Ceylon Government Railway 4-6-0T Locomotives in Ceylon


Class Details by Steve Llanso of Sweat House Media

Class B2 (Locobase 20924)

Data from "Passenger Engine and Tender for the Ceylon Government Railway", Vulcan Foundry Locomotive Catalogue, No. 35, found on Flicker's Historical Locomotive Images website at [link], last accessed 3 Agust 2021. See also Eng. Udaya Peeligama, "A Concise History Of Motive Power Development On Sri Lankan Railways", presented on the Institution of Engineers Sri Lanka-New South Wales Chapter website at [link], posted 7 September 2018, last accessed 3 August 2021. .(Many thanks to Jorge Cerezo Toledo for his 26 June 2021 email containing links to several sites including the Vulcan Catalogue referred to above.) Vulcan works numbers were 3547, 3548, 3552 - 3555 in 1922 and 3858-3862, 3932-3941 in 1925. Kitson supplied 3, Robert Stephenson & Company 11 (works numbers were 3787-3797 in 1920).

These broad gauge Ten-wheelers were part of the long run of B-type locomotives also known as Nanu Oya. Eng. Peeligama notes that the 945 Imp gal of water (1,134 US gallons,4,292 litres) in the side tanks of these B2s tank-tender language were used strictly to add adhesive weight. All the water for the boiler was drawn from the tender.


Class B3 (Locobase 21004)

Data from "Ceylon Government Railways Type 4.6.0", Locomotives Constructed by Kitson & Co,. Ltd (Leeds: n.d.).

These were clearly based on the B4 saturated-steam Ten-wheelers (Locobase 16066) delivered two years earlier. Like the B4, these engines increased their adhesion by carrying water in side tanks. Boiler water came solely from the tender.


Class B4 (Locobase 16066)

Data from "Ceylon Government Railways", The Locomotive, Volume 17 (15 April 1911), p. 74. See also See also Eng. Udaya Peeligama, "A Concise History Of Motive Power Development On Sri Lankan Railways", presented on the Institution of Engineers Sri Lanka-New South Wales Chapter website at [link], posted 7 September 2018, last accessed 3 August 2021. The first four locomotives came from Neilson & Sons in 1893, the last five from Kitsons in 1911-1912.

These Ten-wheelers featured an unusual combination of side tanks carrying 900 Imperial gallons (1,080 US gallons; 4,088 litres) and trailing a six-wheel tender with a capacity of 1,800 Imp gal (2,160 US gallons; 8,176 litres). Eng Peeligama explains that the water in the side tanks only provided more adhesive weight. Only the tender fed the boiler.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassB2B3B4
Locobase ID20924 21004 16066
RailroadCeylon Government RailwayCeylon Government RailwayCeylon Government Railway
CountryCeylonCeylonCeylon
Whyte4-6-0TT4-6-0TT4-6-0TT
Number in Class15169
Road Numbers1, 3, 25-29, 39-40, 43-47, 193-1968-11, 22, 169-171, 185-19272-75, 147-149, 158-159
Gauge5'6"5'6"5'6"
Number Built35169
BuilderseveralKitson & Coseveral
Year192019131911
Valve GearWalschaertWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10 / 3.0510 / 3.0510 / 3.05
Engine Wheelbase (ft / m)21 / 6.4021 / 6.4021.54 / 6.57
Ratio of driving wheelbase to overall engine wheelbase 0.48 0.48 0.46
Overall Wheelbase (engine & tender) (ft / m)44.45 / 13.5544.15 / 13.5549.79 / 15.18
Axle Loading (Maximum Weight per Axle) (lbs / kg)29,792 / 13,513 / 13,513
Weight on Drivers (lbs / kg)90,720 / 41,15090,720 / 41,150
Engine Weight (lbs / kg)122,640 / 55,629122,864 / 55,629119,840 / 54,359
Tender Loaded Weight (lbs / kg)72,240 / 32,76872,128 / 32,768
Total Engine and Tender Weight (lbs / kg)194,880 / 88,397194,992 / 88,397
Tender Water Capacity (gals / ML)2880 / 15.253408 / 15.253240 / 12.27
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 5.50 / 5 6.60 / 5 5.50 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)53.50 / 109253.50 / 109253.50 / 1359
Boiler Pressure (psi / kPa)160 / 1100160 / 1100160 / 1100
High Pressure Cylinders (dia x stroke) (in / mm)18.5" x 26" / 470x66018.5" x 26" / 470x66018.5" x 26" / 470x660
Tractive Effort (lbs / kg)22,620 / 10260.2722,620 / 10260.2722,620 / 10260.27
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.01 4.01
Heating Ability
Tubes (number - dia) (in / mm)83 - 2" / 51 / 51165 - 2" / 51
Flues (number - dia) (in / mm)18 - 5.25" / 133 / 133
Flue/Tube length (ft / m)12.90 / 3.9312.90 / 3.9312.92
Firebox Area (sq ft / m2)114 / 10.59114 / 10.59114 / 10.59
Grate Area (sq ft / m2)23.50 / 2.1823.50 / 2.1823.50 / 2.18
Evaporative Heating Surface (sq ft / m2)993 / 92.25993 / 92.251228 / 114.08
Superheating Surface (sq ft / m2)172 / 15.98240 / 15.98
Combined Heating Surface (sq ft / m2)1165 / 108.231233 / 108.231228 / 114.08
Evaporative Heating Surface/Cylinder Volume122.76122.76151.81
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation376037603760
Same as above plus superheater percentage432444743760
Same as above but substitute firebox area for grate area20,97621,70618,240
Power L1548765663171
Power MT

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