Data from MP SUBS 7 - 1935 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers 53007 and 54381-54382 in 1913.
Locobase 7819 describes the orgins of this southern Texas railroad. The current entry shows a Consolidation of modest proportions and small drivers; few superheated 2-8-0s were as small.
The three engines were among the newest of the SAU&G's stud when it was taken over by the New Orleans, Texas & Mexico in the 1920s. 1003 and 1001 were scrapped at Palestine, Tex in May and September 1934, respectively.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 23/C-34 - 27.2 |
| Locobase ID | 7818 |
| Railroad | San Antonio, Uvalde & Gulf (NOT & M/MP) |
| Country | USA |
| Whyte | 2-8-0 |
| Number in Class | 3 |
| Road Numbers | 23-25/1001-1003 |
| Gauge | Std |
| Number Built | 3 |
| Builder | Alco-Pittsburgh |
| Year | 1913 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14 / 4.27 |
| Engine Wheelbase (ft / m) | 21.83 / 6.65 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.64 |
| Overall Wheelbase (engine & tender) (ft / m) | 56.33 / 17.17 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 128,270 / 58,182 |
| Engine Weight (lbs / kg) | 145,030 / 65,785 |
| Tender Loaded Weight (lbs / kg) | 129,300 / 58,650 |
| Total Engine and Tender Weight (lbs / kg) | 274,330 / 124,435 |
| Tender Water Capacity (gals / ML) | 6000 / 22.73 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2741 / 10,375 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 53 / 26.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 54 / 1372 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 24" / 508x610 |
| Tractive Effort (lbs / kg) | 27,200 / 12337.73 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.72 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 128 - 2" / 51 |
| Flues (number - dia) (in / mm) | 20 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 13.42 / 4.09 |
| Firebox Area (sq ft / m2) | 155 / 14.40 |
| Grate Area (sq ft / m2) | 31 / 2.88 |
| Evaporative Heating Surface (sq ft / m2) | 1438 / 133.64 |
| Superheating Surface (sq ft / m2) | 295 / 27.42 |
| Combined Heating Surface (sq ft / m2) | 1733 / 161.06 |
| Evaporative Heating Surface/Cylinder Volume | 164.72 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5580 |
| Same as above plus superheater percentage | 6529 |
| Same as above but substitute firebox area for grate area | 32,643 |
| Power L1 | 9033 |
| Power MT | 621.01 |