SNCF 0-8-0 Locomotives in France


Class Details by Steve Llanso of Sweat House Media

Class 4-F (Locobase 9997)

Data from US Military Railway System's Equipment Data Book supplied in March 2004 by Allen Stanley from his extensive Rail Data Exchange.

Locobase cannot identify this design beyond the data provided in the Equipment Data

Book. He does observe, however, that this was a large 8-coupled for French service. Further research suggests that the original engines were PLM series 4 eight-coupleds produced by SACM in 1883, but rebuilt during World War II.


Class 4-H (Locobase 9998)

Data from US Military Railway System's Equipment Data Book supplied in March 2004 by Allen Stanley from his extensive Rail Data Exchange


Class 4C (Locobase 6171)

Data from US Military Railway System's Equipment Data Book supplied in March 2004 by Allen Stanley from his extensive Rail Data Exchange.

The vast majority of Prussian G8 locomotives operated by French railways arrived as reparation for the heavy damage done to French railways during World War I. This small group remained where they had operated in Alsace Lorraine, which came back under French control following the 1918 Armistice. The MRS guide divided them into two groups as shown in the road numbers, but Locobase does not see any differences. Two later batches are shown in Locobases 9991-9992. 9991 shows the same tube length but a larger firebox and grate; 9992 refers to a still later, more numerous group that had the larger grate and longer Serve tubes.

The boiler on this engine is surprisingly short, but the tubes were 30% greater in diameter. Clearly a low-speed engine with the dome over the gap between the two middle driving axles, small sand dome, and evenly tapered stack. The relatively high boiler pressure as well as the relatively large boiler suggests a locomotive designed for long bouts of heavy hauling.


Class 4C - 31 (Locobase 9991)

Data from US Military Railway System's Equipment Data Book supplied in March 2004 by Allen Stanley from his extensive Rail Data Exchange.

A later batch of the design shown in Locobase 6171, this set of 12 engines had larger fireboxes with a commensurate increase in grate area of almost 10%. Otherwise, the two designs were essentially identical. Locobase 9992 shows the next and most numerous variant.

Locobase cannot identify the original owner of these locomotives. The MRS guide divided them into 2 groups as shown in the road numbers, but Locobase does not see any differences.


Class 4C - 41 (Locobase 9992)

Data from US Military Railway System's Equipment Data Book supplied in March 2004 by Allen Stanley from his extensive Rail Data Exchange.

A later batch of the design shown in Locobase 6171 and 9991, this set of 90 engines had boiler tubes measuring about 0.5 m longer than either of the earlier batches and the larger grate area of the intermediate variant. The additional tube length on the same frame required a shorter smokebox length. In profile, the chimney sat in the center of the front-to-back length rather than closer to the front..

Locobase cannot identify the original owner of these locomotives. The MRS guide divided them into two groups as shown in the road numbers, but Locobase does not see any differences.


Class 4D (Locobase 9995)

Data from US Military Railway System's Equipment Data Book supplied in March 2004 by Allen Stanley from his extensive Rail Data Exchange.

In addition to the tubes and flues shown, this class had 12 52-mm tubes.

Principal Dimensions by Steve Llanso of Middle Run Media
Class4-F4-H4C4C - 314C - 41
Locobase ID9997 9998 6171 9991 9992
RailroadSNCFSNCFSNCFSNCFSNCF
CountryFranceFranceFranceFranceFrance
Whyte0-8-00-8-00-8-00-8-00-8-0
Number in Class251101290
Road Numbers1-10, 11-3031-40, 131-13241-70, 71-130
GaugeStdStdStdStdStd
Number Built1290
Builderseveral
Year1943
Valve GearWalschaertWalschaertWalschaertWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.11 / 4.3018.81 / 5.7315.65 / 4.7715.65 / 4.7715.65 / 4.77
Engine Wheelbase (ft / m)14.11 / 4.3018.81 / 5.7315.65 / 4.7715.65 / 4.7715.65 / 4.77
Ratio of driving wheelbase to overall engine wheelbase11111
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)129,755 / 58,856127,280 / 57,733115,676 / 52,470117,880 / 53,470120,164 / 54,506
Engine Weight (lbs / kg)129,755 / 58,856127,280 / 57,733115,676 / 52,470117,880 / 53,470120,164 / 54,506
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)4390 / 16.631849 / 71849 / 71849 / 7
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 7.70 / 7 4.90 / 5 4.90 / 5 4.90 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)54 / 2753 / 26.5048 / 2449 / 24.5050 / 25
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)49.60 / 126049.60 / 126051.20 / 130051.20 / 130051.20 / 1300
Boiler Pressure (psi / kPa)198.70 / 1370213 / 1470217.60 / 1500217.60 / 1500217.60 / 1500
High Pressure Cylinders (dia x stroke) (in / mm)21.26" x 25.59" / 540x65021.25" x 25.58" / 540x65020.5" x 25.59" / 520x65020.5" x 25.59" / 521x65020.5" x 25.59" / 521x650
Tractive Effort (lbs / kg)39,385 / 17864.7642,163 / 19124.8438,850 / 17622.0838,850 / 17622.0838,850 / 17622.08
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.29 3.02 2.98 3.03 3.09
Heating Ability
Tubes (number - dia) (in / mm)143 - 2.756" / 70121 - 2.75" / 70184 - 2.563" / 65184 - 2.563" / 65184 - 2.563" / 65
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.62 / 4.1514.36 / 4.38 9.82 / 2.99 9.95 / 3.0311.25 / 3.43
Firebox Area (sq ft / m2)120.02 / 11.15111 / 10.32121 / 11.25130 / 12.08130 / 12.08
Grate Area (sq ft / m2)23.68 / 2.2026.46 / 2.4622.60 / 2.1024.76 / 2.3024.76 / 2.30
Evaporative Heating Surface (sq ft / m2)2647 / 245.902160 / 200.742188 / 203.352200 / 204.462478 / 230.30
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2647 / 245.902160 / 200.742188 / 203.352200 / 204.462478 / 230.30
Evaporative Heating Surface/Cylinder Volume251.76205.71223.82225.04253.48
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation47055636491853885388
Same as above plus superheater percentage47055636491853885388
Same as above but substitute firebox area for grate area23,84823,64326,33028,28828,288
Power L150734553530554135941
Power MT344.77315.45404.42404.94435.99

Principal Dimensions by Steve Llanso of Middle Run Media
Class4D
Locobase ID9995
RailroadSNCF
CountryFrance
Whyte0-8-0
Number in Class10
Road Numbers1-10
GaugeStd
Number Built10
Builder
Year
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.29 / 4.05
Engine Wheelbase (ft / m)13.29 / 4.05
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)13.29 / 4.05
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)116,845 / 53,000
Engine Weight (lbs / kg)116,845 / 53,000
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)49 / 24.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)50 / 1270
Boiler Pressure (psi / kPa)130.50 / 900
High Pressure Cylinders (dia x stroke) (in / mm)21.26" x 25.98" / 540x660
Tractive Effort (lbs / kg)26,051 / 11816.55
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.49
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)22.60 / 2.10
Evaporative Heating Surface (sq ft / m2)2120 / 197.05
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2120 / 197.05
Evaporative Heating Surface/Cylinder Volume198.61
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2949
Same as above plus superheater percentage2949
Same as above but substitute firebox area for grate area
Power L1
Power MT

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