Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 66, p.230. Works numbers were 54882-54885 in June 1921.
Compared to several other Great Western classes, this quartet of oil-burning Ten-wheelers were pretty small. They did have superheaters, however, which reached the cylinders through 8" (203 mm) piston valves actuated by the outside constant-lead radial valve gear. The small boiler tubes were made of "Muntz Nicro Copper" as was the firebox; the flues were steel.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 220 |
| Locobase ID | 15111 |
| Railroad | Great Western |
| Country | Brazil |
| Whyte | 4-6-0 |
| Number in Class | 4 |
| Road Numbers | 220-223 / 305-308 |
| Gauge | Metre |
| Number Built | 4 |
| Builder | Baldwin |
| Year | 1921 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10 / 3.05 |
| Engine Wheelbase (ft / m) | 19.21 / 5.86 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.52 |
| Overall Wheelbase (engine & tender) (ft / m) | 44.17 / 13.46 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 63,000 / 28,576 |
| Engine Weight (lbs / kg) | 82,000 / 37,195 |
| Tender Loaded Weight (lbs / kg) | 57,700 / 26,172 |
| Total Engine and Tender Weight (lbs / kg) | 139,700 / 63,367 |
| Tender Water Capacity (gals / ML) | 2000 / 7.58 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 800 / 3028 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 35 / 17.50 |
| 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) | 16.5" x 20" / 419x508 |
| Tractive Effort (lbs / kg) | 17,631 / 7997.30 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.57 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 109 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | 12 - 5.25" / 133 |
| Flue/Tube length (ft / m) | 10.92 / 3.33 |
| Firebox Area (sq ft / m2) | 96 / 8.92 |
| Grate Area (sq ft / m2) | 15 / 1.39 |
| Evaporative Heating Surface (sq ft / m2) | 818 / 76.02 |
| Superheating Surface (sq ft / m2) | 151 / 14.03 |
| Combined Heating Surface (sq ft / m2) | 969 / 90.05 |
| Evaporative Heating Surface/Cylinder Volume | 165.26 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2400 |
| Same as above plus superheater percentage | 2784 |
| Same as above but substitute firebox area for grate area | 17,818 |
| Power L1 | 6012 |
| Power MT | 631.15 |