Data from P C Dewhurst, "The Jamaica Government Railway and its Locomotives", Locomotive Magazine, Volume 25 (15 August 1919), p. 133. Works number was 2859 in 1893.
Dewhurst's commentary on Jamaican locomotives wonders about this purchase: "It was too light for useful work on the hill sections and as the level sections of the line were fully provided for by the English-built Nos 1-12, it is not easy to understand why the engine was obtained."
The engine was erected at Montego Bay, a rare departure from the usual Kingston-shed option at the opposite end of the island. It bore a resemblance to the Ocean State builder's various Forney urban passenger design.
After 20 years in service, the 18 was retired in September 1913.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 18 |
| Locobase ID | 20719 |
| Railroad | West India Improvement Company (JGR) |
| Country | Jamaica |
| Whyte | 2-4-4T |
| Number in Class | 1 |
| Road Numbers | 18 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Rhode Island |
| Year | 1893 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.92 / 3.63 |
| Engine Wheelbase (ft / m) | 22.33 / 6.81 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.53 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 44,900 / 20,366 |
| Engine Weight (lbs / kg) | 78,400 / 35,562 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1000 / 3.79 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.40 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 37 / 18.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 18" / 356x457 (1) |
| Tractive Effort (lbs / kg) | 5623 / 2550.55 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 7.99 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 98 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9.92 / 3.02 |
| Firebox Area (sq ft / m2) | 74.50 / 6.92 |
| Grate Area (sq ft / m2) | 12 / 1.11 |
| Evaporative Heating Surface (sq ft / m2) | 581 / 53.98 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 581 / 53.98 |
| Evaporative Heating Surface/Cylinder Volume | 362.33 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2160 |
| Same as above plus superheater percentage | 2160 |
| Same as above but substitute firebox area for grate area | 13,410 |
| Power L1 | 8563 |
| Power MT | 840.90 |