Data from DeGolyer, Volume 18, p. 7. (Many thanks to Norman Cos for a series of emails beginning on 12 February 2019 providing much of the information in this entry.) Works numbers were 12765-12766 in June 1892.
Locobase regrets that he cannot determine either the firebox or the evaporative heating surface area from his sources. However, the 56 tubes in the boiler offered 110 sq ft (10.22 sq m), which with the small wood-burning firebox fitted to this tiny locomotive, probably added up to about 135-140 sq ft (12.54-13 sq m) of EHS.
Norman Cos supplied the following history for La Paz (Gene Connelly's Baldwin roster says the history for Tipitapa, the other locomotive, was the same in most respects.): " To begin, this is the same company that has the survivor; No.5 HK Porter # 6595 build date 1920. The company is called; "Nicaragua Sugar Estates Ltd" also as known as "Ingenio San Antonio", it was founded in 1890, by five partners."
Describing a photograph he sent to steamlocomotive.com and Locobase, Cos added: "The name on the locomotive "Benard" was for a director who was president of the company during June 21, 1912 till 1935. Benard was made president after the original partner president "Alfredo Francisco Pellas Canessa" died. [NSEL]...still exist[s] today [2019], they make the rum "flor de ca ña".
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | La Paz |
| Locobase ID | 20530 |
| Railroad | Government of Nicaragua |
| Country | Nicaragua |
| Whyte | 2-4-0ST |
| Number in Class | 2 |
| Road Numbers | 12-13 |
| Gauge | 3'6" |
| Number Built | 2 |
| Builder | Burnham, Williams & Co |
| Year | 1892 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5 / 1.52 |
| Engine Wheelbase (ft / m) | 10.33 / 3.15 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.48 |
| Overall Wheelbase (engine & tender) (ft / m) | 10.33 / 3.15 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 17,000 / 7711 |
| Engine Weight (lbs / kg) | 22,000 / 9979 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 22,000 / 9979 |
| Tender Water Capacity (gals / ML) | 250 / 0.95 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 37 / 940 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 8" x 16" / 203x406 |
| Tractive Effort (lbs / kg) | 3764 / 1707.32 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.52 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 56 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 5 / 1.52 |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 5.67 / 0.53 |
| Evaporative Heating Surface (sq ft / m2) | |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | |
| Evaporative Heating Surface/Cylinder Volume | |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 907 |
| Same as above plus superheater percentage | 907 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |