Proposed Biles-Coleman Lumber Co 2-6-6-2 "Mallet Mogul" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 8043 (Locobase 10694)
Data from [
], last accessed 26 July 2009. See also John E Lewis, Biles-Coleman Lumber Company's Reservation Narrow Gauge (Washington State: privately printed First Edition of 2,500 copies, 1980). (Many thanks to Ken Matzick for his 5 July 2015 email correcting the over-long stroke Locobase had originally entered.)
This locomotive was never actually built. B-C Lumber of Omak, Washington asked for a proposal from Baldwin and this is what the company submitted. It was based on the Ferrocarril do Sur #9 of 1921, described in Locobase 4762. Interestingly, this was not the heaviest 3-footer; several designs were built that were heavier.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 8043 |
| Locobase ID | 10694 |
| Railroad | Proposed Biles-Coleman Lumber Co |
| Country | USA |
| Whyte | 2-6-6-2T |
| Number in Class | |
| Road Numbers | |
| Gauge | 3' |
| Number Built | |
| Builder | Baldwin |
| Year | 1929 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14 / 4.27 |
| Engine Wheelbase (ft / m) | 20.75 / 6.32 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.67 |
| Overall Wheelbase (engine & tender) (ft / m) | 33.67 / 10.26 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 115,000 / 52,163 |
| Engine Weight (lbs / kg) | 180,000 / 81,647 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 180,000 |
| Tender Water Capacity (gals / ML) | 1500 / 5.68 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 700 / 2650 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 32 / 16 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 38 / 965 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13.5" x 20" / 343x508 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 21" x 20" / 533x508 |
| Tractive Effort (lbs / kg) | 23,076 / 10467.11 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.98 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 68 - 2" / 51 |
| Flues (number - dia) (in / mm) | 10 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 13 / 3.96 |
| Firebox Area (sq ft / m2) | 70 / 6.50 |
| Grate Area (sq ft / m2) | 11.70 / 1.09 |
| Evaporative Heating Surface (sq ft / m2) | 712 / 66.17 |
| Superheating Surface (sq ft / m2) | 143 / 13.29 |
| Combined Heating Surface (sq ft / m2) | 855 / 79.46 |
| Evaporative Heating Surface/Cylinder Volume | 214.95 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2340 |
| Same as above plus superheater percentage | 2738 |
| Same as above but substitute firebox area for grate area | 16,380 |
| Power L1 | 3711 |
| Power MT | 426.85 |