Mulhouse a Thann 2-4-0 Locomotives in France
Class Details by Steve Llanso of Sweat House Media
Class Ville de Thann (Locobase 11350)
Data from website celebrating these two pioneers in locomotive construction in Alsace - [
], last accessed 13 June 2010.
Built for the 20.3-km line, this engine was intended to scale the grade that ran 3.2 km between Cernay and Old Thann (Vieux Thann). Perhaps of greater interest at the time was its trip downgrade at up to 70 km/h (43 mph). Not bad for a low-drivered coupled engine in 1839.
Over the next several years, the Ville de Thann enjoyed a make over with new 380 x 520 mm cylinders, a boiler with 30 more sq metres of heating surface area, and ,ultimately, a rise in boiler pressure to 6 atmospheres. The pressure upgrade came in 1853, which was the same year that the Chemins de Fer de l'Est took over the Mulhouse and the Thann.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Ville de Thann |
| Locobase ID | 11350 |
| Railroad | Mulhouse a Thann |
| Country | France |
| Whyte | 2-4-0 |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 1 |
| Builder | Stehelin & Huber |
| Year | 1839 |
| Valve Gear | |
| 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) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 55,116 / 25,000 |
| 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) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 54 / 1372 |
| Boiler Pressure (psi / kPa) | 72.50 / 500 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12.99" x 18.11" / 330x460 |
| Tractive Effort (lbs / kg) | 3487 / 1581.68 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 50.79 / 4.72 |
| Grate Area (sq ft / m2) | |
| Evaporative Heating Surface (sq ft / m2) | 462 / 42.94 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 462 / 42.94 |
| Evaporative Heating Surface/Cylinder Volume | 166.31 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | |
| Same as above plus superheater percentage | |
| Same as above but substitute firebox area for grate area | 3682 |
| Power L1 | 1682 |
| Power MT | |