Data from "Locomotives", Type 81, Usines du Creusot-Schneider et Cie (Creusot: A Temporal, 1875), n.a. See also Metik Sergey's photo of the 1877 Orenburg railway station at [], last accessed 29 September 2024. Works numbers were 1781-1800 in 1875.
Orenburg was located on the Ural river in the southern Urals region about 1,500 km (930 miles) southeast of Moscow, which forms the boundary between Europe and Asia. Metik Sergey's caption underscores the border-city influences reflected in the Orenburg's station:
"The architecture of station comprises the European monumentalism and the Asian color as connects among themselves roads of the European and Asian direction. From the moment of construction the station building was repeatedly reconstructed, with increase in inhabitants and directions of movement of trains."
This batch of new locomotives presented the dimensions and sizes suitable for local passenger service. The large, urn-shaped stack suggests local wood or low-calorie coal as the primary fuel.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Type 81 |
| Locobase ID | 21212 |
| Railroad | Orenburg |
| Country | Russia |
| Whyte | 2-4-0 |
| Number in Class | 20 |
| Road Numbers | 206-225 |
| Gauge | 5' |
| Number Built | 20 |
| Builder | Schneider-Creusot |
| Year | 1875 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 10.99 / 3.35 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 5.91 / 1.80 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 68,343 / 31,000 |
| 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) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 61 / 1550 |
| Boiler Pressure (psi / kPa) | 126.20 / 870 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.93" x 24.02" / 430x610 |
| Tractive Effort (lbs / kg) | 12,107 / 5491.65 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 162 - 1.969" / 50 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.91 / 4.24 |
| Firebox Area (sq ft / m2) | 80.73 / 7.50 |
| Grate Area (sq ft / m2) | 14.21 / 1.32 |
| Evaporative Heating Surface (sq ft / m2) | 1243 / 115.50 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1243 / 115.50 |
| Evaporative Heating Surface/Cylinder Volume | 198.61 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1793 |
| Same as above plus superheater percentage | 1793 |
| Same as above but substitute firebox area for grate area | 10,188 |
| Power L1 | 3376 |
| Power MT | |