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.
Data from US Military Railway System's Equipment Data Book supplied in March 2004 by Allen Stanley from his extensive Rail Data Exchange
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.
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.
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.
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 | |||||
---|---|---|---|---|---|
Class | 4-F | 4-H | 4C | 4C - 31 | 4C - 41 |
Locobase ID | 9997 | 9998 | 6171 | 9991 | 9992 |
Railroad | SNCF | SNCF | SNCF | SNCF | SNCF |
Country | France | France | France | France | France |
Whyte | 0-8-0 | 0-8-0 | 0-8-0 | 0-8-0 | 0-8-0 |
Number in Class | 25 | 1 | 10 | 12 | 90 |
Road Numbers | 1-10, 11-30 | 31-40, 131-132 | 41-70, 71-130 | ||
Gauge | Std | Std | Std | Std | Std |
Number Built | 12 | 90 | |||
Builder | several | ||||
Year | 1943 | ||||
Valve Gear | Walschaert | Walschaert | Walschaert | Walschaert | Walschaert |
Locomotive Length and Weight | |||||
Driver Wheelbase (ft / m) | 14.11 / 4.30 | 18.81 / 5.73 | 15.65 / 4.77 | 15.65 / 4.77 | 15.65 / 4.77 |
Engine Wheelbase (ft / m) | 14.11 / 4.30 | 18.81 / 5.73 | 15.65 / 4.77 | 15.65 / 4.77 | 15.65 / 4.77 |
Ratio of driving wheelbase to overall engine wheelbase | 1 | 1 | 1 | 1 | 1 |
Overall Wheelbase (engine & tender) (ft / m) | |||||
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |||||
Weight on Drivers (lbs / kg) | 129,755 / 58,856 | 127,280 / 57,733 | 115,676 / 52,470 | 117,880 / 53,470 | 120,164 / 54,506 |
Engine Weight (lbs / kg) | 129,755 / 58,856 | 127,280 / 57,733 | 115,676 / 52,470 | 117,880 / 53,470 | 120,164 / 54,506 |
Tender Loaded Weight (lbs / kg) | |||||
Total Engine and Tender Weight (lbs / kg) | |||||
Tender Water Capacity (gals / ML) | 4390 / 16.63 | 1849 / 7 | 1849 / 7 | 1849 / 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 / 27 | 53 / 26.50 | 48 / 24 | 49 / 24.50 | 50 / 25 |
Geometry Relating to Tractive Effort | |||||
Driver Diameter (in / mm) | 49.60 / 1260 | 49.60 / 1260 | 51.20 / 1300 | 51.20 / 1300 | 51.20 / 1300 |
Boiler Pressure (psi / kPa) | 198.70 / 1370 | 213 / 1470 | 217.60 / 1500 | 217.60 / 1500 | 217.60 / 1500 |
High Pressure Cylinders (dia x stroke) (in / mm) | 21.26" x 25.59" / 540x650 | 21.25" x 25.58" / 540x650 | 20.5" x 25.59" / 520x650 | 20.5" x 25.59" / 521x650 | 20.5" x 25.59" / 521x650 |
Tractive Effort (lbs / kg) | 39,385 / 17864.76 | 42,163 / 19124.84 | 38,850 / 17622.08 | 38,850 / 17622.08 | 38,850 / 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" / 70 | 121 - 2.75" / 70 | 184 - 2.563" / 65 | 184 - 2.563" / 65 | 184 - 2.563" / 65 |
Flues (number - dia) (in / mm) | |||||
Flue/Tube length (ft / m) | 13.62 / 4.15 | 14.36 / 4.38 | 9.82 / 2.99 | 9.95 / 3.03 | 11.25 / 3.43 |
Firebox Area (sq ft / m2) | 120.02 / 11.15 | 111 / 10.32 | 121 / 11.25 | 130 / 12.08 | 130 / 12.08 |
Grate Area (sq ft / m2) | 23.68 / 2.20 | 26.46 / 2.46 | 22.60 / 2.10 | 24.76 / 2.30 | 24.76 / 2.30 |
Evaporative Heating Surface (sq ft / m2) | 2647 / 245.90 | 2160 / 200.74 | 2188 / 203.35 | 2200 / 204.46 | 2478 / 230.30 |
Superheating Surface (sq ft / m2) | |||||
Combined Heating Surface (sq ft / m2) | 2647 / 245.90 | 2160 / 200.74 | 2188 / 203.35 | 2200 / 204.46 | 2478 / 230.30 |
Evaporative Heating Surface/Cylinder Volume | 251.76 | 205.71 | 223.82 | 225.04 | 253.48 |
Computations Relating to Power Output (More Information) | |||||
Robert LeMassena's Power Computation | 4705 | 5636 | 4918 | 5388 | 5388 |
Same as above plus superheater percentage | 4705 | 5636 | 4918 | 5388 | 5388 |
Same as above but substitute firebox area for grate area | 23,848 | 23,643 | 26,330 | 28,288 | 28,288 |
Power L1 | 5073 | 4553 | 5305 | 5413 | 5941 |
Power MT | 344.77 | 315.45 | 404.42 | 404.94 | 435.99 |
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 4D |
Locobase ID | 9995 |
Railroad | SNCF |
Country | France |
Whyte | 0-8-0 |
Number in Class | 10 |
Road Numbers | 1-10 |
Gauge | Std |
Number Built | 10 |
Builder | |
Year | |
Valve Gear | Walschaert |
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 wheelbase | 1 |
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 Volume | 198.61 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 2949 |
Same as above plus superheater percentage | 2949 |
Same as above but substitute firebox area for grate area | |
Power L1 | |
Power MT |