Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 77, pp. 234+. Works number was 59887 in February 1927.
This Mogul's road number is apparently deceptive. After all, the SVRR ran from Suncook (just south of Concord, New Hampshire) northeast through Epsom to Pittsfield, opening that section in 1869 and thence to Center Barnstead. The latter segment of 4.5 miles (7.25 km) was completed only in 1889 as part of an extension to Alton Bay. The actual distance of the railroad measured from Hooksett a total of 24.2 miles (39 km) to Center Barnstead. Trains beginning at Hooksett climbed out of the Concord valley using a switchback to climb the escarpment.
It remained independent only until 1895, when it came under the Boston & Maine's control. Almost thirty years later, the B&M proposed abandoning the entire line, but local interests that prized the "Blueberry Route" (named for once-abundant blueberry bushes) found the money to buy the line from the receptive B&M. The final agreement came on 30 March 1925.
Needing a useful mixed-traffic locomotive, the SVRR bought this relatively common Baldwin type Its route ran on 60 lb/yard (30 kg/metre) on a gentle alignment of no more than 8 degree curves and 1.9% grades.
Once again independent, the SVRR struggled to make money over the next couple of decades, surviving primarily on its mail-contract revenue. The line was forced to end service between Pittsfield and Center Barnstead in 1947. The remainder of the road was abandoned in 1952.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 1 |
| Locobase ID | 15339 |
| Railroad | Suncook Valley |
| Country | USA |
| Whyte | 2-6-0 |
| Number in Class | 1 |
| Road Numbers | 1 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1927 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.50 / 3.51 |
| Engine Wheelbase (ft / m) | 19.33 / 5.89 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.59 |
| Overall Wheelbase (engine & tender) (ft / m) | 45.54 / 13.88 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 96,000 / 43,545 |
| Engine Weight (lbs / kg) | 112,000 / 50,802 |
| Tender Loaded Weight (lbs / kg) | 65,000 / 29,484 |
| Total Engine and Tender Weight (lbs / kg) | 177,000 / 80,286 |
| Tender Water Capacity (gals / ML) | 3000 / 11.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 53 / 26.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 52 / 1321 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 24" / 457x610 |
| Tractive Effort (lbs / kg) | 22,879 / 10377.75 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.20 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 219 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11 / 3.35 |
| Firebox Area (sq ft / m2) | 103 / 9.57 |
| Grate Area (sq ft / m2) | 21.30 / 1.98 |
| Evaporative Heating Surface (sq ft / m2) | 1355 / 125.88 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1355 / 125.88 |
| Evaporative Heating Surface/Cylinder Volume | 191.65 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3834 |
| Same as above plus superheater percentage | 3834 |
| Same as above but substitute firebox area for grate area | 18,540 |
| Power L1 | 4126 |
| Power MT | 284.26 |