Data from "'Mikado Type' Locomotive, Soudan [sic] Government Railways", Locomotive Magazine, Volume 27 (15 March 1921), pp. 55-57.
As was true of most SGR locomotives, this class was built to the design of Mr.
C. G. Hodgson , Chief Mechanical Engineer, Atbara in the Sudan. Its outside constant-lead radial valve gear actuated 10" (254 mm) piston valves.
Data from "'Mikado Type' Locomotive for Kassala Extension Line, Sudan Government Railways", Locomotive Magazine, Volume XXX [30], No. 362 ( 14 June 1924), p . Works numbers were 3861-3870 in 1924.
As was true of most SGR locomotives, this class was built to the design of Mr.
C. G. Hodgson , Chief Mechanical Engineer, Atbara in the Sudan. Its outside constant-lead radial valve gear actuated piston valves. A Weir feed water heater added energy to the boiler.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | 150 | 180 |
Locobase ID | 20057 | 21164 |
Railroad | Sudan Railway | Sudan Railway |
Country | Sudan | Sudan |
Whyte | 2-8-2 | 2-8-2 |
Number in Class | 10 | |
Road Numbers | 180-189 | |
Gauge | 3'6" | 3'6" |
Number Built | 10 | |
Builder | North British | Robert Stephenson & Co |
Year | 1921 | 1924 |
Valve Gear | Walschaert | Walschaert |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 10 / 3.05 | 14 / 4.27 |
Engine Wheelbase (ft / m) | 25.75 / 7.85 | 28 / 8.53 |
Ratio of driving wheelbase to overall engine wheelbase | 0.39 | 0.50 |
Overall Wheelbase (engine & tender) (ft / m) | 52.67 / 16.05 | 53.17 / 16.21 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 24,752 / 11,227 | |
Weight on Drivers (lbs / kg) | 98,000 / 44,452 | |
Engine Weight (lbs / kg) | 169,568 / 76,915 | 136,864 / 62,081 |
Tender Loaded Weight (lbs / kg) | 122,500 / 55,565 | 108,080 / 49,024 |
Total Engine and Tender Weight (lbs / kg) | 292,068 / 132,480 | 244,944 / 111,105 |
Tender Water Capacity (gals / ML) | 6000 / 22.73 | 4800 / 18.18 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8 / 7 | 8.80 / 8 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 41 / 20.50 | |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 54 / 1372 | 51 / 1295 |
Boiler Pressure (psi / kPa) | 160 / 1100 | 165 / 1140 |
High Pressure Cylinders (dia x stroke) (in / mm) | 21" x 27" / 533x686 | 19" x 24" / 483x610 |
Tractive Effort (lbs / kg) | 29,988 / 13602.34 | 23,826 / 10807.30 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.11 | |
Heating Ability | ||
Tubes (number - dia) (in / mm) | - 2" / 51 | - 2" / 51 |
Flues (number - dia) (in / mm) | - 5" / 127 | - 5" / 127 |
Flue/Tube length (ft / m) | 15.54 / 4.74 | 15.54 / 4.74 |
Firebox Area (sq ft / m2) | 155 / 14.40 | 155 / 14.40 |
Grate Area (sq ft / m2) | 33.10 / 3.08 | 26 / 2.42 |
Evaporative Heating Surface (sq ft / m2) | 1269 / 117.89 | 1165 / 108.23 |
Superheating Surface (sq ft / m2) | 268 / 24.90 | 260 / 24.15 |
Combined Heating Surface (sq ft / m2) | 1537 / 142.79 | 1425 / 132.38 |
Evaporative Heating Surface/Cylinder Volume | 117.24 | 147.92 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 5296 | 4290 |
Same as above plus superheater percentage | 6196 | 5062 |
Same as above but substitute firebox area for grate area | 29,016 | 30,179 |
Power L1 | 5928 | 7622 |
Power MT | 685.86 |