|K&T 2-8-2 Roster|
|Road Numbers||Year Built||Builder|
Compared to Baldwin Mikado #7 of 1908 (Locobase 4201), this was a scaled-up, superheated upgrade that rolled on much taller drivers, had much greater cylinder volume fed by 12" (305 mm) diameter piston valves, and weighed commensurately more.
The 10 was sold in 1964 to the Tennessee Valley Railroad Museum.
RA points out that this Mikado was designed specifically for short runs with heavy trains over a line that had 4% grades and curves of up to 20 deg, uncompensated. Hence the six axles to spread the weight, small drivers to grind the most out of the adhesion, and the small rigid wheelbase. The leading truck was equalized with the first two driving axles while the latter two driving axles were equalized with the rear truck of Rushton design.
RAG also noted that this design used a large number of flexible staybolts between the outer and inner firebox sheets.
"The Route of the Painted Rocks" short line served several coal mines owned by the Stearns Coal and Lumber Company of Stearns, Ky (near the Kentucky-Tennessee line). The Big South Fork site notes that it was one of the few "natural resource" roads to haul empty cars down a considerable grade and loaded cars up.
Coghlan reports that the promise of coal revenue sparked the 1902 start of railroad construction. He writes vividly:
"The railroad was begun, pushed through hills, and smashed through rock. It became apparent that the time for thinking about lumber was past and that coal, lots of coal, must be dug to make the railroad pay. Its cost for the first 15 miles was $50,000 a mile. For the first four miles it dropped 500 feet. That meant heavy, expensive locomotives. So about ten years ago the company changed its policy, refinanced itself, and became the Stearns Coal and Lumber Company; object, divorce from wood and matrimony with coal."
Observing that some would have considered the effort an example of throwing good money after bad, Coghlan says that the results spite the saying:
"From that time forward the penetration of Stearns into McCreary fastnesses has been progressive and fruitful. Today, the railroad, which was christened the Kentucky and Tennessee, reaches from Stearns to Exodus; a distance of 20 miles ... In the weight of its rails and the size of its equipment the K. and T. is a full-grown husky railroad, with three passenger trains each way daily and any amount of freight."
Predictions that it would eventually cover 50 miles failed to be borne out. The line eventually measured 21 miles and wound its way through Paunch Creek and up the South Fork of the Cumberland River. Some of its trains took miners back and forth on the 13 mile section between Stearns- where the K & T met the Southern Railway - and the mines at Cooperative. Coal and lumber trains went further down the line to Bell Farm.
The 7 was retired and scrapped after 40 years in 1951.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Kentucky & Tennessee||Kentucky & Tennessee|
|Number in Class||1||1|
|Builder||Baldwin||Burnham, Williams & Co|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||15.50 / 4.72||11.50 / 3.51|
|Engine Wheelbase (ft / m)||33.50 / 10.21||25.42 / 7.75|
|Ratio of driving wheelbase to overall engine wheebase||0.46||0.45|
|Overall Wheelbase (engine & tender) (ft / m)||63.98 / 19.50||51.83 / 15.80|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||204,000 / 92,533||140,050 / 63,526|
|Engine Weight (lbs / kg)||264,000 / 119,749||180,400 / 81,828|
|Tender Loaded Weight (lbs / kg)||124,000 / 56,246||100,000 / 45,359|
|Total Engine and Tender Weight (lbs / kg)||388,000 / 175,995||280,400 / 127,187|
|Tender Water Capacity (gals / ML)||6000 / 22.73||5000 / 18.94|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||10 / 9.10||6 / 5.50|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||85 / 42.50||58 / 29|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||55 / 1397||44 / 1118|
|Boiler Pressure (psi / kPa)||190 / 13.10||200 / 13.80|
|High Pressure Cylinders (dia x stroke) (in / mm)||24" x 30" / 610x762||21" x 24" / 533x610|
|Tractive Effort (lbs / kg)||50,740 / 23015.30||40,893 / 18548.77|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.02||3.42|
|Firebox Area (sq ft / m2)||204 / 18.95||148 / 13.75|
|Grate Area (sq ft / m2)||56.40 / 5.24||41.20 / 3.83|
|Evaporative Heating Surface (sq ft / m2)||3440 / 319.58||2677 / 248.79|
|Superheating Surface (sq ft / m2)||858 / 79.71|
|Combined Heating Surface (sq ft / m2)||4298 / 399.29||2677 / 248.79|
|Evaporative Heating Surface/Cylinder Volume||219.00||278.24|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||10,716||8240|
|Same as above plus superheater percentage||12,859||8240|
|Same as above but substitute firebox area for grate area||46,512||29,600|