Tonopah & Tidewater 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 9 (Locobase 13232)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 31, p. 100. Works numbers were 32292-32293 in November 1907.

Locobase 8389 describes the 25-engine class delivered to the Atlanta, Birmingham & Atlantic beginning in 1904. The last delivery of this design came in August 1907. The similarity of the T&T's two Ten-wheelers shown in the current entry suggests that Baldwin reused the AB&A drawings for a very different setting.

Whatever their origins, the pair served the Nevada line until it closed in 1942. Morrison Knudson bought both locomotives and scrapped them.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID13,232
RailroadTonopah & Tidewater
Number in Class2
Road Numbers9-10
Number Built2
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.50 / 4.11
Engine Wheelbase (ft / m)24.33 / 7.42
Ratio of driving wheelbase to overall engine wheebase 0.55
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)111,700 / 50,666
Engine Weight (lbs / kg)146,500 / 66,451
Tender Loaded Weight (lbs / kg)88,000 / 39,916
Total Engine and Tender Weight (lbs / kg)234,500 / 106,367
Tender Water Capacity (gals / ML)4500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)2000 / 7.60
Minimum weight of rail (calculated) (lb/yd / kg/m)62 / 31
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 1600
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)19" x 26" / 483x660
Tractive Effort (lbs / kg)25,327 / 11488.15
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.41
Heating Ability
Firebox Area (sq ft / m2)166 / 15.42
Grate Area (sq ft / m2)28.20 / 2.62
Evaporative Heating Surface (sq ft / m2)2333 / 216.74
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2333 / 216.74
Evaporative Heating Surface/Cylinder Volume273.44
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5640
Same as above plus superheater percentage5640
Same as above but substitute firebox area for grate area33,200
Power L17785
Power MT460.96

All material Copyright ©
Wes Barris