South Florida 2-6-0 "Mogul" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class Herald (Locobase 16254)
Data from Baldwin Locomotive Works Specification for Engines, as digitized by the DeGolyer Library of Southern Methodist University, Volume 10, p. 125. For the South Florida, see also Donald R. Hensley, Jr., "The South Florida Railroad", TAP LINES website at [
], last accessed 26 January 2017. Works number was 5435 in January 1881.
This is one of the smallest Moguls in Locobase as of early 2017. Its tiny boiler, tiny firebox (see the explanation of the estimated area below), tiny grate served the SFRR for four years before it was sold to the Orange Belt Railroad in 1885 as their #1.
NB: The direct heating surface was calculated by assuming a cubic firebox and adding up the calculated square areas of the front tubesheet, the two sides, and the crown sheet. It is an estimate, but one that gains credibility with several other Baldwin designs with exactly the same firebox (e.g. Locobase 12024) for which the area is known.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Herald |
| Locobase ID | 16254 |
| Railroad | South Florida |
| Country | USA |
| Whyte | 2-6-0 |
| Number in Class | 1 |
| Road Numbers | 2 |
| Gauge | 3' |
| Number Built | 1 |
| Builder | Burnham, Parry, Williams & Co |
| Year | 1881 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8.50 / 2.59 |
| Engine Wheelbase (ft / m) | 13.58 / 4.14 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.63 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 18,000 / 8165 |
| Engine Weight (lbs / kg) | 23,000 / 10,433 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1000 / 3.79 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 10 / 5 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 35 / 889 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 9" x 16" / 229x406 |
| Tractive Effort (lbs / kg) | 4092 / 1856.10 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.40 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 68 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 6.20 / 1.89 |
| Firebox Area (sq ft / m2) | 20.70 / 1.92 |
| Grate Area (sq ft / m2) | 5.50 / 0.51 |
| Evaporative Heating Surface (sq ft / m2) | 187 / 17.37 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 187 / 17.37 |
| Evaporative Heating Surface/Cylinder Volume | 158.47 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 715 |
| Same as above plus superheater percentage | 715 |
| Same as above but substitute firebox area for grate area | 2691 |
| Power L1 | 1867 |
| Power MT | 686.00 |