Bourbonnais / PLM 2-4-0 Locomotives in France
Class Details by Steve Llanso of Sweat House Media
Class 29 / 751 / 3 377 (Locobase 13427)
Data from the PLM Wiki vault crammed with data and plans at [
], last accessed 13 November 2011. The plan comes from the 1869 PLM plan book collected by Roland Sermet.
Another of the predecessor lines of the PLM (which secured a 99-year lease beginning on 1 January 1860), the Bourbonnais formed part of the main line from Paris to Lyon. Like most of the railways in the region at that time, the Bourbonnais procured a mixed-traffic six-wheeler locomotive. Its dimensions and areas were identical. Cail supplied the lowest-numbered 10 and Koechlin added the last 20 in the same year.
As part of the PLM motive-power roster after 1860, the 751s were updated with domed boilers in 1873. See Locobase 13420 for an example of an updated engine's resulting weights and areas.
and many increased boiler pressure first to 9 kg/sq cm (128 psi) in 1874 and 10 kg/sq cm (142 psi) in 1904. Most were retired in 1908-1918 with the balance going out of service in 1924-1928.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 29 / 751 / 3 377 |
| Locobase ID | 13427 |
| Railroad | Bourbonnais / PLM |
| Country | France |
| Whyte | 2-4-0 |
| Number in Class | 30 |
| Road Numbers | 29-60 / 751-780 / 3 377-3 383 |
| Gauge | Std |
| Number Built | 30 |
| Builder | several |
| Year | 1858 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.71 / 1.74 |
| Engine Wheelbase (ft / m) | 11.52 / 3.51 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.50 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 25,684 / 11,650 |
| Weight on Drivers (lbs / kg) | 51,368 / 23,300 |
| Engine Weight (lbs / kg) | 72,334 / 32,810 |
| 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) | 43 / 21.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 63 / 1600 |
| Boiler Pressure (psi / kPa) | 113.10 / 780 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17.72" x 23.62" / 450x600 |
| Tractive Effort (lbs / kg) | 11,317 / 5133.31 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.54 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 178 - 1.969" / 50 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.94 / 4.25 |
| Firebox Area (sq ft / m2) | 81.91 / 7.61 |
| Grate Area (sq ft / m2) | 13.46 / 1.25 |
| Evaporative Heating Surface (sq ft / m2) | 1259 / 116.94 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1259 / 116.94 |
| Evaporative Heating Surface/Cylinder Volume | 186.74 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1522 |
| Same as above plus superheater percentage | 1522 |
| Same as above but substitute firebox area for grate area | 9264 |
| Power L1 | 2939 |
| Power MT | 252.27 |