Jefferson & North Western 4-6-0 "Ten-wheeler" Locomotives of 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.

Specifications by Steve Llanso of Sweat House Media
Locobase ID14,120
RailroadJefferson & North Western
Number in Class1
Road Numbers7
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)12.83
Engine Wheelbase (ft)23.15
Ratio of driving wheelbase to overall engine wheebase 0.55
Overall Wheelbase (engine & tender) (ft)47.42
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)74,000
Engine Weight (lbs)98,000
Tender Loaded Weight (lbs)50,000
Total Engine and Tender Weight (lbs)148,000
Tender Water Capacity (gals)4000
Tender Fuel Capacity (oil/coal) (gals/tons)7
Minimum weight of rail (calculated) (lb/yd)41
Geometry Relating to Tractive Effort
Driver Diameter (in)50
Boiler Pressure (psi)180
High Pressure Cylinders (dia x stroke) (in)16" x 24"
Tractive Effort (lbs)18,801
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.94
Heating Ability
Firebox Area (sq ft)90
Grate Area (sq ft)15.50
Evaporative Heating Surface (sq ft)1222
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1222
Evaporative Heating Surface/Cylinder Volume218.80
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 L14491
Power MT401.39

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