Tonopah & Tidewater 4-6-0 "Ten-wheeler" Locomotives of 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 identicality (?) 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.

Specifications 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)13.50
Engine Wheelbase (ft)24.33
Ratio of driving wheelbase to overall engine wheebase 0.55
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)111,700
Engine Weight (lbs)146,500
Tender Loaded Weight (lbs)88,000
Total Engine and Tender Weight (lbs)234,500
Tender Water Capacity (gals)4500
Tender Fuel Capacity (oil/coal) (gals/tons)2000
Minimum weight of rail (calculated) (lb/yd)62
Geometry Relating to Tractive Effort
Driver Diameter (in)63
Boiler Pressure (psi)200
High Pressure Cylinders (dia x stroke) (in)19" x 26"
Tractive Effort (lbs)25,327
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.41
Heating Ability
Firebox Area (sq ft)166
Grate Area (sq ft)28.20
Evaporative Heating Surface (sq ft)2333
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)2333
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

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