Data from Baldwin Locomotive Works Specification for Engines, 1903, as digitized by the DeGolyer Library of Southern Methodist University, Volume 31, p 7 and Volume 41, p. 108. Works numbers were 32219 in November 1907 and 38053 in July 1912.
Possibly because the 1907 Panic hit revenues, the last of an order of freight Ten-wheelers for the Midland Valley (Locobase 12859) was sold to the CVRR as their #7. The CVR served several cotton mills along the west bank of the river from West Point, Ga due south ultimately to Bleeker (27 miles) and north to Standing Rock, Ala. It opened in 1897.
The CVRR went back to Baldwin 5 years later to buy a sister to the 7. The 9's specs stated that the "wearing parts" were to be interchangeable with the 7, a requirement that simplified maintenance on a small road.
The 7 did wind up on the Midland, but the 9 found a new home at the Tennessee & North Carolina.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 7 |
| Locobase ID | 13174 |
| Railroad | Chattahoochee Valley |
| Country | USA |
| Whyte | 4-6-0 |
| Number in Class | 2 |
| Road Numbers | 7, 9 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Burnham, Williams & Co |
| Year | 1907 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.33 / 3.45 |
| Engine Wheelbase (ft / m) | 21.58 / 6.58 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.53 |
| Overall Wheelbase (engine & tender) (ft / m) | 51.96 / 15.84 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 97,000 / 43,999 |
| Engine Weight (lbs / kg) | 122,000 / 55,338 |
| Tender Loaded Weight (lbs / kg) | 100,000 / 45,359 |
| Total Engine and Tender Weight (lbs / kg) | 222,000 / 100,697 |
| Tender Water Capacity (gals / ML) | 5000 / 18.94 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 10.80 / 10 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 54 / 27 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 58 / 1473 |
| Boiler Pressure (psi / kPa) | 190 / 1310 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 24" / 457x610 |
| Tractive Effort (lbs / kg) | 21,652 / 9821.19 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.48 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 254 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.50 / 3.81 |
| Firebox Area (sq ft / m2) | 145 / 13.47 |
| Grate Area (sq ft / m2) | 22.20 / 2.06 |
| Evaporative Heating Surface (sq ft / m2) | 1796 / 166.85 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1796 / 166.85 |
| Evaporative Heating Surface/Cylinder Volume | 254.03 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4218 |
| Same as above plus superheater percentage | 4218 |
| Same as above but substitute firebox area for grate area | 27,550 |
| Power L1 | 6549 |
| Power MT | 446.54 |