Data from "Logging Locomotives", Record of Recent Construction #96 (Baldwin Locomotive Works, 1918), p. 22-23. See also DeGolyer, Volume 62, pp. 375. (Thanks to Chris Hohl for his 29 November 2015 email correcting the tender capacities and loaded weight.) Works number was 51771 in May 1919.
This logging Prairie used the same boiler and firebox as the Leesville, Slagle & Eastern locomotive shown in Locobase 11012. Increasing the driver diameter (presumably to allow it to operate as a mixed-traffic locomotive) required an increase in boiler pressure to maintain the same level of tractive effort. It had the big, spark-arresting stack used by many of the loggers, but unusually, steam was admitted to the cylinders through 9 1/2" (241 mm) piston valves. The tender's coal capacity was described in the Baldwin specs as "6 to 7 tons".
Since the Baldwin Record attributes the George Teat's ownership to the O-G RR from the start, Connelly's reference to the Caddo River Lumber #9 is a little confusing. In any case, the next change was the sale by the O-G in 1938 to the Prescott & Northwestern, who later sold it to Higgins Shipbuilding Company as their #7. Higgins sold #7 after the war to the Black Hill Central in South Dakota.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | George Teat |
| Locobase ID | 11013 |
| Railroad | Ozan-Graysonia Lumber Company |
| Country | USA |
| Whyte | 2-6-2 |
| Number in Class | 2 |
| Road Numbers | 2 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1919 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10.25 / 3.12 |
| Engine Wheelbase (ft / m) | 26.83 / 8.18 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.38 |
| Overall Wheelbase (engine & tender) (ft / m) | 50.69 / 15.45 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 96,000 / 43,545 |
| Engine Weight (lbs / kg) | 125,000 / 56,699 |
| Tender Loaded Weight (lbs / kg) | 80,000 / 36,287 |
| Total Engine and Tender Weight (lbs / kg) | 205,000 / 92,986 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 53 / 26.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 46 / 1168 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 |
| Tractive Effort (lbs / kg) | 23,070 / 10464.39 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.16 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 200 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 14.75 / 4.50 |
| Firebox Area (sq ft / m2) | 101 / 9.38 |
| Grate Area (sq ft / m2) | 18.70 / 1.74 |
| Evaporative Heating Surface (sq ft / m2) | 1637 / 152.08 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1637 / 152.08 |
| Evaporative Heating Surface/Cylinder Volume | 259.43 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3366 |
| Same as above plus superheater percentage | 3366 |
| Same as above but substitute firebox area for grate area | 18,180 |
| Power L1 | 4685 |
| Power MT | 322.77 |