San Antonio, Uvalde & Gulf 2-8-0 "Consolidation" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 23/C-34 - 27.2 (Locobase 7818)

Data from MP SUBS 7 - 1935 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers 53007 and 54381-54382 in 1913.

Locobase 7819 describes the orgins of this southern Texas railroad. The current entry shows a Consolidation of modest proportions and small drivers; few superheated 2-8-0s were as small.

The three engines were among the newest of the SAU&G's stud when it was taken over by the New Orleans, Texas & Mexico in the 1920s. 1003 and 1001 were scrapped at Palestine, Tex in May and September 1934, respectively.

Principal Dimensions by Steve Llanso of Sweat House Media

Class23/C-34 - 27.2
Locobase ID7818
RailroadSan Antonio, Uvalde & Gulf (NOT & M/MP)
CountryUSA
Whyte2-8-0
Number in Class3
Road Numbers23-25/1001-1003
GaugeStd
Number Built3
BuilderAlco-Pittsburgh
Year1913
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14 / 4.27
Engine Wheelbase (ft / m)21.83 / 6.65
Ratio of driving wheelbase to overall engine wheelbase 0.64
Overall Wheelbase (engine & tender) (ft / m)56.33 / 17.17
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)128,270 / 58,182
Engine Weight (lbs / kg)145,030 / 65,785
Tender Loaded Weight (lbs / kg)129,300 / 58,650
Total Engine and Tender Weight (lbs / kg)274,330 / 124,435
Tender Water Capacity (gals / ML)6000 / 22.73
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)2741 / 10,375
Minimum weight of rail (calculated) (lb/yd / kg/m)53 / 26.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 1372
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)20" x 24" / 508x610
Tractive Effort (lbs / kg)27,200 / 12337.73
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.72
Heating Ability
Tubes (number - dia) (in / mm)128 - 2" / 51
Flues (number - dia) (in / mm)20 - 5.375" / 137
Flue/Tube length (ft / m)13.42 / 4.09
Firebox Area (sq ft / m2)155 / 14.40
Grate Area (sq ft / m2)31 / 2.88
Evaporative Heating Surface (sq ft / m2)1438 / 133.64
Superheating Surface (sq ft / m2)295 / 27.42
Combined Heating Surface (sq ft / m2)1733 / 161.06
Evaporative Heating Surface/Cylinder Volume164.72
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5580
Same as above plus superheater percentage6529
Same as above but substitute firebox area for grate area32,643
Power L19033
Power MT621.01

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