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

Class29 / 751 / 3 377
Locobase ID13427
RailroadBourbonnais / PLM
CountryFrance
Whyte2-4-0
Number in Class30
Road Numbers29-60 / 751-780 / 3 377-3 383
GaugeStd
Number Built30
Builderseveral
Year1858
Valve GearStephenson
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 / 7.80
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 Volume186.74
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1522
Same as above plus superheater percentage1522
Same as above but substitute firebox area for grate area9264
Power L12939
Power MT252.27

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