Saechsischen 4-6-2 Locomotives in Germany
Class Details by Steve Llanso of Sweat House Media
Class Group XVIII H/BR 18.0 (Locobase 4068)
Data from US Military Railway Service Equipment Data Book -- German Locomotives supplied from the extensive collection of Allen Stanley (March 2004); and "Baureihe 18.0" in Albert Gieseler's Dampfmaschinen und Lokomotiven at [
], last accessed 21 October 2022. See also [] (no longer available).
Extremely handsome Pacifics, this small group operated out of the Dresden shed for most of their locomotive lives. The Brimalm modelling website commented that these engines successfully blended South German and Prussian design practices.
This included absorption by the Reichsbahn in the early 1920s, survival (by 9 of the 10) of World War II, and premier express duties on the East German (Deutsches Reichsbahn) railway system until the early 1970s.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Group XVIII H/BR 18.0 |
| Locobase ID | 4068 |
| Railroad | Saechsischen (Saxon) Staats-Eisenbahnen |
| Country | Germany |
| Whyte | 4-6-2 |
| Number in Class | 10 |
| Road Numbers | 196-204/18.001-18.010 |
| Gauge | Std |
| Number Built | 10 |
| Builder | Hartmann |
| Year | 1917 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13.45 / 4.10 |
| Engine Wheelbase (ft / m) | 37.32 / 11.38 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.36 |
| Overall Wheelbase (engine & tender) (ft / m) | 60.78 / 18.52 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 37,258 / 16,900 |
| Weight on Drivers (lbs / kg) | 111,774 / 50,700 |
| Engine Weight (lbs / kg) | 206,132 / 93,500 |
| Tender Loaded Weight (lbs / kg) | 136,686 / 62,000 |
| Total Engine and Tender Weight (lbs / kg) | 342,818 / 155,500 |
| Tender Water Capacity (gals / ML) | 8184 / 31 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 7.70 / 7 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 62 / 31 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 75 / 1905 |
| Boiler Pressure (psi / kPa) | 203.10 / 1400 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19.69" x 24.8" / 500x630 (3) |
| Tractive Effort (lbs / kg) | 33,197 / 15057.92 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.37 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 156 - 2.244" / 57 |
| Flues (number - dia) (in / mm) | 28 - 5.236" / 133 |
| Flue/Tube length (ft / m) | 18.04 / 5.50 |
| Firebox Area (sq ft / m2) | 168.03 / 15.61 |
| Grate Area (sq ft / m2) | 48.65 / 4.52 |
| Evaporative Heating Surface (sq ft / m2) | 2328 / 216.25 |
| Superheating Surface (sq ft / m2) | 775 / 72 |
| Combined Heating Surface (sq ft / m2) | 3103 / 288.25 |
| Evaporative Heating Surface/Cylinder Volume | 177.57 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 9881 |
| Same as above plus superheater percentage | 12,351 |
| Same as above but substitute firebox area for grate area | 42,659 |
| Power L1 | 19,642 |
| Power MT | 1162.25 |