Pacifico de Nicaragua 4-6-0 Locomotives in Nicaragua


Class Details by Steve Llanso of Sweat House Media

Class 100 (Locobase 14190)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 49, p 109 Works number was 34008 in November 1909.

It was the London-based Ethelburga Syndicate, Ltd that actually negotiated the sale of this small Ten-wheeler to the Nicaraguan railway.


Class 23 (Locobase 14191)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 49, p 111. Works numbers were 39902-39903 in May 1913.

J G White Engineering Corporation of #43 Exchange Place, New York City, ordered these oil-burning Ten-wheelers for the Pacifico to operate on the 40 lb/yard (20 kg/metre) rail, up 3% grades, and around relatively gentle 10 degree curves. (Two similar Consolidations are shown in Locobase 14192). The firebox was lined with fire brick for oil burning and Baldwin's "standard oil burning arrangement" placed the burner in the front end of the firebox.

The specs also include a common post-delivery "Hereafter" note, in this instance dated 10 May 1915, that acknowledged the stresses encountered by these small engines operating in rough circumstances: "The equalizing beam links to be made stronger."

Principal Dimensions by Steve Llanso of Sweat House Media

Class10023
Locobase ID14190 14191
RailroadPacifico de NicaraguaPacifico de Nicaragua
CountryNicaraguaNicaragua
Whyte4-6-04-6-0
Number in Class12
Road Numbers10023-24
Gauge3'6"3'6"
Number Built12
BuilderBaldwinBaldwin
Year19091913
Valve GearStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.92 / 3.3311.33 / 3.45
Engine Wheelbase (ft / m)19.50 / 5.9419.50 / 5.94
Ratio of driving wheelbase to overall engine wheelbase 0.56 0.58
Overall Wheelbase (engine & tender) (ft / m)39.08 / 11.9140.08 / 12.22
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)35,000 / 15,87643,000 / 19,504
Engine Weight (lbs / kg)48,000 / 21,77259,000 / 26,762
Tender Loaded Weight (lbs / kg)29,000 / 13,15440,000 / 18,144
Total Engine and Tender Weight (lbs / kg)77,000 / 34,92699,000 / 44,906
Tender Water Capacity (gals / ML)1600 / 6.062000 / 7.58
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)900 / 3407
Minimum weight of rail (calculated) (lb/yd / kg/m)19 / 9.5024 / 12
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42 / 106743 / 1092
Boiler Pressure (psi / kPa)150 / 10.30180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)12" x 18" / 305x45712" x 18" / 305x457
Tractive Effort (lbs / kg)7869 / 3569.329223 / 4183.49
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.45 4.66
Heating Ability
Tubes (number - dia) (in / mm)151 - 1.5" / 38134 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.67 / 2.95 9.83 / 3
Firebox Area (sq ft / m2)68 / 6.3268 / 6.32
Grate Area (sq ft / m2) 9.40 / 0.8710.70 / 0.99
Evaporative Heating Surface (sq ft / m2)633 / 58.81667 / 61.99
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)633 / 58.81667 / 61.99
Evaporative Heating Surface/Cylinder Volume268.65283.08
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation14101926
Same as above plus superheater percentage14101926
Same as above but substitute firebox area for grate area10,20012,240
Power L143365513
Power MT819.36847.96

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