San Luis Central 2-8-0 "Consolidation" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class Little Nell (Locobase 14244)

Data from DeGolyer, Vol 51, pp. 286+. See also the photo and caption at, last accessed 27 June 2012; and P. R. "Bob" Griswold and Phelps R. GTra ), p. 37.. Works number was 41017 in December 1913.

The "Pea Vine" was built in 1913 to convey sugar beets to a mill located along its 13-mile (20.9-km) right-of-way from Sugar Junction (near Monte Vista) to Center, Colo. After that crop's mill closed within a year, the region exploited its climate's suitability for growing potatos.

According to the caption of a 1953 Fred Springer photograph: "For 42 years [#1] ran back and forth over arrow-straight track without ever turning around at either terminal. The SLC did not have a caboose, obliging the train crew to ride in the engine's cab or in the doghouse atop the tender." Obviously, the lack of a trailing truck meant little at the low speeds at which the trains operated.

The Griswolds are the source for the locomotive's name as well as for the comment that empty potato trains might string as many as 114 cars. Locobase figures the return trips must have consisted of much shorter trains.

Specifications by Steve Llanso of Sweat House Media
ClassLittle Nell
Locobase ID14244
RailroadSan Luis Central
Number in Class1
Road Numbers1
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase14.50'
Engine Wheelbase22'
Ratio of driving wheelbase to overall engine wheebase 0.66
Overall Wheelbase (engine & tender)51.19'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers115500 lbs
Engine Weight131000 lbs
Tender Light Weight90000 lbs
Total Engine and Tender Weight221000 lbs
Tender Water Capacity4500 gals
Tender Fuel Capacity (oil/coal)7 tons
Minimum weight of rail (calculated)48 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter50"
Boiler Pressure180 psi
Cylinders (dia x stroke)20" x 24"
Tractive Effort29376 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.93
Heating Ability
Firebox Area144 sq. ft
Grate Area30.30 sq. ft
Evaporative Heating Surface1774 sq. ft
Superheating Surface
Combined Heating Surface1774 sq. ft
Evaporative Heating Surface/Cylinder Volume203.29
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5454
Same as above plus superheater percentage5454
Same as above but substitute firebox area for grate area25920
Power L14287
Power MT327.31

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