San Antonio, Uvalde & Gulf 4-4-0 "American" Locomotives in the USA

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Class Details by Steve Llanso of Sweat House Media

Class 5 / E-63 (Locobase 13736)

Data from MP 8-1936 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. Works number was 1229 in 1912.

This little American owns a couple of distinctions. It was the only locomotive bought new by the Sausage Route and it was one of the first rod-driven engines to be supplied by Lima. It was small, oil-fired, and not especially noteworthy, but useful and long-lived.

Specifications by Steve Llanso of Sweat House Media
Class 5 / E-63
Locobase ID13,736
RailroadSan Antonio, Uvalde & Gulf (NOT & M/MP)
Number in Class1
Road Numbers5 / 932
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.08 / 2.77
Engine Wheelbase (ft / m)21 / 6.40
Ratio of driving wheelbase to overall engine wheebase 0.43
Overall Wheelbase (engine & tender) (ft / m)51.92 / 15.83
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)74,700 / 33,883
Engine Weight (lbs / kg)120,740 / 54,767
Tender Loaded Weight (lbs / kg)108,810 / 49,355
Total Engine and Tender Weight (lbs / kg)229,550 / 104,122
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)2310 / 8.80
Minimum weight of rail (calculated) (lb/yd / kg/m)62 / 31
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 1600
Boiler Pressure (psi / kPa)175 / 12.10
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x610
Tractive Effort (lbs / kg)18,360 / 8327.97
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.07
Heating Ability
Firebox Area (sq ft / m2)113 / 10.50
Grate Area (sq ft / m2)17 / 1.58
Evaporative Heating Surface (sq ft / m2)1495 / 138.89
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1495 / 138.89
Evaporative Heating Surface/Cylinder Volume211.50
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2975
Same as above plus superheater percentage2975
Same as above but substitute firebox area for grate area19,775
Power L15355
Power MT316.08