Data from MP SUBS 7 - 1935 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See Locobase 7819 for an outline history of the SAU&G line.
These Ten-wheelers were built a year after the SAU&G began service and were unusual in having been purchased new. The valve gear actuated 11" (279 mm) piston valves. Their driver diameter increased by an inch to 58" in 1931, after the Sausage Route was folded into the MP. The 298 was scrapped at Palestine in December 1934.
Principal Dimensions by Steve Llanso of Sweat House Media | |
|---|---|
| Class | 30/TN-63 - 25.7 |
| Locobase ID | 7757 |
| Railroad | San Antonio, Uvalde & Gulf (NOT & M/MP) |
| Country | USA |
| Whyte | 4-6-0 |
| Number in Class | 2 |
| Road Numbers | 30-31 / 298-299 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Alco-Schenectady |
| Year | 1913 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12 / 3.66 |
| Engine Wheelbase (ft / m) | 23.08 / 7.03 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.52 |
| Overall Wheelbase (engine & tender) (ft / m) | 56.08 / 17.09 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 113,500 / 51,483 |
| Engine Weight (lbs / kg) | 147,500 / 66,905 |
| Tender Loaded Weight (lbs / kg) | 123,000 / 55,792 |
| Total Engine and Tender Weight (lbs / kg) | 270,500 / 122,697 |
| 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) | 63 / 31.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 57 / 1448 |
| Boiler Pressure (psi / kPa) | 180 / 12.40 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 24" / 508x610 |
| Tractive Effort (lbs / kg) | 25,768 / 11688.18 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.40 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 145 - 2" / 51 |
| Flues (number - dia) (in / mm) | 21 - 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) | 1560 / 144.98 |
| Superheating Surface (sq ft / m2) | 310 / 28.81 |
| Combined Heating Surface (sq ft / m2) | 1870 / 173.79 |
| Evaporative Heating Surface/Cylinder Volume | 178.69 |
| 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 | 10,039 |
| Power MT | 584.99 |