Paris-Lyon / PLM 2-2-0 Locomotives in France
Class Details by Steve Llanso of Sweat House Media
Class 198 (Locobase 13359)
Data from the PLM Wiki vault crammed with data and plans at [
], last accessed 3 November 2011. The plan comes from the 1869 PLM plan book collected by Roland Sermet. See also Data from "'Crampton' Locomotives, Northern of France and PLM Rys", Locomotive Magazine, Volume XXVI [26] (15 November 1920), pp. 253-254.
These small lightweight locomotives had low, straight barrels, tall stacks, and short tanks on either side of the firebox. The design's running gear made it a baby Crampton, the big drivers on an axle under the footplate and a single carrying axle under the boiler course just behind the smokebox. Its outside cylinders were supplied through external pipes from the regulator on top of the boiler. A modified design of link motion (Williams-Howe aka Stephenson) was located outside of the wheels.
It served short, light passenger trains from 1856 to 1875, when it was retired.
NB: The boiler pressure setting is an estimate.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 198 |
| Locobase ID | 13359 |
| Railroad | Paris-Lyon / PLM |
| Country | France |
| Whyte | 2-2-0T |
| Number in Class | 3 |
| Road Numbers | 198-200 / 43-45 |
| Gauge | Std |
| Number Built | 3 |
| Builder | Cave |
| Year | 1856 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 10.83 / 3.30 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 10.83 / 3.30 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 25,574 / 11,600 |
| Weight on Drivers (lbs / kg) | 25,574 / 11,600 |
| Engine Weight (lbs / kg) | 48,722 / 22,100 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 43 / 21.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 65.70 / 1670 |
| Boiler Pressure (psi / kPa) | 107.30 / 740 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12.6" x 19.69" / 320x500 |
| Tractive Effort (lbs / kg) | 4340 / 1968.59 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.89 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 129 - 1.654" / 42 |
| Flues (number - dia) (in / mm) | - 5.039" / 128 |
| Flue/Tube length (ft / m) | 8.37 / 2.55 |
| Firebox Area (sq ft / m2) | 45.85 / 4.26 |
| Grate Area (sq ft / m2) | 9.90 / 0.92 |
| Evaporative Heating Surface (sq ft / m2) | 533 / 49.51 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 533 / 49.51 |
| Evaporative Heating Surface/Cylinder Volume | 187.57 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1062 |
| Same as above plus superheater percentage | 1062 |
| Same as above but substitute firebox area for grate area | 4920 |
| Power L1 | 3152 |
| Power MT | 271.72 |