RL / PLM 2-4-0 Locomotives in France


Class Details by Steve Llanso of Sweat House Media

Class 19 / 727 / 852 (Locobase 13419)

Data from the PLM Wiki vault crammed with data and plans at [link], last accessed 12 November 2011. The plan comes from the 1869 PLM plan book collected by Roland Sermet.

These were repeats of the P & S 2-4-0s of 1855 shown in Locobase 13418. They had 4 more tubes that were a little more than 5" longer. The 1860 batch built by successor Cail were a little lighter, but otherwise identical.

An 1873 modification resulted in a domed boiler. See Locobase 13420 for an example of an updated engine's resulting weights and areas.

Renumberings came in 1880 (824-833, 892-905) with a couple being renumbered 3 366-3 376, -3 390 in 1921.

Like the 824s, this class operated mixed-traffic service for over 50 years. Retirements occurred over the 1908-1924 period.


Class 781 / 892 / 3 388 (Locobase 13422)

Data from the PLM Wiki vault crammed with data and plans at [link], last accessed 12 November 2011. The plan comes from the 1869 PLM plan book collected by Roland Sermet.

These were repeats of the P & S 2-4-0s shown in Locobase 13419, but were a little lighter, but otherwise identical.

An 1873 modification resulted in a domed boiler. See Locobase 13420 for an example of an updated engine's resulting weights and areas.

Like the 824s, this class operated mixed-traffic service for over 50 years. Retirements occurred over the 1908-1924 period.


Class 9 / 717 / 824 (Locobase 13418)

Data from the PLM Wiki vault crammed with data and plans at [link], last accessed 12 November 2011. The plan comes from the 1869 PLM plan book collected by Roland Sermet.

The builder would be reorganized as Fives-Lille in 1861 and continue building locomotives until the end of steam. This set followed a set of single-drivered locomotives described in Locobase 13362.

The locomotives were updated several times chiefly to increase boiler pressure; the big alteration in 1873 resulted in a domed boiler.

Remarkably, all of the class remained in service for over 50 years. 828 was withdrawn first in 1909, 824-825 followed in 1910, 830 in 1911, 826, 829, and 833 in 1912. It wasn't until 1919-1922 that 827-828 and 831-832 were retired.

Principal Dimensions by Steve Llanso of Middle Run Media
Class19 / 727 / 852781 / 892 / 3 3889 / 717 / 824
Locobase ID13419 13422 13418
RailroadRL / PLMRL / PLMRL / PLM
CountryFranceFranceFrance
Whyte2-4-02-4-02-4-0
Number in Class101410
Road Numbers19-28 / 727-736 / 852-861781-794 / 892-905 / 3 3889-18 / 717-726 / 824-833
GaugeStdStdStd
Number Built101410
BuilderParent & SchakenCailParent & Schaken
Year185718601855
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 5.71 / 1.74 5.71 / 1.74 5.74 / 1.75
Engine Wheelbase (ft / m)11.52 / 3.5111.52 / 3.5110.99 / 3.35
Ratio of driving wheelbase to overall engine wheelbase 0.50 0.50 0.52
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)25,684 / 11,65024,295 / 11,02025,684 / 11,650
Weight on Drivers (lbs / kg)51,368 / 23,30048,546 / 22,02051,368 / 23,300
Engine Weight (lbs / kg)72,334 / 32,81065,147 / 29,55070,658 / 32,050
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 / 21.5040 / 2043 / 21.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 160063 / 160063 / 1600
Boiler Pressure (psi / kPa)113.10 / 780113.10 / 780113.10 / 780
High Pressure Cylinders (dia x stroke) (in / mm)17.72" x 23.62" / 450x60017.72" x 23.62" / 450x60017.72" x 23.62" / 450x600
Tractive Effort (lbs / kg)11,317 / 5133.3111,317 / 5133.3111,317 / 5133.31
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.54 4.29 4.54
Heating Ability
Tubes (number - dia) (in / mm)178 - 1.969" / 50178 - 1.969" / 50174 - 1.969" / 50
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.94 / 4.2513.94 / 4.2513.78 / 4.20
Firebox Area (sq ft / m2)81.91 / 7.6181.91 / 7.6181.81 / 7.60
Grate Area (sq ft / m2)13.46 / 1.2513.46 / 1.2513.56 / 1.26
Evaporative Heating Surface (sq ft / m2)1259 / 116.941259 / 116.941219 / 113.21
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1259 / 116.941259 / 116.941219 / 113.21
Evaporative Heating Surface/Cylinder Volume186.74186.74180.81
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation152215221534
Same as above plus superheater percentage152215221534
Same as above but substitute firebox area for grate area926492649253
Power L1293929392868
Power MT252.27266.94246.18

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