Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 27, p. 59. See also "Locomotive Boilers with Combustion Chambers", Engineering News, Volume LVI, No 21 (22 November 1906), pp. 531-534. Works number was 24356 in June 1904..
As big as the 1891 FC O de G Mogul may have been for the 3-foot gauge (Locobase 11992), this one was bigger. Indeed, it was the biggest Mogul on the skinny rail to that date. It had some interesting features that included a a wide firebox for the gauge and a combustion chamber that added 20 sq ft (1.86 sq m) to firebox heating surface area.
The Mulua was rated to haul 116 long tons up a 3 1/2% grade. The railway's ruling grade of 3.2% included 4 curves of 11 and 12 degrees. Its steepest straight grade sloped up at 3.7%.
Renumbered by the Guatamala Railway, the 91 had a relatively short career. It was retired by 1928.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 17, p. 87. Works number was 12146 in August 1891.
This was one of the largest Moguls produced for the 3-foot gauge.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | Mulua | San Felipe |
| Locobase ID | 13616 | 11992 |
| Railroad | Occidental de Guatemala | Occidental de Guatemala |
| Country | Guatemala | Guatemala |
| Whyte | 2-6-0 | 2-6-0 |
| Number in Class | 1 | 1 |
| Road Numbers | 6/91 | 4 / 54 / 68 / 87 |
| Gauge | 3' | 3' |
| Number Built | 1 | 1 |
| Builder | Burnham, Williams & Co | Burnham, Williams & Co |
| Year | 1904 | 1891 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 9.50 / 2.90 | 9.50 / 2.90 |
| Engine Wheelbase (ft / m) | 17.50 / 5.33 | 17.50 / 5.33 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.54 | 0.54 |
| Overall Wheelbase (engine & tender) (ft / m) | ||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 66,000 / 29,937 | 70,000 / 31,752 |
| Engine Weight (lbs / kg) | 74,000 / 33,566 | 78,000 / 35,380 |
| Tender Loaded Weight (lbs / kg) | 52,000 / 23,587 | |
| Total Engine and Tender Weight (lbs / kg) | 126,000 / 57,153 | |
| Tender Water Capacity (gals / ML) | 2500 / 9.47 | 1800 / 6.82 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 37 / 18.50 | 39 / 19.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 38 / 965 | 40 / 1016 |
| Boiler Pressure (psi / kPa) | 180 / 1240 | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 18" / 381x457 | 17" x 20" / 432x508 |
| Tractive Effort (lbs / kg) | 16,307 / 7396.74 | 15,967 / 7242.52 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.05 | 4.38 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 169 - 2" / 57 | 127 - 2.25" / 57 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 13.33 / 4.06 | 13.33 / 4.06 |
| Firebox Area (sq ft / m2) | 90.60 / 8.42 | 92.60 / 8.61 |
| Grate Area (sq ft / m2) | 15.40 / 1.43 | 15.40 / 1.43 |
| Evaporative Heating Surface (sq ft / m2) | 1263 / 117.34 | 1090 / 101.30 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 1263 / 117.34 | 1090 / 101.30 |
| Evaporative Heating Surface/Cylinder Volume | 343.06 | 207.45 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 2772 | 2002 |
| Same as above plus superheater percentage | 2772 | 2002 |
| Same as above but substitute firebox area for grate area | 16,308 | 12,038 |
| Power L1 | 5314 | 2562 |
| Power MT | 532.52 | 242.07 |