Data from [], supplemented by DeGolyer, Vol 80, pp. 254+. Works numbers were 58272 in March 1925 and 60602 in August 1928.
Pair of Prairie Mallet full saddle tanks built by Baldwin for this logging road based in Brooklyn, Wash.. #4 with Saginaw until 1944, sold to White River (#7), later to Weyerhaeuser -- both in Enumclaw, Wash. #5 went from Saginaw to Bloedel, Stewart & Welch on Vancouver Island, BC. Both scrapped in the mid 1950s.
Principal Dimensions by Steve Llanso of Middle Run 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 / 1380 |
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 |