Tennessee Central 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 504 (Locobase 7346)

Data from TC 1941ca Locomotive Diagrams and Miscellaneous Data supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Locobase knows that these Ten-wheelers were delivered as saturated-steam engines in 1903. At some later date they were superheated as shown here. A note in the diagram says that the superheater area includes the arch tube area, a calculation Locobase hasn't seen before.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID7346
RailroadTennessee Central
Number in Class3
Road Numbers504-506
Number Built3
BuilderAlco-Rhode Island
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.50 / 4.42
Engine Wheelbase (ft / m)25.67 / 7.82
Ratio of driving wheelbase to overall engine wheebase 0.56
Overall Wheelbase (engine & tender) (ft / m)58.02 / 17.68
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)126,500 / 57,380
Engine Weight (lbs / kg)172,500 / 78,245
Tender Loaded Weight (lbs / kg)107,200 / 48,625
Total Engine and Tender Weight (lbs / kg)279,700 / 126,870
Tender Water Capacity (gals / ML)7000 / 26.52
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)10 / 9.10
Minimum weight of rail (calculated) (lb/yd / kg/m)70 / 35
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 1600
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)20" x 26" / 508x660
Tractive Effort (lbs / kg)25,257 / 11456.40
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.01
Heating Ability
Firebox Area (sq ft / m2)157 / 14.59
Grate Area (sq ft / m2)32.15 / 2.99
Evaporative Heating Surface (sq ft / m2)2094 / 194.61
Superheating Surface (sq ft / m2)456 / 42.38
Combined Heating Surface (sq ft / m2)2550 / 236.99
Evaporative Heating Surface/Cylinder Volume221.50
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5787
Same as above plus superheater percentage6829
Same as above but substitute firebox area for grate area33,347
Power L113,960
Power MT729.88

  • TCRX 509 (Tennessee Central Depot, Cookeville, TN)
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