Trinity & Brazos Valley 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class C-3HI (Locobase 14105)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 29, p. 276. See also Nancy Beck Young, "TRINITY AND BRAZOS VALLEY RAILWAY," Handbook of Texas Online ([]), accessed May 01, 2012. Published by the Texas State Historical Association. Works numbers were 31329, 31356-31357, 31381, 31411 in July 1907.

The Valley Road (or, as it was better known, the Boll Weevil) was a Texas road that began construction in 1902 between Hillsboro (about 45 miles south of Fort Worth) southeast to Mexia and northwest from Hillsboro to Cleburne. This 77-mile line wasn't as profitable as hoped and its original investors sold out to the Colorado & Southern in 1905; the C&S sold half of its interest to the Rock Island. Suitably juiced with more capital, the T & BV built 224 more miles in two years; the main line then stretched from Waxahachie southeast to Houston. The T&BV also had trackage rights from Houston to Galveston on the C&S's Gulf, Colorado and Santa Fe.

One benefit was joint orders for locomotives from Baldwin. This quintet was produced at the same time as the C & S's identical class shown in Locobased 14104. They were a good size and weight and had drivers suitable for most passenger service on the relatively unchallenging profile.

Never especially profitable, the T&BV entered into receivership in 1916. It was reorganized in 1930, taking the names of its two biggest sponsors in the new entity: Burlington Rock Island.

48-49 were scrapped in 1931. 51 followed in 1936, 50 in 1937, and 47 in 1939.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID14105
RailroadTrinity & Brazos Valley
Number in Class5
Road Numbers47-51
Number Built5
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)15 / 4.57
Engine Wheelbase (ft / m)26.17 / 7.98
Ratio of driving wheelbase to overall engine wheelbase 0.57
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)138,500 / 62,823
Engine Weight (lbs / kg)179,500 / 81,420
Tender Loaded Weight (lbs / kg)142,000 / 64,410
Total Engine and Tender Weight (lbs / kg)321,500 / 145,830
Tender Water Capacity (gals / ML)8000 / 30.30
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)10 / 9
Minimum weight of rail (calculated) (lb/yd / kg/m)77 / 38.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)69 / 1753
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)21" x 28" / 533x711
Tractive Effort (lbs / kg)30,423 / 13799.66
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.55
Heating Ability
Tubes (number - dia) (in / mm)294 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)14.83 / 4.52
Firebox Area (sq ft / m2)194.50 / 18.07
Grate Area (sq ft / m2)32.60 / 3.03
Evaporative Heating Surface (sq ft / m2)2465 / 229
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2465 / 229
Evaporative Heating Surface/Cylinder Volume219.70
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6520
Same as above plus superheater percentage6520
Same as above but substitute firebox area for grate area38,900
Power L17047
Power MT336.52

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