Chattahoochee Valley 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 7 (Locobase 13174)

Data from Baldwin Locomotive Works Specification for Engines, 1903, as digitized by the DeGolyer Library of Southern Methodist University, Volume 31, p. 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 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 Sweat House Media
Locobase ID13,174
RailroadChattahoochee Valley
Number in Class2
Road Numbers7, 9
Number Built2
BuilderBurnham, Williams & Co
Valve GearStephenson
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 wheebase 0.53
Overall Wheelbase (engine & tender) (ft / m)51.96
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)97,000
Engine Weight (lbs / kg)122,000
Tender Loaded Weight (lbs / kg)100,000 / 45,359
Total Engine and Tender Weight (lbs / kg)222,000
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)10.80
Minimum weight of rail (calculated) (lb/yd / kg/m)54 / 27
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)58 / 1448
Boiler Pressure (psi / kPa)190 / 13.10
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
Firebox Area (sq ft / m2)145 / 13.48
Grate Area (sq ft / m2)22.20 / 2.06
Evaporative Heating Surface (sq ft / m2)1796 / 166.91
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1796 / 166.91
Evaporative Heating Surface/Cylinder Volume254.08
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4218
Same as above plus superheater percentage4218
Same as above but substitute firebox area for grate area27,550
Power L16550
Power MT446.61

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