Data from Apercu des Chemins de Fer Russes Depuis l'Origine Jusqu'en 1892, Editor in Chief Andre de Gortschakov (Brussells: Paul Weissenbruch, 1897).
The authors say that this was a Mallet cross-compound. The two leading axles were balanced. The firebox had a semi-circular roof and was described as a Haswell-system layout. Both Nevsky and Briansk contributed locomotives of this design.
The class was rated at 15 versts/hour (10 mph) pulling a train of 45,000 poods (787 short tons or 703 long tons) up a 0.8% grade.
Data from M A Mallet, "Developpment de L'Application du System Compound", Memoirs ...Societe des Ingenieurs Civils, Annee [Juillet] 1890, Vol II (Paris: SIC, 1890). table pp. 42-43. ((Thanks to George Ferguson for his 12 July email correcting the railroad's ID.)
Mallet's own two-cylinder cross-compounding system.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | unknown | unknown |
| Locobase ID | 9120 | 12122 |
| Railroad | South Western | South Western |
| Country | Russia | Russia |
| Whyte | 0-8-0 | 0-8-0 |
| Number in Class | 9 | |
| Road Numbers | ||
| Gauge | 5' | 5' |
| Number Built | 9 | |
| Builder | several | SW |
| Year | 1891 | 1887 |
| Valve Gear | Stephenson | |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 13.58 / 4.14 | |
| Engine Wheelbase (ft / m) | 13.58 / 4.14 | |
| Ratio of driving wheelbase to overall engine wheelbase | 1 | |
| Overall Wheelbase (engine & tender) (ft / m) | ||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 112,436 / 51,000 | 103,617 / 47,000 |
| Engine Weight (lbs / kg) | 90,389 / 41,000 | 103,617 / 47,000 |
| Tender Loaded Weight (lbs / kg) | 79,366 / 36,000 | |
| Total Engine and Tender Weight (lbs / kg) | 169,755 / 77,000 | |
| Tender Water Capacity (gals / ML) | 3696 / 14 | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 47 / 23.50 | 43 / 21.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 51.20 / 1300 | 51.20 / 1300 |
| Boiler Pressure (psi / kPa) | 159.50 / 1100 | 130.50 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19.69" x 25.59" / 500x650 (1) | 19.69" x 25.59" / 500x650 (1) |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 27.95" x 25.59" / 710x650 (1) | 27.95" x 25.59" / 710x650 (1) |
| Tractive Effort (lbs / kg) | 17,557 / 7963.73 | 14,365 / 6515.86 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.40 | 7.21 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 198 - 1.969" / 50 | |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 16.73 / 5.10 | |
| Firebox Area (sq ft / m2) | 124.82 / 11.60 | |
| Grate Area (sq ft / m2) | 23.89 / 2.22 | 23.67 / 2.20 |
| Evaporative Heating Surface (sq ft / m2) | 1829 / 169.98 | 1345 / 125 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 1829 / 169.98 | 1345 / 125 |
| Evaporative Heating Surface/Cylinder Volume | 405.61 | 298.27 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 3810 | 3089 |
| Same as above plus superheater percentage | 3810 | 3089 |
| Same as above but substitute firebox area for grate area | 19,909 | |
| Power L1 | 3675 | |
| Power MT | 288.23 | |