Pacifics of modest dimensions purchased to pull the North Star Limited. Lyndon Groth (of the http://www.cashgroth.com/ -- Minneapolis & St. Louis/Iowa Central/Chicago & Northwestern Website -- accessed 2 January 2008) gives us some detail about one engine in particular:"The 502 was the pride of M&StL President Lucian Sprague would occasionally take the throttle. She participated in the pageant at the Chicago Railroad Fair in September 1949 and went from the fair to the scrapper. In Gene Green's book "Minneapolis & St. Louis In Color" it is noted that 502 had been on the ground many times and as a result the frame had been patched so many times she had truly reached the end of the line."
The M & St L went for gas-electric doodlebugs for their meager passenger service and these locomotives were gradually retired beginning in 1939. The last K1 went out of service a decade later in 1949.
| Specifications | |
|---|---|
| Class | K1-32 |
| Locobase ID | 6528 |
| Railroad | Minneapolis & St Louis (MSL) |
| Whyte | 4-6-2 |
| Road Numbers | 500-504 |
| Gauge | Std |
| Builder | Alco-Brooks |
| Year | 1920 |
| Valve Gear | Baker |
| Locomotive Length and Weight | |
| Driver Wheelbase | 12.50' |
| Engine Wheelbase | 32.92' |
| Ratio of driving wheelbase to overall engine wheebase | 0.38 |
| Overall Wheelbase (engine & tender) | 62.83' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 137000 lbs |
| Engine Weight | 225000 lbs |
| Tender Light Weight | 165500 lbs |
| Total Engine and Tender Weight | 390500 lbs |
| Tender Water Capacity | 8500 gals |
| Tender Fuel Capacity (oil/coal) | 11 tons |
| Minimum weight per yard of rail on which locomotive could run | 76.11 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 69" |
| Boiler Pressure | 190 psi |
| Cylinders (dia x stroke) | 22" x 28" |
| Tractive Effort | 31720 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.32 |
| Heating Ability | |
| Firebox Area | 190 sq. ft |
| Grate Area | 48.80 sq. ft |
| Evaporative Heating Surface | 2346 |
| Superheating Surface | 560 |
| Combined Heating Surface | 2906 |
| Evaporative Heating Surface/Cylinder Volume | 190.44 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 9272 |
| Same as above plus superheater percentage | 11058.76 |
| Same as above but substitute firebox area for grate area | 43056.64 |
| Power L1 | 14785.28 |
| Power MT | 713.78 |
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