Data from "Fairlie's Engines for Sweden", Engineering, Volume 8 (24 December 1869), p 423. See also the George England, Robert Fairlie, and Hatcham Iron Works site at [], last accessed 9 August 2017. (Thanks to Alexander Blessing for his 24 December 2021 email correcting the Mountaineer's valve gear.)
A pair of the double Fairlie design, which had two boilers and engine bogies under a frame with two fireboxes back to back that fed both boilers, was originally intended to run on the Nassjo & Oscarshamm Railway in Sweden, but neither ever did.
This engine was instead sold to South Wales railway BP&GV.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Pioneer/Mountaineer |
| Locobase ID | 20247 |
| Railroad | Burry Port & Gwendraeth Valley |
| Country | Great Britain |
| Whyte | 0-4-4-0T |
| Number in Class | 2 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 2 |
| Builder | Fairlie Engine & Steam Carriage Co |
| Year | 1869 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5 / 1.52 |
| Engine Wheelbase (ft / m) | 19.50 / 5.94 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.26 |
| Overall Wheelbase (engine & tender) (ft / m) | 19.50 / 5.94 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 56,000 / 25,401 |
| Engine Weight (lbs / kg) | 56,000 / 25,401 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 840 / 3.18 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 0.84 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 23 / 11.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 10" x 18" / 254x457 (4) |
| Tractive Effort (lbs / kg) | 11,657 / 5287.53 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.80 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 218 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 8.87 / 2.70 |
| Firebox Area (sq ft / m2) | 70 / 6.50 |
| Grate Area (sq ft / m2) | 11 / 1.02 |
| Evaporative Heating Surface (sq ft / m2) | 833 / 77.39 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 833 / 77.39 |
| Evaporative Heating Surface/Cylinder Volume | 254.55 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1760 |
| Same as above plus superheater percentage | 1760 |
| Same as above but substitute firebox area for grate area | 11,200 |
| Power L1 | 4049 |
| Power MT | 637.61 |