Orange & Northwestern 4-6-0 "Ten-Wheeler" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 106/TN-57 - 233 (Locobase 7753)

Data from MP SUBS 7 - 1935 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also Robert Wooster and Nancy Young, "Orange and Northwestern Railroad," Handbook of Texas Online, accessed July 03, 2022, [link]. Works numbers were 38702-38703 in October 1905.

Established in 1901 to rebuild a tram road to transport logs from southeast Texas pine forests, the O&NW as laid out connected Orange with the 30-miles (48 km) distant Buna Junction on the Gulf, Beaumont and Kansas City railroad. That segment opened in March 1902.

When Benjamin F Yoakum acquired the O&NW in 1905, he extended the line another 28 miles (45 km) north to Newton. It was to serve the construction of that segment that these two Ten-wheelers came on the line. Not long after the extension opened, the Colorado Southern, New Orleans & Pacific Railroad acquired the O&NW.

In 1910, the CSNO&P changed its name to the New Orleans, Texas & Mexico. In 1916, these two engines were transferred to the St Louis, Burlington & Iron Mountain, but kept their road numbers. Still later, they took MP numbers 234, 233. 234 fell under the ferro-knacker's torch in March 1934.

Principal Dimensions by Steve Llanso of Middle Run Media
Class106/TN-57 - 233
Locobase ID7753
RailroadOrange & Northwestern (NOT & M/MP)
CountryUSA
Whyte4-6-0
Number in Class2
Road Numbers39, 38/234, 233
GaugeStd
Number Built2
BuilderAlco-Cooke
Year1905
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.50 / 3.51
Engine Wheelbase (ft / m)21.33 / 6.50
Ratio of driving wheelbase to overall engine wheelbase 0.54
Overall Wheelbase (engine & tender) (ft / m)47.54 / 14.49
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)93,000 / 42,184
Engine Weight (lbs / kg)123,000 / 55,792
Tender Loaded Weight (lbs / kg)115,000 / 52,163
Total Engine and Tender Weight (lbs / kg)238,000 / 107,955
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)2300 / 8706
Minimum weight of rail (calculated) (lb/yd / kg/m)52 / 26
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)57 / 1448
Boiler Pressure (psi / kPa)180 / 1240
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x610
Tractive Effort (lbs / kg)20,872 / 9467.39
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.46
Heating Ability
Tubes (number - dia) (in / mm)220 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12 / 3.66
Firebox Area (sq ft / m2)135 / 12.54
Grate Area (sq ft / m2)24.50 / 2.28
Evaporative Heating Surface (sq ft / m2)1507 / 140.06
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1507 / 140.06
Evaporative Heating Surface/Cylinder Volume213.15
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4410
Same as above plus superheater percentage4410
Same as above but substitute firebox area for grate area24,300
Power L15278
Power MT375.35

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