Zarraga & Company 2-8-0 "Consolidation" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class Adela 4 (Locobase 12646)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 25, p. 132. Works numbers were 21308 in November 1902, 29764 in December 1906 and and 32813 in June 1908.

Grades of 4% and 75-ft radius curves were common challenges for metre-gauge Consolidations like these Adelas.

Specifications by Steve Llanso of Sweat House Media
ClassAdela 4
Locobase ID12646
RailroadZarraga & Company
CountryUSA
Whyte2-8-0
Number in Class2
Road Numbers4-6
Gauge3'
Number Built2
BuilderBurnham, Williams & Co
Year1902
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 9.83'
Engine Wheelbase17.17'
Ratio of driving wheelbase to overall engine wheebase 0.57
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers68000 lbs
Engine Weight77000 lbs
Tender Light Weight37000 lbs
Total Engine and Tender Weight114000 lbs
Tender Water Capacity1500 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)28 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter36"
Boiler Pressure160 psi
Cylinders (dia x stroke)14.5" x 20"
Tractive Effort15886 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.28
Heating Ability
Firebox Area56.20 sq. ft
Grate Area11.59 sq. ft
Evaporative Heating Surface978 sq. ft
Superheating Surface
Combined Heating Surface978 sq. ft
Evaporative Heating Surface/Cylinder Volume255.86
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1854
Same as above plus superheater percentage1854
Same as above but substitute firebox area for grate area8992
Power L13162
Power MT410.06


If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.