Data from Wiener (1930); and from P C Dewhurst, "The Jamaica Government Railway and its Locomotives", Locomotive Magazine, Volume 25 (15 November 1919), p. 194-195.
Kitson-Meyer type with very long side tanks flanking a Belpaire firebox. Each truck was pivoted not in the center of the three-axle assembly but at a point 10" (254 mm) ahead of that center. Each truck was fully equalized.
Changing the path of exhaust from the rear engine set from going up its separate stack to coming forward to the smokebox caused trouble with "excessive draught throwing sparks". A diamond stack did not cure the problem. Another change lengthened the fuel and water bunker behind the cab to fill the frame.
In his 1919 report, Dewhurst wrote that the trio had "not proved very satisfactory, being heavy on coal and repairs compared with other engines doing the same work." As a result, even the character of the line "difficult as it is, hardly justif[ies] the use of a type so expensive in fuel and upkeep."
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 30 |
Locobase ID | 3624 |
Railroad | Jamaican Government |
Country | Jamaica |
Whyte | 0-6-0+0-6-0T |
Number in Class | 3 |
Road Numbers | 30-32 |
Gauge | Std |
Number Built | 3 |
Builder | Kitson & Co |
Year | 1904 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 15.50 / 2.59 |
Engine Wheelbase (ft / m) | 29.75 / 10.87 |
Ratio of driving wheelbase to overall engine wheelbase | 0.52 |
Overall Wheelbase (engine & tender) (ft / m) | 29.75 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 180,096 / 81,690 |
Engine Weight (lbs / kg) | 180,096 / 81,690 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | 180,096 / 81,690 |
Tender Water Capacity (gals / ML) | |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 50 / 25 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 42 / 1067 |
Boiler Pressure (psi / kPa) | 203 / 1400 |
High Pressure Cylinders (dia x stroke) (in / mm) | 13" x 22" / 330x559 (4) |
Tractive Effort (lbs / kg) | 30,550 / 13857.26 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.90 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 226 - 1.875" / 48 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 12 / 3.66 |
Firebox Area (sq ft / m2) | 130 / 12.17 |
Grate Area (sq ft / m2) | 26.10 / 2.43 |
Evaporative Heating Surface (sq ft / m2) | 1458 / 135.59 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1458 / 135.59 |
Evaporative Heating Surface/Cylinder Volume | 215.70 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 5298 |
Same as above plus superheater percentage | 5298 |
Same as above but substitute firebox area for grate area | 26,390 |
Power L1 | 4431 |
Power MT | 325.45 |