Data from DeGolyer, Volume 27, p.183 and Volume 28, p. 185 and Record of Recent Construction #54 (Baldwin Locomotive Works, 1905), p. 10-11. Works numbers were 24994-24996 in January 1905; 27049, 27056 in December.
This quintet was built for the same service as the North British engines shown in Locobase 3664. The Baldwins were slightly larger and had a little more heating surface, but they shared the same simple lines and Belpaire firebox. Baldwin's specification required the locomotive to haul 300 long tons (336 short tons) up a 1/1% ruling grade at 16 kph (10 mph). (Curve radii were never tighter than 1,000 meters)
Inside-admission, balanced piston valves measured 10" (254 mm) in diameter. Valve gear was controlled by a Belpaire lever and screw reverser.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 25/1451 |
| Locobase ID | 10980 |
| Railroad | FC Andino / Buenos Aires Pacific |
| Country | Argentina |
| Whyte | 4-6-0 |
| Number in Class | 5 |
| Road Numbers | 25-29/1451-1455 |
| Gauge | 5'6" |
| Number Built | 5 |
| Builder | Burnham, Williams & Co |
| Year | 1905 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.67 / 3.56 |
| Engine Wheelbase (ft / m) | 22.67 / 6.91 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.51 |
| Overall Wheelbase (engine & tender) (ft / m) | 48.62 / 14.82 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 103,750 / 47,060 |
| Engine Weight (lbs / kg) | 136,450 / 61,893 |
| Tender Loaded Weight (lbs / kg) | 77,550 / 35,176 |
| Total Engine and Tender Weight (lbs / kg) | 214,000 / 97,069 |
| Tender Water Capacity (gals / ML) | 3963 / 15.01 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6 / 5.50 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 58 / 29 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 68 / 1727 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 26" / 483x660 |
| Tractive Effort (lbs / kg) | 21,119 / 9579.43 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.91 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 272 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.42 / 4.09 |
| Firebox Area (sq ft / m2) | 151 / 14.03 |
| Grate Area (sq ft / m2) | 29.50 / 2.74 |
| Evaporative Heating Surface (sq ft / m2) | 2050 / 190.45 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 2050 / 190.45 |
| Evaporative Heating Surface/Cylinder Volume | 240.27 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5310 |
| Same as above plus superheater percentage | 5310 |
| Same as above but substitute firebox area for grate area | 27,180 |
| Power L1 | 6707 |
| Power MT | 427.56 |