GNRI Class BT

Great Northern Railway Class BT were a class of 13 4-4-0T tank locomotives introduced by the GNR(I) from 1885.[1]

Great Northern Railway
Class BT
BT No. 1 at Irish Street Halt, Armagh, 1909
Type and origin
Power typeSteam
DesignerJ.C. Park
Build date1885
Total produced13
Specifications
Configuration:
​
 • Whyte4-4-0T
Gauge5 ft 3 in (1,600 mm)
Driver dia.4 ft 7 in (1,397 mm)
Boiler pressure160 lbf/in2 (1,103.16 kPa)
CylindersTwo, inside
Cylinder size15 in × 20 in (380 mm × 510 mm)
Train heatingsteam
Career
OperatorsGNR(I)
Number in class13

While fit for purpose when built, increasing train weights particularly with bogie carriages a factor meant by the 1920s they were underpowered for all available work and were withdrawn by 1921.[2]

References
  1. Rowledge (1993), p. 28.
  2. Johnston (1999), p. 65–66.
  • Johnston, Norman (1999). Locomotives of the GNRI. Newtownards: Colourprint Books. ISBN 1-898392-48-X. OCLC 43340833.
  • Rowledge, Peter (1993). Irish Steam Loco Register. Stockport, England: Irish Traction Group. ISBN 9780947773335. OCLC 30815253.
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