Data from "Class 042 T 72", Negative D-152, American Locomotive Company, supplied by Chris Hohl in his 1 February 2025 email.. See also Reclaiming Brewster's list of mining towns on the Florida Mining Town Website at [], last accessed 12 October 2025. Works numbers were 42779-42783 in October 1910.
Medulla, Florida's name did not connote a phosphate mining company's ownership when Lewis M Ballard opened a post office in the settlement. Its geographical location about 25 miles (40 km) east of Tampa placed it near several phosphate deposits and led to Alco's description of the little tank's owner. C G Meminger called the mine he began exploiting in 1907 Medulla Mine, but in the same year, established another town, naming it Cristina after his only child. Medulla Mine became Cristina Medulla Phosphate Company.
Stanford Phosphate Company acquired Meminger's companies and worked the mine until it closed in the early 1930s.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 10 |
| Locobase ID | 16680 |
| Railroad | Medulla Phosphate Mining Company |
| Country | USA |
| Whyte | 0-4-2ST |
| Number in Class | 5 |
| Road Numbers | 10-14 |
| Gauge | Std |
| Number Built | 5 |
| Builder | Alco-Dickson |
| Year | 1907 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7 / 2.13 |
| Engine Wheelbase (ft / m) | 14.25 / 4.34 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.49 |
| Overall Wheelbase (engine & tender) (ft / m) | 14.25 / 4.34 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 59,650 / 27,057 |
| Engine Weight (lbs / kg) | 71,800 / 32,568 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1075 / 4.07 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2 / 1.80 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 50 / 25 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 150 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 22" / 356x559 |
| Tractive Effort (lbs / kg) | 12,495 / 5667.64 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.77 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 92 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.50 / 3.20 |
| Firebox Area (sq ft / m2) | 53.80 / 5 |
| Grate Area (sq ft / m2) | 10.20 / 0.95 |
| Evaporative Heating Surface (sq ft / m2) | 556 / 51.65 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 556 / 51.65 |
| Evaporative Heating Surface/Cylinder Volume | 141.84 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1530 |
| Same as above plus superheater percentage | 1530 |
| Same as above but substitute firebox area for grate area | 8070 |
| Power L1 | 2315 |
| Power MT | 171.12 |