Data from OWRR&NCo 1 - 1930 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 17, p. 41. Works number was 11925 in May 1891. (9929 from April 1889 took road number 22 and may have been built to the same design, but Locobase cannot confirm.)
The 1891 specs reflect an earlier design from the later boiler shown in the specs. Pressure was set to a typical 130 psi (9 bar)--30 psi lower than the later figure--and 131 tubes occupied the boiler. On the other hand, the steel firebox's dimensions appear to have been unchanged. The operating environment included grades as steep as 126 ft/mile (2.35%) and curves as tight as 16 deg.
After serving on the SPC (NS) for 16 years, the 23 was sold in 1907 to the Ilwaco Railway & Navigation Company for $5,700. This narrow-gauge railway had a colorful and always tenuous existence that was mercifully terminated in 1910 when it was taken over by the Union Pacific's Oregon-Washington Railroad & Navigation Company. That railroad renumbered this engine as N (narrow gauge) 4 and operated it until 1931, when the line was closed.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 23/6/T-50 |
| Locobase ID | 7838 |
| Railroad | South Pacific Coast (North Shore) |
| Country | USA |
| Whyte | 4-6-0 |
| Number in Class | 1 |
| Road Numbers | 23/6/4 |
| Gauge | 3' |
| Number Built | 1 |
| Builder | Burnham, Parry, Williams & Co |
| Year | 1891 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12.50 / 3.81 |
| Engine Wheelbase (ft / m) | 21.67 / 6.61 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.58 |
| Overall Wheelbase (engine & tender) (ft / m) | 41.25 / 12.57 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 19,000 / 8618 |
| Weight on Drivers (lbs / kg) | 56,000 / 25,401 |
| Engine Weight (lbs / kg) | 74,000 / 33,566 |
| Tender Loaded Weight (lbs / kg) | 48,172 / 21,850 |
| Total Engine and Tender Weight (lbs / kg) | 122,172 / 55,416 |
| Tender Water Capacity (gals / ML) | 2000 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 31 / 15.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1448 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x610 |
| Tractive Effort (lbs / kg) | 14,507 / 6580.27 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.86 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 127 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.92 / 3.63 |
| Firebox Area (sq ft / m2) | 88.69 / 8.24 |
| Grate Area (sq ft / m2) | 13.70 / 1.27 |
| Evaporative Heating Surface (sq ft / m2) | 863 / 80.20 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 863 / 80.20 |
| Evaporative Heating Surface/Cylinder Volume | 185.59 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2192 |
| Same as above plus superheater percentage | 2192 |
| Same as above but substitute firebox area for grate area | 14,190 |
| Power L1 | 3596 |
| Power MT | 424.70 |