Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 53, pp. 358+. See also the Mississippi-Illinois Railroad at [], quoting THE LEAD BELT NEWS, Flat River, St. Francois Co. MO, Fri. June 10, 1938. Works numbers were 44836-44837 in January 1917.
The Lead Belt in eastern Missouri inspired the development of the MR&BT as a narrow-gauge road built between Riverside, 25 miles (40.25 km) below St Louis, and Bonne Terre in 1890. The road was widened to the standard gauge in 1894, but grades never rose beyond 1.8% and the curves were a mild 8 degrees (radii of 717 feet/218.5 metres. The M-I site notes that the line was only 47 miles (75.7 km) long even when it was extended to Doe Run, "but it proved a great factor in the development of the Lead Belt and there was an enormous amount of traffic on the road."
Indeed, rail weights ranged between 75-90 lb/yard (37.5-45 kg/metre), which meant it was "constructed as substantially as most trunk lines." Even so, the order included the caution that: "Engine frames to be extra heavy throughout. Engine frames to be designed to withstand rough usage and considerable lateral thrust, which will be continually in evidence given that the road is all curves, there being only one tangent which is a mile long."
Ultimately, the road included branches dubbed Turpin, Hoffman, Gumbo, and Crawley.
The Missouri Pacific bought the MR&BT in 1929 and incorporated it into the Missouri-Illinois Railroad, which ran it as an independent subsidiary until 1945. The 6530 was scrapped in 1949, but 6531 was sold to Sparta, Illinois's Moffat Coal Company.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 30 / P-65 |
Locobase ID | 14344 |
Railroad | Mississippi River & Bonne Terre |
Country | USA |
Whyte | 4-6-2 |
Number in Class | 2 |
Road Numbers | 30-31 / 6530-6531 |
Gauge | Std |
Number Built | 2 |
Builder | Baldwin |
Year | 1917 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 12 / 3.66 |
Engine Wheelbase (ft / m) | 30.83 / 9.40 |
Ratio of driving wheelbase to overall engine wheelbase | 0.39 |
Overall Wheelbase (engine & tender) (ft / m) | 56.33 / 17.17 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 120,000 / 54,431 |
Engine Weight (lbs / kg) | 189,000 / 85,729 |
Tender Loaded Weight (lbs / kg) | 100,000 / 45,359 |
Total Engine and Tender Weight (lbs / kg) | 289,000 / 131,088 |
Tender Water Capacity (gals / ML) | 5000 / 18.94 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 10 / 9 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 67 / 33.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 64 / 1626 |
Boiler Pressure (psi / kPa) | 190 / 1310 |
High Pressure Cylinders (dia x stroke) (in / mm) | 21" x 26" / 533x660 |
Tractive Effort (lbs / kg) | 28,934 / 13124.26 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.15 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 164 - 2" / 51 |
Flues (number - dia) (in / mm) | 24 - 5.375" / 137 |
Flue/Tube length (ft / m) | 19 / 5.79 |
Firebox Area (sq ft / m2) | 154 / 14.31 |
Grate Area (sq ft / m2) | 44.30 / 4.12 |
Evaporative Heating Surface (sq ft / m2) | 2417 / 224.54 |
Superheating Surface (sq ft / m2) | 558 / 51.84 |
Combined Heating Surface (sq ft / m2) | 2975 / 276.38 |
Evaporative Heating Surface/Cylinder Volume | 231.96 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 8417 |
Same as above plus superheater percentage | 10,016 |
Same as above but substitute firebox area for grate area | 34,819 |
Power L1 | 15,966 |
Power MT | 879.97 |