Data from the SA&AP 6 - 1917 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. (See Locobase 7235 for a description of this SouthEast Texas railroad.) Works numbers were 2401-2405 in 1890 and 2607-2609 in 1891.
As Moguls went in those days, these were about average in power and near the top in size when they arrived on the CHV&T. When the Hocking Valley succeeded the CHV&T after a bankruptcy, it retained the class until 1899 and 1901. 90-91 were sold to the Ohio Central in 1899 as 110-111 and 92-98 followed in 1901, when they were renumbered 4-5, 7-9.
They constituted a relatively big class on the San Antonio &Aransas Pass, though, where six of them were numbered 150-155 in 1909 when the T&OC sold the sextet to the SA&AP. Three of these survived to be renumbered as Texas & New Orleans engines in the Southern Pacific systems.
The other two (HV 96-97) may have ended up on the South Dakota Central as their 11-12, but sources aren't certain. Gene Connelly's SDC roster shows the two, but with question marks. These doubts follow the two Moguls to the Watertown & Sioux Falls, to which they were sold in June 1916. See Locobase 7461-7462 for the two locomotives, which were rebuilt by Alco-Schenectady in 1902 and 1906.
NB: Locobase's calculation of the tube surface area falls short of the number given in the diagram by about the same amount as the firebox heating surface area given there as well. So he has adopted the calculated figure for the tubes and added the firebox heating surface given in the diagram.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 91 |
| Locobase ID | 7243 |
| Railroad | Columbus, Hocking Valley & Toledo (HV) |
| Country | USA |
| Whyte | 2-6-0 |
| Number in Class | 8 |
| Road Numbers | 91-98 |
| Gauge | Std |
| Number Built | 8 |
| Builder | Rhode Island |
| Year | 1890 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 16.27 / 4.96 |
| Engine Wheelbase (ft / m) | 23.70 / 7.22 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.69 |
| Overall Wheelbase (engine & tender) (ft / m) | 54.79 / 16.70 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 100,000 / 45,359 |
| Engine Weight (lbs / kg) | 117,720 / 53,397 |
| Tender Loaded Weight (lbs / kg) | 100,000 / 45,359 |
| Total Engine and Tender Weight (lbs / kg) | 217,720 / 98,756 |
| Tender Water Capacity (gals / ML) | 5000 / 18.94 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1480 / 5602 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 56 / 28 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 55 / 1397 |
| Boiler Pressure (psi / kPa) | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 24" / 483x610 |
| Tractive Effort (lbs / kg) | 20,085 / 9110.41 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.98 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 220 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11 / 3.35 |
| Firebox Area (sq ft / m2) | 134 / 12.45 |
| Grate Area (sq ft / m2) | 18 / 1.67 |
| Evaporative Heating Surface (sq ft / m2) | 1401 / 130.20 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1401 / 130.20 |
| Evaporative Heating Surface/Cylinder Volume | 177.79 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2700 |
| Same as above plus superheater percentage | 2700 |
| Same as above but substitute firebox area for grate area | 20,100 |
| Power L1 | 3614 |
| Power MT | 239.02 |