Bulgarian State 2-6-2 Locomotives in Bulgaria
Class Details by Steve Llanso of Sweat House Media
Class 35 (Locobase 1597)
Data from [
] (viewed 18 July 2003). See also L Renewal, "The Railways of Bulgaria", Cassier's Engineering Monthly, Volume 52, No 1 (July 1917), pp. 13-24 , esp Table of Principal Dimensions, p. 15.
Tube diameters are inner dimensions.
These Prairie tanks served both as helper engines for passenger and freight work and as road engines on light passenger trains. Hanomag delivered the first 20 - ten in 1910, ten more six years later. Schwarzkopff produced 25 in 1921 -- these were heavier and had larger coal bunkers and water tanks. Many operated for over 50 years.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 35 |
| Locobase ID | 1597 |
| Railroad | Bulgarian State |
| Country | Bulgaria |
| Whyte | 2-6-2T |
| Number in Class | 20 |
| Road Numbers | 35.01-20 |
| Gauge | Std |
| Number Built | 20 |
| Builder | several |
| Year | 1910 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.15 / 3.40 |
| Engine Wheelbase (ft / m) | 27.56 / 8.40 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.40 |
| Overall Wheelbase (engine & tender) (ft / m) | 27.56 / 8.40 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 33,290 / 15,100 |
| Weight on Drivers (lbs / kg) | 99,693 / 45,220 |
| Engine Weight (lbs / kg) | 160,011 / 72,580 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 160,011 / 72,580 |
| Tender Water Capacity (gals / ML) | 2775 / 10.51 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4.40 / 4 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 55 / 27.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 52.80 / 1340 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18.11" x 23.62" / 460x600 |
| Tractive Effort (lbs / kg) | 21,700 / 9842.97 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.59 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 232 - 1.85" / 47 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.47 / 3.80 |
| Firebox Area (sq ft / m2) | 120.56 / 11.20 |
| Grate Area (sq ft / m2) | 30.14 / 2.80 |
| Evaporative Heating Surface (sq ft / m2) | 1522 / 141.36 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1522 / 141.36 |
| Evaporative Heating Surface/Cylinder Volume | 216.13 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5244 |
| Same as above plus superheater percentage | 5244 |
| Same as above but substitute firebox area for grate area | 20,977 |
| Power L1 | 4620 |
| Power MT | 306.50 |