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.

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 3 engines were among the newest of the SA, U & G's stud when it was taken over by the NO, T & M in the 1920s. 1003 and 1001 were scrapped at Palestine, Tex in May and September 1934, respectively.


Class 26 / C-55 (Locobase 13737)

Data from MP 8-1936 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.


Class 27 / C-55 (Locobase 13738)

Data from MP 8-1936 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Principal Dimensions by Steve Llanso of Sweat House Media
Class23 / C-34 - 27.226 / C-5527 / C-55
Locobase ID7818 13,737 13,738
RailroadSan Antonio, Uvalde & Gulf (NOT & M/MP)San Antonio, Uvalde & Gulf (NOT & M/MP)San Antonio, Uvalde & Gulf (NOT & M/MP)
CountryUSAUSAUSA
Whyte2-8-02-8-02-8-0
Number in Class333
Road Numbers23-25 / 1001-100326 / 100627-27 / 1007-1008
GaugeStdStdStd
Number Built333
BuilderAlcoAlcoAlco
Year191319061906
Valve GearWalschaertWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14 / 4.2715 / 4.5715 / 4.57
Engine Wheelbase (ft / m)21.83 / 6.6523.08 / 7.0323.08 / 7.03
Ratio of driving wheelbase to overall engine wheebase 0.64 0.65 0.65
Overall Wheelbase (engine & tender) (ft / m)56.33 / 17.1759.72 / 18.2059.72 / 18.20
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)128,270 / 58,182139,000 / 63,049139,000 / 63,049
Engine Weight (lbs / kg)145,030 / 65,785155,200 / 70,398155,200 / 70,398
Tender Loaded Weight (lbs / kg)129,300 / 58,650112,427 / 50,996112,427 / 50,996
Total Engine and Tender Weight (lbs / kg)274,330 / 124,435267,627 / 121,394267,627 / 121,394
Tender Water Capacity (gals / ML)6000 / 22.736090 / 23.076090 / 23.07
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)2741 / 10.402646 / 102646 / 10
Minimum weight of rail (calculated) (lb/yd / kg/m)53 / 26.5058 / 2958 / 29
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 137255 / 139755 / 1397
Boiler Pressure (psi / kPa)180 / 12.40180 / 12.40180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)20" x 24" / 508x61020" x 26" / 508x66020" x 26" / 508x660
Tractive Effort (lbs / kg)27,200 / 12337.7328,931 / 13122.9028,931 / 13122.90
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.72 4.80 4.80
Heating Ability
Firebox Area (sq ft / m2)155 / 14.41162 / 15.05162 / 15.05
Grate Area (sq ft / m2)31 / 2.8832 / 2.9732 / 2.97
Evaporative Heating Surface (sq ft / m2)1438 / 133.641497 / 139.072045 / 189.99
Superheating Surface (sq ft / m2)295 / 27.42320
Combined Heating Surface (sq ft / m2)1733 / 161.061817 / 139.072045 / 189.99
Evaporative Heating Surface/Cylinder Volume164.78158.35216.31
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation558057605760
Same as above plus superheater percentage652967975760
Same as above but substitute firebox area for grate area32,64334,40929,160
Power L1903790534983
Power MT621.29574.34316.13