Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 17, p. 116. Works number was 12228 in September 1891.
Locobase suspects this purchase by Ciade Murrieta intended to compare the adhesion-leading layout with the more conventional Mogul shown in Locobase 11997 in similar roles. The "Blue Mountain" had identical power dimensions as well as sharing the firebox heating surface area and the number and diameter of tubes in the boiler. The difference was a 13% decrease in tube heating surface area due to the tubes' shorter length. Unusually for this wheel arrangement, this engine had a separate tender and no water tanks on the frame.
Locobase has no information if either variant was put into series production.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Serra Azul |
| Locobase ID | 11998 |
| Railroad | Cia de Murrieta |
| Country | Brazil |
| Whyte | 0-6-2 |
| Number in Class | 1 |
| Road Numbers | 2 |
| Gauge | 60 cm |
| Number Built | 1 |
| Builder | Burnham, Williams & Co |
| Year | 1891 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7 / 2.13 |
| Engine Wheelbase (ft / m) | 13.25 / 4.04 |
| 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) | 24,000 / 10,886 |
| Engine Weight (lbs / kg) | 29,000 / 13,154 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 900 / 3.41 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 13 / 6.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 33 / 838 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 10" x 16" / 254x406 |
| Tractive Effort (lbs / kg) | 5358 / 2430.35 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.48 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 59 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9.67 / 2.95 |
| Firebox Area (sq ft / m2) | 31 / 2.88 |
| Grate Area (sq ft / m2) | 7.20 / 0.67 |
| Evaporative Heating Surface (sq ft / m2) | 291 / 27.04 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 291 / 27.04 |
| Evaporative Heating Surface/Cylinder Volume | 200.08 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 936 |
| Same as above plus superheater percentage | 936 |
| Same as above but substitute firebox area for grate area | 4030 |
| Power L1 | 2193 |
| Power MT | 604.34 |