Central Pasto Viejo 2-8-0 "Consolidation" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 7 (Locobase 15422)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 79. p. 64. See also Carlos Vinotio, "Central Pasto Viejo", Louisiana Planter and Sugar Manufacturer, Vol LX, No. 26 (29 June 1918) pp. 411-412 and "Humacao" at http://www.prfrogui.com/home/humacao.htm, last accessed 9 September 2013. Works numbers were 60180-60181 in September 1927.

This sugar mill was based at Humacao, which is located on the east coast about 60 km (37.3 miles) southeast of San Juan. Founded in 1904, the CPV struggled mightily until a "group of determined capitalists" founded the Federal Syndicate of Humacao in 1914. They operated the Central for a year while it stood in receivership, then bought the mill outright and reorganized as the Central Pasto Viejo Incorporated.

The Central's presence in Humacao was unavoidable, according to the Humacao history, as the smoke from its stacks (and those of El Ejemplo) "blanketed and obscured the area, reminiscent of the city of Pittsburgh" [Locobase translation]. It was in those years that the town acquired its nickname "the Grey City".

The CPV's railway was laid on 40 lb/yard (20 kg/metre) rail. Its tightest curve radii of 131 feet (40 metres) combined with 2% and 3% curves with a maximum grade of 3 1/2% combined with a curve radius of 164 feet (50 metres).

Before delivery, Extra Order 1925-1928 (15 September 1928) dictated a 9 3/8" widening in the gauge. New tires measured 2 1/2" (63.5 mm) thick by 5" (127 mm) wide on the front and rear driver sets, which were flanged, and 2 1/2" x 5 1/2" on the intermediate sets (axle #3 was the driven one), which were plain (or "blind").

Specifications by Steve Llanso of Sweat House Media
Locobase ID15,422
RailroadCentral Pasto Viejo
Number in Class2
Road Numbers7-8
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)10
Engine Wheelbase (ft)16.17
Ratio of driving wheelbase to overall engine wheebase 0.62
Overall Wheelbase (engine & tender) (ft)38.85
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)60,000
Engine Weight (lbs)67,500
Tender Loaded Weight (lbs)39,000
Total Engine and Tender Weight (lbs)106,500
Tender Water Capacity (gals)1800
Tender Fuel Capacity (oil/coal) (gals/tons)3
Minimum weight of rail (calculated) (lb/yd)25
Geometry Relating to Tractive Effort
Driver Diameter (in)36
Boiler Pressure (psi)170
High Pressure Cylinders (dia x stroke) (in)14" x 18"
Tractive Effort (lbs)14,161
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.24
Heating Ability
Firebox Area (sq ft)51
Grate Area (sq ft)16
Evaporative Heating Surface (sq ft)829
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)829
Evaporative Heating Surface/Cylinder Volume258.49
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2720
Same as above plus superheater percentage2720
Same as above but substitute firebox area for grate area8670
Power L13448
Power MT506.77

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