5.60 | 18.37 / 5.60 | |
| Ratio of driving wheelbase to overall engine wheelbase | 1 | 1 | 1 | |
| Overall Wheelbase (engine & tender) (ft / m) | 40.81 / 12.44 | 40.81 / 12.44 | ||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 30,203 / 13,700 | 33,510 / 15,200 | 32,628 / 14,800 | 28,660 / 13,000 |
| Weight on Drivers (lbs / kg) | 153,001 / 69,400 | 167,992 / 76,200 | 162,701 / 73,800 | 142,198 / 64,500 |
| Engine Weight (lbs / kg) | 153,001 / 69,400 | 167,992 / 76,200 | 162,701 / 73,800 | 142,198 / 64,500 |
| Tender Loaded Weight (lbs / kg) | 61,729 / 28,000 | |||
| Total Engine and Tender Weight (lbs / kg) | 214,730 / 97,400 | |||
| Tender Water Capacity (gals / ML) | 2640 / 10 | 4092 / 15.50 | 4092 / 15.50 | 2112 / 8 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 | 6.60 / 6 | 6.60 / 6 | 3.30 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 51 / 25.50 | 56 / 28 | 54 / 27 | 47 / 23.50 |
| Geometry Relating to Tractive Effort | ||||
| Driver Diameter (in / mm) | 48.40 / 1230 | 49.20 / 1250 | 49.20 / 1250 | 45.30 / 1151 |
| Boiler Pressure (psi / kPa) | 174 / 1200 | 217.60 / 1500 | 188.50 / 1300 | 188.50 / 1300 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18.9" x 24.09" / 480x612 (1) | 24.41" x 24.09" / 620x612 | 24.41" x 24.09" / 620x612 (1) | 19.69" x 22.05" / 500x560 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 18.9" x 24.09" / 480x612 | 33.86" x 24.09" / 860x612 (1) | ||
| Tractive Effort (lbs / kg) | 19,722 / 8945.76 | 53,962 / 24476.78 | 30,759 / 13952.06 | 30,237 / 13715.29 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 7.76 | 3.11 | 5.29 | 4.70 |
| Heating Ability | ||||
| Tubes (number - dia) (in / mm) | 156 - 2.047" / 52 | 156 - 2.047" / 52 | 29 - 1.77" / 45 | |
| Flues (number - dia) (in / mm) | 25 - 5.236" / 133 | 25 - 5.236" / 133 | 118 - 2.75" / 70 | |
| Flue/Tube length (ft / m) | 15.42 / 4.70 | 14.44 / 4.40 | 11.48 / 3.50 | |
| Firebox Area (sq ft / m2) | 111.69 / 10.38 | 107.60 / 10 | 153.87 / 14.30 | 107 / 9.94 |
| Grate Area (sq ft / m2) | 23.46 / 2.18 | 30.13 / 2.80 | 27.98 / 2.60 | 21.74 / 2.02 |
| Evaporative Heating Surface (sq ft / m2) | 2126 / 197.60 | 1713 / 159.20 | 1713 / 159.20 | 1140 / 105.95 |
| Superheating Surface (sq ft / m2) | 500 / 46.50 | 500 / 46.50 | 613 / 56.97 | |
| Combined Heating Surface (sq ft / m2) | 2126 / 197.60 | 2213 / 205.70 | 2213 / 205.70 | 1753 / 162.92 |
| Evaporative Heating Surface/Cylinder Volume | 543.57 | 131.28 | 262.57 | 146.70 |
| Computations Relating to Power Output (More Information) | ||||
| Robert LeMassena's Power Computation | 4082 | 6556 | 5274 | 4098 |
| Same as above plus superheater percentage | 4082 | 8064 | 6487 | 5532 |
| Same as above but substitute firebox area for grate area | 19,434 | 28,799 | 35,676 | 27,229 |
| Power L1 | 4817 | 9232 | 8597 | 13,171 |
| Power MT | 347.05 | 605.77 | 582.45 | 1021.01 |