Midland & South-Western Junction 4-4-4 Locomotives in Great_Britain


Class Details by Steve Llanso of Sweat House Media

Class 17 (Locobase 10097)

Data from "Twelve-Wheeled Double Bogie Tank Engine, Midland & South-Western Junction Railway," The Locomotive & Railway Carriage & Wagon Review, Vol III (July 1898), p. 100.

This pair of bogie tanks were considerably heavier than the freight engines that would join them in a year or so (Locobase 10156). LM suggested that, while of unusual design, they "should be well adapted to the working conditions of a railway, abouinding in curves, having few watering stations, and a traffic necessitating the engines running either end first."

Perhaps, but the 17 & 18 must not have recommended themselves to the GWR, because they didn't survive their amalgamation with the GWR's own tank engines for very long. 25 was scrapped in 1927 and 27, although rebuilt in 1925, was scrapped in 1929.

Principal Dimensions by Steve Llanso of Sweat House Media

Class17
Locobase ID10097
RailroadMidland & South-Western Junction (MSWJ)
CountryGreat Britain
Whyte4-4-4T
Number in Class2
Road Numbers17-18 / 25, 27
GaugeStd
Number Built2
BuilderSharp, Stewart
Year1897
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.50 / 2.29
Engine Wheelbase (ft / m)31.62 / 9.64
Ratio of driving wheelbase to overall engine wheelbase 0.24
Overall Wheelbase (engine & tender) (ft / m)31.62 / 9.64
Axle Loading (Maximum Weight per Axle) (lbs / kg)32,704 / 14,834
Weight on Drivers (lbs / kg)86,464 / 39,219
Engine Weight (lbs / kg)132,720 / 60,201
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)132,720 / 60,201
Tender Water Capacity (gals / ML)2280 / 8.64
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)72 / 36
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 1600
Boiler Pressure (psi / kPa)140 / 9.70
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x610
Tractive Effort (lbs / kg)13,101 / 5942.52
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.60
Heating Ability
Tubes (number - dia) (in / mm)194 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)95 / 8.83
Grate Area (sq ft / m2)17 / 1.58
Evaporative Heating Surface (sq ft / m2)1050 / 97.58
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1050 / 97.58
Evaporative Heating Surface/Cylinder Volume166.53
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2380
Same as above plus superheater percentage2380
Same as above but substitute firebox area for grate area13,300
Power L13556
Power MT181.34

All material Copyright © SteamLocomotive.com
Wes Barris