Data from DeGolyer, Vol 80, pp. 419. Works number was 60834 in May 1929.
Founded in 1900 as the Hamilton Otto Coke Co in New Miami, Ohio, this iron and steel maker became one of the two suppliers of molten metal from open hearth furnaces to the Armco Steel Company. The 704 pulled a train of ladle or hot metal cars from the basic furnace to the steel-making furnace. This run usually began and ended in a single yard, but the B&O ran a hot metal train between Hamilton and Middletown, Ohio.
Just before this locomotive emerged from Eddystone, Armco bought the HC&IC. This Consolidation was basic transportation with few frills. Its cylinders used 8" (203 mm) piston valves. The line had only modest grades of 1 1/2% and 20 degree curves.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 704 |
| Locobase ID | 15490 |
| Railroad | Hamilton Coke & Iron Company |
| Country | USA |
| Whyte | 2-8-0 |
| Number in Class | 1 |
| Road Numbers | 704 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1929 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14.67 / 4.47 |
| Engine Wheelbase (ft / m) | 23.67 / 7.21 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.62 |
| Overall Wheelbase (engine & tender) (ft / m) | 58.04 / 17.69 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 169,000 / 76,657 |
| Engine Weight (lbs / kg) | 186,000 / 84,368 |
| Tender Loaded Weight (lbs / kg) | 125,000 / 56,699 |
| Total Engine and Tender Weight (lbs / kg) | 311,000 / 141,067 |
| Tender Water Capacity (gals / ML) | 6000 / 22.73 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 10 / 9 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 70 / 35 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 50 / 1270 |
| Boiler Pressure (psi / kPa) | 185 / 1280 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 22" x 28" / 559x711 |
| Tractive Effort (lbs / kg) | 42,621 / 19332.58 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.97 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 350 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.50 / 4.11 |
| Firebox Area (sq ft / m2) | 172 / 15.98 |
| Grate Area (sq ft / m2) | 46.70 / 4.34 |
| Evaporative Heating Surface (sq ft / m2) | 2650 / 246.19 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 2650 / 246.19 |
| Evaporative Heating Surface/Cylinder Volume | 215.10 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 8640 |
| Same as above plus superheater percentage | 8640 |
| Same as above but substitute firebox area for grate area | 31,820 |
| Power L1 | 4392 |
| Power MT | 229.18 |