Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 49, p 111. Works numbers were 39902-39903 in May 1913.
J G White Engineering Corporation of #43 Exchange Place, New York City, ordered these oil-burning Consolidations for the Pacifico at the same time they bought the two Ten-wheelers shown in Locobase 14191. Like the smaller 4-6-0s, these engines operated on the 40 lb/yard (20 kg/metre) rail, up 3% grades, and around relatively gentle 10 degree curves.
A general note stipulates that "details where possible and suitable to interchangeable with [the Ten-wheelers]." As far as the main components went, however, everything in the 2-8-0s was bigger than its counterparts in the 4-6-0s. The firebox was lined with fire brick for oil burning and Baldwin's "standard oil burning arrangement" placed the burner in the front end of the firebox.
The specs also include a common post-delivery "Hereafter" note, in this instance dated 10 May 1915, that acknowledged the stresses encountered by these small engines operating in rough circumstances: "The equalizing beam links to be made stronger."
Data from "Class 280-95", Order S-1625, American Locomotive Company data card (August 1928); and Nicatren.com's at [], last accessed 20 August 2024. (Thanks to Teemu Koivumaki for his 18 August 2024 email supplying the data card for this class.) Works numbers were 67664-67665 in August 1928 and 68228-68229 in December 1929.
Road numbered immediately higher than the 1913 Baldwin pair (Locobase 14192)), these oil-burning Consolidations from Alco offered more cylinder volume that more than compensated for a lower boiler-pressure setting. The larger boiler held 50 more fire tubes.and the firebox area measured about 1/4 more than the earlier engines.
Two more joined the 27-28 under Schenectay order number S-1677.
Records show that all still operated on the Pacifico in March 1953 and a photo taken in 1964 showed the 28 in service.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | 25 | 27 |
| Locobase ID | 14192 | 21192 |
| Railroad | Pacifico de Nicaragua | Pacifico de Nicaragua |
| Country | Nicaragua | Nicaragua |
| Whyte | 2-8-0 | 2-8-0 |
| Number in Class | 2 | 4 |
| Road Numbers | 25-26 | 27-30 |
| Gauge | 3'6" | 3'6" |
| Number Built | 2 | 4 |
| Builder | Baldwin | Alco-Schenectady |
| Year | 1913 | 1928 |
| Valve Gear | Walschaert | Stephenson-Belpaire |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 12.25 / 3.73 | 12.67 / 3.86 |
| Engine Wheelbase (ft / m) | 18.92 / 5.77 | 19.67 / 6 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.65 | 0.64 |
| Overall Wheelbase (engine & tender) (ft / m) | 43.83 / 13.36 | 45.75 / 13.94 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 73,000 / 33,112 | 84,500 / 38,329 |
| Engine Weight (lbs / kg) | 82,000 / 37,195 | 95,000 / 43,091 |
| Tender Loaded Weight (lbs / kg) | 50,000 / 22,680 | 63,160 / 28,649 |
| Total Engine and Tender Weight (lbs / kg) | 132,000 / 59,875 | 158,160 / 71,740 |
| Tender Water Capacity (gals / ML) | 2500 / 9.47 | 2500 / 9.47 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1000 / 3785 | 1000 / 3785 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 30 / 15 | 35 / 17.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 43 / 1092 | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 180 / 1240 | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 | 17" x 22" / 432x559 |
| Tractive Effort (lbs / kg) | 18,218 / 8263.56 | 20,588 / 9338.57 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.01 | 4.10 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 154 - 2" / 51 | 203 - 2" / 51 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 11.58 / 3.53 | 11.58 / 3.53 |
| Firebox Area (sq ft / m2) | 85 / 7.90 | 104 / 9.66 |
| Grate Area (sq ft / m2) | 16.90 / 1.57 | 15.90 / 1.48 |
| Evaporative Heating Surface (sq ft / m2) | 1012 / 94.05 | 1318 / 122.45 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 1012 / 94.05 | 1318 / 122.45 |
| Evaporative Heating Surface/Cylinder Volume | 217.44 | 228.04 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 3042 | 2544 |
| Same as above plus superheater percentage | 3042 | 2544 |
| Same as above but substitute firebox area for grate area | 15,300 | 16,640 |
| Power L1 | 3983 | 3562 |
| Power MT | 481.15 | 371.73 |