Data from Martin Coombs, "Tipo SF", 3.1.7 El FC Iquique a Pintados in Chilean steam locomotive list Part 3 Metre gauge locomotives, (v 2.48, March 2022) p.74 at at
[], last accessed 24 January 2026. Works numbers were 9223-9229 in 1928.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | SF |
| Locobase ID | 21295 |
| Railroad | FC Iquique a Pintados |
| Country | Chile |
| Whyte | 2-10-2 |
| Number in Class | 12 |
| Road Numbers | 4-11 |
| Gauge | Metre |
| Number Built | 12 |
| Builder | Berliner Maschinenbau |
| Year | 1928 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 17.32 / 5.28 |
| Engine Wheelbase (ft / m) | 31.53 / 9.61 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.55 |
| Overall Wheelbase (engine & tender) (ft / m) | 60.43 / 18.42 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 132,079 / 59,910 |
| Engine Weight (lbs / kg) | 195,799 / 88,813 |
| Tender Loaded Weight (lbs / kg) | 94,501 / 42,865 |
| Total Engine and Tender Weight (lbs / kg) | 290,300 / 131,678 |
| Tender Water Capacity (gals / ML) | 5280 / 20 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 20 / 75.70 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 44 / 22 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 43.50 / 1105 |
| Boiler Pressure (psi / kPa) | 182.20 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17.72" x 22.05" / 450x560 (3) |
| Tractive Effort (lbs / kg) | 36,975 / 16771.60 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.57 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 18.54 / 5.65 |
| Firebox Area (sq ft / m2) | 161.03 / 14.96 |
| Grate Area (sq ft / m2) | 35.20 / 3.27 |
| Evaporative Heating Surface (sq ft / m2) | 1960 / 182.09 |
| Superheating Surface (sq ft / m2) | 611 / 56.76 |
| Combined Heating Surface (sq ft / m2) | 2571 / 238.85 |
| Evaporative Heating Surface/Cylinder Volume | 207.61 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 6413 |
| Same as above plus superheater percentage | 7953 |
| Same as above but substitute firebox area for grate area | 36,381 |
| Power L1 | 11,563 |
| Power MT | 965.03 |