Data from "Oil Burning Locomotives for Jamaica", Locomotive Magazine, Volume 32 (15 April 1926), pp. 105-106. Works numbers were 1859-1860 in May 1925.
This pair small but powerful Prairie engines were the only Barclay engines in the mid-1920s to include auxiliary trucks in their wheel arrangement and each had two, one ahead of the drivers, one under the firebox.
They used the Wallsend oil-firing system that relied on gravity feed to the firebox after being treated to an "ample pre-heating arrangement." All steam and oil pipes were made of steel. Even with 91% of the locomotives' weight placed on the drivers, the factor of adhesion seems a bit low at 3.83.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 2 |
| Locobase ID | 21188 |
| Railroad | Jamaica Sugar Estates |
| Country | Jamaica |
| Whyte | 2-6-2 |
| Number in Class | 2 |
| Road Numbers | 2-3 |
| Gauge | 2'6" |
| Number Built | 2 |
| Builder | Andrew Barclay |
| Year | 1926 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 6.50 / 1.98 |
| Engine Wheelbase (ft / m) | 12.25 / 3.73 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.53 |
| Overall Wheelbase (engine & tender) (ft / m) | 28.75 / 8.76 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 44,800 / 20,321 |
| Engine Weight (lbs / kg) | 49,280 / 22,353 |
| Tender Loaded Weight (lbs / kg) | 33,040 / 14,987 |
| Total Engine and Tender Weight (lbs / kg) | 82,320 / 37,340 |
| Tender Water Capacity (gals / ML) | 1440 / 5.45 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 600 / 2271 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 25 / 12.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 33 / 838 |
| Boiler Pressure (psi / kPa) | 175 / 1210 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 18" / 305x457 |
| Tractive Effort (lbs / kg) | 11,684 / 5299.78 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.83 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 43 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10 / 3.05 |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | |
| Evaporative Heating Surface (sq ft / m2) | 577 / 53.61 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 577 / 53.61 |
| Evaporative Heating Surface/Cylinder Volume | 244.89 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | |
| Same as above plus superheater percentage | |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |