Zafra a Huelva 2-4-0 Locomotives in Spain


Class Details by Steve Llanso of Sweat House Media

Class 1/120-2091 (Locobase 3335)

Data from [link], the web site of the Spanish National Railway (link no longer active.). 1947 diagram book available online at [link], last accessed 26 December 2022. See also Justo Arenillas in "La material ingles en las pequenas companias", Lineas Del Tren (as reproduced on [link], viewed 28 April 2003); and http://[link] (17 May 2003), website of the Asociacion de Amigos del Ferrocarril Cuenc Mineral de Rio Tinto. Works numbers were 1854-1859 in 1887.

We're told that the railway was authorized in 1881 to provide a north-south public-use line that would serve many of the mines in Huelva province of Southwestern Spain. (Huelva is an Atlantic port located about 25 miles from the Portuguese border; Zafra is about 75 miles northeast of Huelva.) When the ZH opened, the railway contracted with Dubs to supply three batches of locomotives, each in a different arrangement. These 2-4-0s were the passenger engines.

Mines such as El Carpio, San Telmo, Lomero, Cueva de la Mora, La Joya, San Miguel had narrow-gauge lines that connected with the ZH at Valdelamusa or at the "whistle-stop (apeadero) of Tamujoso. Originally authorized in 1881, financing fell through. British interests came up with the necessary funds in 1884 and Valdelamusa-Huelva opened in 1886 with the Valdelamusa-Zafra section following in 1889.

Principal Dimensions by Steve Llanso of Middle Run Media
Class1/120-2091
Locobase ID3335
RailroadZafra a Huelva
CountrySpain
Whyte2-4-0
Number in Class6
Road Numbers1-6/120-2091-2096
Gauge5'6"
Number Built6
BuilderDubs & Co
Year1885
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.51 / 2.29
Engine Wheelbase (ft / m)13.52 / 4.12
Ratio of driving wheelbase to overall engine wheelbase 0.56
Overall Wheelbase (engine & tender) (ft / m)31.17 / 9.50
Axle Loading (Maximum Weight per Axle) (lbs / kg)25,728 / 11,670
Weight on Drivers (lbs / kg)51,456 / 23,340
Engine Weight (lbs / kg)76,081 / 34,510
Tender Loaded Weight (lbs / kg)46,958 / 21,300
Total Engine and Tender Weight (lbs / kg)123,039 / 55,810
Tender Water Capacity (gals / ML)1819 / 6.89
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 5.50 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)43 / 21.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)60 / 1524
Boiler Pressure (psi / kPa)149.40 / 1030
High Pressure Cylinders (dia x stroke) (in / mm)15.98" x 24.02" / 406x610
Tractive Effort (lbs / kg)12,982 / 5888.54
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.96
Heating Ability
Tubes (number - dia) (in / mm)157 - 1.969" / 50
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.79 / 3.29
Firebox Area (sq ft / m2)84.93 / 7.89
Grate Area (sq ft / m2)13.02 / 1.21
Evaporative Heating Surface (sq ft / m2)983 / 91.36
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)983 / 91.36
Evaporative Heating Surface/Cylinder Volume176.30
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1945
Same as above plus superheater percentage1945
Same as above but substitute firebox area for grate area12,689
Power L13772
Power MT323.22

All material Copyright © SteamLocomotive.com
Wes Barris