Rhodesian Railways 4-8-2 Locomotives in South_Africa


Class Details by Steve Llanso of Sweat House Media

Class 316 (Locobase 12791)

Data from D F Holland, Steam Locomotives of the South African Railways, Volume 2: 1910-1955 (1972). Works numbers were 27386-27405.

See Locobase 12790 for the South African "Dollies", the large class of Mountains built for the SAR from 1937 to 1953. This order was supplied by a different builder to the same design.

Principal Dimensions by Steve Llanso of Middle Run Media

Class316
Locobase ID12791
RailroadRhodesian Railways
CountrySouth Africa
Whyte4-8-2
Number in Class20
Road Numbers316-335
Gauge3'6"
Number Built20
BuilderHenschel & Sohn
Year1951
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.42 / 4.40
Engine Wheelbase (ft / m)32.25 / 9.83
Ratio of driving wheelbase to overall engine wheelbase 0.45
Overall Wheelbase (engine & tender) (ft / m)58.62 / 17.87
Axle Loading (Maximum Weight per Axle) (lbs / kg)31,248 / 14,174
Weight on Drivers (lbs / kg)123,760 / 56,137
Engine Weight (lbs / kg)178,304 / 80,877
Tender Loaded Weight (lbs / kg)164,304 / 74,527
Total Engine and Tender Weight (lbs / kg)342,608 / 155,404
Tender Water Capacity (gals / ML)4250 / 16.10
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)10 / 9
Minimum weight of rail (calculated) (lb/yd / kg/m)52 / 26
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 1372
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)21" x 26" / 533x660
Tractive Effort (lbs / kg)36,097 / 16373.34
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.43
Heating Ability
Tubes (number - dia) (in / mm)76 - 2.5" / 64
Flues (number - dia) (in / mm)24 - 5.5" / 140
Flue/Tube length (ft / m)20.17 / 6.15
Firebox Area (sq ft / m2)139 / 12.92
Grate Area (sq ft / m2)36 / 3.35
Evaporative Heating Surface (sq ft / m2)1839 / 170.91
Superheating Surface (sq ft / m2)390 / 36.25
Combined Heating Surface (sq ft / m2)2229 / 207.16
Evaporative Heating Surface/Cylinder Volume176.44
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation7200
Same as above plus superheater percentage8424
Same as above but substitute firebox area for grate area32,526
Power L110,438
Power MT743.76

All material Copyright © SteamLocomotive.com
Wes Barris