[] (viewed 18 July 2003). A very early set of locomotives for Bulgaria, the 10 shipped soon became nine when 287 was scrapped for "technical defects", according to Simeon Trifonov. The Russe-Varna line was bought by the Bulgarian government in 1888 and these locomotives were renumbered 142-150. They were rated at 73 tons up 2.5% at 28 km/h (17.4 mph). The class was scrapped by 1914, although 148 was saved for museum service and film appearances.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 279 |
| Locobase ID | 5662 |
| Railroad | Russe-Varna |
| Country | Bulgaria |
| Whyte | 0-6-0 |
| Number in Class | 10 |
| Road Numbers | 279-288 |
| Gauge | Std |
| Number Built | 10 |
| Builder | Sharp, Stewart |
| Year | 1866 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14.75 / 4.50 |
| Engine Wheelbase (ft / m) | 14.75 / 4.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 34.78 / 10.60 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 67,351 / 30,550 |
| Engine Weight (lbs / kg) | 67,351 / 30,550 |
| Tender Loaded Weight (lbs / kg) | 58,863 / 26,700 |
| Total Engine and Tender Weight (lbs / kg) | 126,214 / 57,250 |
| Tender Water Capacity (gals / ML) | 2587 / 9.80 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6.50 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 37 / 18.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 54 / 1370 |
| Boiler Pressure (psi / kPa) | 116 / 800 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 |
| Tractive Effort (lbs / kg) | 12,665 / 5744.75 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.32 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 150 - 2" / |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 91.14 / 8.47 |
| Grate Area (sq ft / m2) | 14.42 / 1.34 |
| Evaporative Heating Surface (sq ft / m2) | 996 / 92.59 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 996 / 92.59 |
| Evaporative Heating Surface/Cylinder Volume | 157.97 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1673 |
| Same as above plus superheater percentage | 1673 |
| Same as above but substitute firebox area for grate area | 10,572 |
| Power L1 | 2404 |
| Power MT | 236.07 |