Saginaw Timber 2-6-6-2 "Mallet Mogul" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 4 (Locobase 4061)
Data from [
], supplemented by DeGolyer, Vol 80, pp. 254+. Works numbers were 58272 in March 1925 and 60602 in August 1928.
Principal Dimensions by Steve Llanso of Sweat House Media | |
|---|---|
| Class | 4 |
| Locobase ID | 4061 |
| Railroad | Saginaw Timber |
| Country | USA |
| Whyte | 2-6-6-2T |
| Number in Class | 2 |
| Road Numbers | 4-5 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1925 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 16 / 4.88 |
| Engine Wheelbase (ft / m) | 37.75 / 11.51 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.42 |
| Overall Wheelbase (engine & tender) (ft / m) | 37.75 / 11.51 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 182,000 / 82,554 |
| Engine Weight (lbs / kg) | 220,000 / 99,790 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 220,000 |
| Tender Water Capacity (gals / ML) | 2500 / 9.47 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1000 / 3785 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 51 / 25.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 200 / 13.80 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 26" x 24" / 660x610 |
| Tractive Effort (lbs / kg) | 37,545 / 17030.15 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.85 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 124 - 2" / 51 |
| Flues (number - dia) (in / mm) | 18 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 17 / 5.18 |
| Firebox Area (sq ft / m2) | 128 / 11.89 |
| Grate Area (sq ft / m2) | 26.20 / 2.43 |
| Evaporative Heating Surface (sq ft / m2) | 1654 / 153.72 |
| Superheating Surface (sq ft / m2) | 358 / 33.27 |
| Combined Heating Surface (sq ft / m2) | 2012 / 186.99 |
| Evaporative Heating Surface/Cylinder Volume | 262.46 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5240 |
| Same as above plus superheater percentage | 6183 |
| Same as above but substitute firebox area for grate area | 30,208 |
| Power L1 | 5486 |
| Power MT | 398.72 |