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 Sweat House Media

Class35
Locobase ID1597
RailroadBulgarian State
CountryBulgaria
Whyte2-6-2T
Number in Class20
Road Numbers35.01-20
GaugeStd
Number Built20
Builderseveral
Year1910
Valve GearWalschaert
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 / 12
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 Volume216.13
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5244
Same as above plus superheater percentage5244
Same as above but substitute firebox area for grate area20,977
Power L14620
Power MT306.50

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