GNRI Class BT

Specifications
Specifications
Configuration:;
• Whyte	4-4-0T
Gauge	5 ft 3 in (1,600 mm)
Driver dia.	4 ft 7 in (1,397 mm)
Boiler pressure	160 lbf/in2 (1,103.16 kPa)
Cylinders	Two, inside
Cylinder size	15 in × 20 in (380 mm × 510 mm)
Train heating	steam

Type and origin
Type and origin
Power type	Steam
Designer	J.C. Park
Builder	Dundalk works
Build date	1887
Total produced	13

Great Northern Railway
Class BT
Great Northern Railway; Class BT
	BT No. 1 at Irish Street Halt, Armagh, 1909
Power type
Type and origin
Power type	Steam
Designer	J.C. Park
Builder	Dundalk works
Build date	1887
Total produced	13
Configuration:;
Specifications
Configuration:;
• Whyte	4-4-0T
Gauge	5 ft 3 in (1,600 mm)
Driver dia.	4 ft 7 in (1,397 mm)
Boiler pressure	160 lbf/in2 (1,103.16 kPa)
Cylinders	Two, inside
Cylinder size	15 in × 20 in (380 mm × 510 mm)
Train heating	steam
Operators
Career
Operators	GNR(I)
Number in class	13

Great Northern Railway Class BT were a class of 13 4-4-0 T tank locomotives introduced by the GNR(I) from 1887. They were the Great Northern Railways first home built engine and therefore the first engine to be built in Dundalk works.

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particularly with bogie carriages a factor meant by the 1920s they were underpowered for all available work and were withdrawn by 1921.