Data from Christian Lindecke's website [] (visited 2 Jan 2004) (translated by Google). Additional data from US Military Railway Service Equipment Data Book -- German Locomotives supplied by Allen Stanley from his extensive Rail Data Exchange in March 2004.
Built for "localbahn" service -- short-haul around the cities -- this class was based on the earlier and much more numerous D XI class. Like the D XI, these engines had Krauss-Helmholtz trucks.
They went into service with the LAG in 1900 as a trio. The other 5 were supplied to K.Bay.Sts.B in 1914, by which time the LAG engines had been incorporated into the larger railway as well. Built for "localbahn" service -- short-haul around the cities -- this class was based on the earlier and much more numerous D XI class. Like the D XI, these engines had Krauss-Helmholtz trucks.
When the DRG began numbering in 1923, all of the class was still in service. They ran for decades as 98 561-568 until retirement in 1951-1954.
The RMS databook shows 667 sq ft (ca. 62 sq m) plus 54 sq ft (5 sq m) of firebox heating surface. Lindecke shows the 62 sq m figure as the total EHS.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | PtL 3/4 / BR 98.561 |
| Locobase ID | 5811 |
| Railroad | Localbahn AG / K.Bay.Sts.B |
| Country | Germany |
| Whyte | 0-6-2T |
| Number in Class | 8 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 8 |
| Builder | Krauss Maffei |
| Year | 1900 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 24,030 / 10,900 |
| Weight on Drivers (lbs / kg) | 71,650 / 32,500 |
| Engine Weight (lbs / kg) | 90,610 / 41,100 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1135 / 4.30 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.70 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 40 / 20 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 39.60 / 1006 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14.76" x 20" / 375x508 |
| Tractive Effort (lbs / kg) | 16,273 / 7381.32 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.40 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 14.42 / 1.34 |
| Evaporative Heating Surface (sq ft / m2) | 672 / 62.43 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 672 / 62.43 |
| Evaporative Heating Surface/Cylinder Volume | 169.66 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2509 |
| Same as above plus superheater percentage | 2509 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |