Bulgarian State 0-6-0 Locomotives in Bulgaria


Class Details by Steve Llanso of Sweat House Media

Class 1002/47.01 (Locobase 5664)

[link] (viewed 18 July 2003) for data and information.

The first of the BDZ's 0-6-0T type, which were eventually grouped together as Class 47, this trio had somewhat larger boilers and fireboxes than later versions.


Class 1005/47.04 (Locobase 5665)

[link] (viewed 18 July 2003) for data and information. Firetube diameters are inner dimension - add 8-10% to find tube surface area as measured by Anglo-American standards.

Following up on the earlier 0-6-0Ts, this quintet tinkered with the grate and firebox areas and moved the steam dome forward to the first boiler course. The wheelbase also lengthened as the driver diameter decreased slightly.


Class 1010/47.09 (Locobase 5666)

[link] (viewed 18 July 2003) for data and information. 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. Firetube diameters are inner dimension - add 8-10% to find tube surface area as measured by Anglo-American standards.

Nine years after the Maffei engines appeared on the BDZ (Locobase 5665), the country ordered a new batch from a different builder. Using the same power dimensions, except for slightly smaller drivers, the new class had a smaller grate and somewhat smaller boiler. Externally, the principal differences were longer side tanks.


Class 1021/47.19 (Locobase 1600)

[link] (viewed 18 July 2003) for data and information. Firetube diameter is inner dimension.

Although grouped with other classes of 0-6-0Ts as Class 47 in the BDZ's 1936 renumbering, these were quite a bit newer and the only batch that came from Czechoslovakia. They were an amalgam of the earlier Maffei and Henschel designs.


Class River (Locobase 5663)

[link] (viewed 18 July 2003). There are two sub-classes to this small set of six-coupleds. The first five -- Iskar, Struma, Maritza, Yantra, and one unnamed -- had a single steam dome over the leading set of drivers. The last two had the double-dome arrangement with a dry pipe connecting the two. Otherwise, the designs were identical.

They were rated at 112 tons up 2.5% at 20 km/h (12.4 mph) and, with their relatively high drivers, used on passenger trains. All operated on the Tzaribrod-Sofia-Vakarel line; 156-157 later moved to the Yambol-Burgas route, an East-West alignment with one end on the Black Sea. All had been retired by 1921.

Principal Dimensions by Steve Llanso of Middle Run Media
Class1002/47.011005/47.041010/47.091021/47.19River
Locobase ID5664 5665 5666 1600 5663
RailroadBulgarian StateBulgarian StateBulgarian StateBulgarian StateBulgarian State
CountryBulgariaBulgariaBulgariaBulgariaBulgaria
Whyte0-6-0T0-6-0T0-6-0T0-6-0T0-6-0
Number in Class3511207
Road Numbers1002-1004/47.01-47.031005-1009/47.04-47.081010-10201021-1040/47.19-38151-157
GaugeStdStdStdStdStd
Number Built3511207
BuilderMaffeiMaffeiHenschel & SohnSkodaFloridsdorf
Year18971900190919251888
Valve GearWalschaertStephensonWalschaertWalschaertStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.40 / 3.4812.14 / 3.7012.14 / 3.7011.98 / 3.6511.22 / 3.42
Engine Wheelbase (ft / m)11.40 / 3.4812.14 / 3.7012.14 / 3.7011.98 / 3.6511.22 / 3.42
Ratio of driving wheelbase to overall engine wheelbase11111
Overall Wheelbase (engine & tender) (ft / m)12.1412.14 / 3.7035.20 / 10.73
Axle Loading (Maximum Weight per Axle) (lbs / kg)31,306 / 14,20032,915 / 14,93030,865 / 14,00031,967 / 14,500
Weight on Drivers (lbs / kg)93,917 / 42,60098,767 / 44,80092,594 / 42,00095,901 / 43,50085,716 / 38,880
Engine Weight (lbs / kg)93,917 / 42,60098,767 / 44,80092,594 / 42,00095,901 / 43,50085,716 / 38,880
Tender Loaded Weight (lbs / kg)58,863 / 26,700
Total Engine and Tender Weight (lbs / kg)144,579 / 65,580
Tender Water Capacity (gals / ML)1452 / 5.501320 / 51452 / 5.501452 / 5.502508 / 9.50
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.70 / 2 1.80 / 2 1.80 / 2 2.20 / 2 5.50 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)52 / 2655 / 27.5051 / 25.5053 / 26.5048 / 24
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48.60 / 123547.90 / 121647.50 / 120647.50 / 120657.30 / 1456
Boiler Pressure (psi / kPa)174 / 1200174 / 1200174 / 1200174 / 1200145 / 1000
High Pressure Cylinders (dia x stroke) (in / mm)16.54" x 24.02" / 420x61016.54" x 24.02" / 420x61016.54" x 24.02" / 420x61016.54" x 24.02" / 420x61017.72" x 25.59" / 450x650
Tractive Effort (lbs / kg)19,998 / 9070.9520,290 / 9203.4020,461 / 9280.9620,461 / 9280.9617,283 / 7839.45
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.70 4.87 4.53 4.69 4.96
Heating Ability
Tubes (number - dia) (in / mm)165 - 1.85" / 52187 - 1.57" / 45184 - 1.772" / 45187 - 1.57" / 45
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.81 / 3.60
Firebox Area (sq ft / m2)73.49 / 6.8368.97 / 6.4169 / 6.4168.97 / 6.41
Grate Area (sq ft / m2)21.30 / 1.9821.95 / 2.0417.33 / 1.6117.32 / 1.6117.11 / 1.59
Evaporative Heating Surface (sq ft / m2)1013 / 94.11981 / 91.21965 / 89.61981 / 91.211302 / 120.97
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1013 / 94.11981 / 91.21965 / 89.61981 / 91.211302 / 120.97
Evaporative Heating Surface/Cylinder Volume169.59164.23161.55164.23178.25
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation37063819301530142481
Same as above plus superheater percentage37063819301530142481
Same as above but substitute firebox area for grate area12,78712,00112,00612,001
Power L13257308330213057
Power MT229.37206.45215.79210.83

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