Jefferson & North Western 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 7 (Locobase 14120)

Data from DeGolyer, Volume 43, p. 213. See also Nancy Beck Young, "JEFFERSON AND NORTHWESTERN RAILWAY," Handbook of Texas Online ([]), accessed May 04, 2012. Published by the Texas State Historical Association.. Works number was 38855 in November 1912.

Although chartered in 1899, the J&NW didn't start building its line in Cass County, Texas (just south of Texarkana) until 1912, when it constructed 36 miles in two segments, one between Jefferson and Camp and another between Givens and Linden. In a pattern unusual for shortlines that started business so relatively late in the steam era, the J&NW added track after its initial completion. Camp and Marietta-four miles apart--were joined in 1917 and that line was extended another nine miles to Naples in 1926.

Like most of the other shortlines, however, the J&NW's fortunes collapsed under the weight of the Great Depression and increased motor traffic competition. The Linden-Naples section was abandoned in 1933 and the rest was sold under foreclosure in August 1934 to the Jefferson & Northwestern Railroad Company, which operated the remaining track until 9 September 1941.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID14120
RailroadJefferson & North Western
Number in Class1
Road Numbers7
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.83 / 3.91
Engine Wheelbase (ft / m)23.15 / 7.06
Ratio of driving wheelbase to overall engine wheelbase 0.55
Overall Wheelbase (engine & tender) (ft / m)47.42 / 14.45
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)74,000 / 33,566
Engine Weight (lbs / kg)98,000 / 44,452
Tender Loaded Weight (lbs / kg)50,000 / 22,680
Total Engine and Tender Weight (lbs / kg)148,000 / 67,132
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)7 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)41 / 20.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)50 / 1270
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610
Tractive Effort (lbs / kg)18,801 / 8528.00
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.94
Heating Ability
Tubes (number - dia) (in / mm)178 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.23 / 3.73
Firebox Area (sq ft / m2)90 / 8.36
Grate Area (sq ft / m2)15.50 / 1.44
Evaporative Heating Surface (sq ft / m2)1222 / 113.53
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1222 / 113.53
Evaporative Heating Surface/Cylinder Volume218.60
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2790
Same as above plus superheater percentage2790
Same as above but substitute firebox area for grate area16,200
Power L14487
Power MT401.03

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