Madras & Southern Mahratta 4-8-0 Locomotives in India


Class Details by Steve Llanso of Sweat House Media

Class 500 (Locobase 20912)

Data from "New 4-8-0 Type Locomotives for the Madras & Southern Mahratta Railway", Railway Engineer, Volume 46, No 7 (July 1925), pp. 243-245.

Principal Dimensions by Steve Llanso of Sweat House Media

Class500
Locobase ID20912
RailroadMadras & Southern Mahratta
CountryIndia
Whyte4-8-0
Number in Class4
Road Numbers
GaugeMetre
Number Built4
BuilderWG Bagnall
Year1925
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)12 / 3.66
Engine Wheelbase (ft / m)20.50 / 6.25
Ratio of driving wheelbase to overall engine wheelbase 0.59
Overall Wheelbase (engine & tender) (ft / m)42.31 / 12.90
Axle Loading (Maximum Weight per Axle) (lbs / kg)19,488 / 8840
Weight on Drivers (lbs / kg)77,280 / 35,054
Engine Weight (lbs / kg)95,872 / 43,487
Tender Loaded Weight (lbs / kg)65,408 / 29,669
Total Engine and Tender Weight (lbs / kg)161,280 / 73,156
Tender Water Capacity (gals / ML)3180 / 12.05
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 4.95 / 4.50
Minimum weight of rail (calculated) (lb/yd / kg/m)32 / 16
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)45 / 1143
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)17" x 22" / 432x559
Tractive Effort (lbs / kg)19,215 / 8715.79
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.02
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)124 / 11.52
Grate Area (sq ft / m2)16.60 / 1.54
Evaporative Heating Surface (sq ft / m2)909 / 84.45
Superheating Surface (sq ft / m2)150 / 13.94
Combined Heating Surface (sq ft / m2)1059 / 98.39
Evaporative Heating Surface/Cylinder Volume157.28
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2656
Same as above plus superheater percentage3028
Same as above but substitute firebox area for grate area22,618
Power L15978
Power MT682.15

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