Data from [], the web site of the Spanish National Railway (link no longer active; see [], last accessed 26 December 2022. See also Justo Arenillas in "La material ingles en las pequenas companias", Lineas Del Tren (as reproduced on [], viewed 28 April 2003). Works numbers 1844-1853 in July 1886.
These ten six-couples were part of a three-design deal with Dubs & Co when the railway opened.
See Locobase 3335 for an account of the origins and rationale for the Zafra y Huelva.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 21/030-2251 |
| Locobase ID | 3432 |
| Railroad | Zafra a Huelva |
| Country | Spain |
| Whyte | 0-6-0 |
| Number in Class | 10 |
| Road Numbers | 21-30/030-2251-2260 |
| Gauge | 5'6" |
| Number Built | 10 |
| Builder | Dubs & Co |
| Year | 1886 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10.99 / 3.35 |
| Engine Wheelbase (ft / m) | 10.99 / 3.35 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 33.14 / 10.10 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 29,696 / 13,470 |
| Weight on Drivers (lbs / kg) | 89,067 / 40,400 |
| Engine Weight (lbs / kg) | 89,067 / 40,400 |
| Tender Loaded Weight (lbs / kg) | 46,958 / 21,300 |
| Total Engine and Tender Weight (lbs / kg) | 136,025 / 61,700 |
| Tender Water Capacity (gals / ML) | 1848 / 7 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 49 / 24.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 149.40 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17.99" x 24.02" / 457x610 |
| Tractive Effort (lbs / kg) | 20,567 / 9329.05 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.33 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 164 - 1.969" / 50 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.81 / 4.21 |
| Firebox Area (sq ft / m2) | 100.21 / 9.31 |
| Grate Area (sq ft / m2) | 16.36 / 1.52 |
| Evaporative Heating Surface (sq ft / m2) | 1297 / 120.46 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1297 / 120.46 |
| Evaporative Heating Surface/Cylinder Volume | 183.54 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2444 |
| Same as above plus superheater percentage | 2444 |
| Same as above but substitute firebox area for grate area | 14,971 |
| Power L1 | 3041 |
| Power MT | 225.82 |