Belfast & County Down 4-4-2 Locomotives in Ireland


Class Details by Steve Llanso of Sweat House Media

Class 21 (Locobase 10159)

Data from "Ten-Wheeled Compound Tank Engine, Belfast & County Down Railway," The Locomotive Magazine, Vol V (September 1900), p. 145. Boiler pressure is an estimate.

These were used for working the heavy passenger traffic between Belfast and Bangor. Interestingly, 22 was converted to simple expansion within a couple of years of their arrival.


Class 3 (Locobase 10379)

Data from "Recent Belfast & County Down Ry Locomotives," The Locomotive Magazine, Vol IX (26 September 1903), p. 187. Works numbers were 4231-4233.

Described as "extremely fine locomotives," this set of 10-wheel tanks were reported to work both local traffic and main-line trains "very satisfactorily." They had a long wheelbase and large-diameter trailing wheels.

Principal Dimensions by Steve Llanso of Sweat House Media

Class213
Locobase ID10159 10379
RailroadBelfast & County DownBelfast & County Down
CountryIrelandIreland
Whyte4-4-2T4-4-2T
Number in Class23
Road Numbers21-223, 15, 30
Gauge5'3"5'3"
Number Built23
BuilderBeyer, PeacockBeyer, Peacock
Year19001901
Valve GearWalschaertStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.75 / 2.67 8.25 / 2.51
Engine Wheelbase (ft / m)27.25 / 8.31
Ratio of driving wheelbase to overall engine wheelbase 0.30
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)124,320 / 56,391
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)124,320 / 56,391
Tender Water Capacity (gals / ML)1380 / 5.231920 / 7.27
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)60 / 152466 / 1676
Boiler Pressure (psi / kPa)160 / 11160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)18.5" x 24" / 470x610 (1)17" x 24" / 432x610
Low Pressure Cylinders (dia x stroke) (in / mm)26.5" x 24" / 673x610 (1)
Tractive Effort (lbs / kg)12,518 / 5678.0814,292 / 6482.75
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)192 - 1.875" / 48
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)102 / 9.48
Grate Area (sq ft / m2)19 / 1.7717.20 / 1.60
Evaporative Heating Surface (sq ft / m2)1130 / 105.02
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1130 / 105.02
Evaporative Heating Surface/Cylinder Volume179.22
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation30402752
Same as above plus superheater percentage30402752
Same as above but substitute firebox area for grate area16,320
Power L14578
Power MT

All material Copyright © SteamLocomotive.com
Wes Barris