Quanah, Acme & Pacific 2-8-0 "Consolidation" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 101 (Locobase 13509)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 51, p. 291. See Locobase 13508 for a brief history of the QA & P. Works number was 42200 in July 1915.

As the Quanah Route developed its cross-Texas traffic, a Consolidation was an inevitable addition to any such aspiring line. Like the earlier Baldwin Ten-wheelers shown in Locobase 13508, this was a mid-sized example at best with a relatively modest amount of superheat.

(The Quanah Route would later operate an undeliverable Russian decapod as their 1628.)

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID13,509
RailroadQuanah, Acme & Pacific
Number in Class1
Road Numbers101
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.25 / 4.34
Engine Wheelbase (ft / m)21.83 / 6.65
Ratio of driving wheelbase to overall engine wheebase 0.65
Overall Wheelbase (engine & tender) (ft / m)55.50 / 16.92
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)140,600 / 63,775
Engine Weight (lbs / kg)156,400 / 70,942
Tender Loaded Weight (lbs / kg)140,000 / 63,503
Total Engine and Tender Weight (lbs / kg)296,400 / 134,445
Tender Water Capacity (gals / ML)7000 / 26.52
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)12 / 10.90
Minimum weight of rail (calculated) (lb/yd / kg/m)59 / 29.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)52 / 1321
Boiler Pressure (psi / kPa)185 / 12.80
High Pressure Cylinders (dia x stroke) (in / mm)20" x 26" / 508x660
Tractive Effort (lbs / kg)31,450 / 14265.50
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.47
Heating Ability
Firebox Area (sq ft / m2)167 / 15.51
Grate Area (sq ft / m2)31.40 / 2.92
Evaporative Heating Surface (sq ft / m2)1668 / 154.96
Superheating Surface (sq ft / m2)319 / 29.64
Combined Heating Surface (sq ft / m2)1987 / 184.60
Evaporative Heating Surface/Cylinder Volume176.44
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5809
Same as above plus superheater percentage6738
Same as above but substitute firebox area for grate area35,838
Power L19114
Power MT571.63

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