GNRI Class PG

Great Northern Railway Classes PG, QG, QLG and QNG
Type and origin Power type Steam Designer C. Clifford Serial number 10,11,100−103,151 (PG) 152-155 (QG) 119, 158-165 (QLG) 38, 39, 112 (GNQ) Build date 1899—1911 Total produced 28
Specifications Configuration: ​  •  Whyte 0-6-0 Gauge 5 ft 3 in (1,600 mm) Driver dia. 4 ft 7+1⁄4 in (1,403 mm) Loco weight 39 long tons 14 cwt (88,900 lb or 40.3 t)—49 long tons 0 cwt (109,800 lb or 49.8 t) Boiler pressure 175 lbf/in2 (1,206.58 kPa) Cylinders Two, inside Train heating steam
Performance figures Tractive effort 19,880 lbf (88.43 kN)−24,065 lbf (107.05 kN)
Career Operators GNR(I) → UTA → CIÉ Number in class 28
[1]

Great Northern Railway Classes PG, QG, QLG and QNG ^[a] were a series of 0-6-0 freight locomotives introduced from 1899 by Charles Clifford. ^[1]

History

The PG class was introduced in December 1899 by Charles Clifford with 4 feet 7 inches (1.40 m) driving wheels and 18+1⁄2 by 24 inches (47 cm × 61 cm) cylinders. ^[2] The QG's introduced in 1904 were 1 foot 6 inches (0.46 m) longer than the PG with 18+1⁄2 by 26 inches (47 cm × 66 cm) cylinders weighed in 2 tons heavier. ^[3] The key changed with the QLG class introduced in 1906 was a 4 feet 9 inches (1.45 m) wide boiler. ^[4]

Notes

1. There are variations in the class designations, sometimes LQG is used for QLG for example

References

1. Boocock (2009), pp. 73−75.
2. Johnston (1999), pp. 81–82.
3. Johnston (1999), p. 83.
4. Johnston (1999), pp. 83–84.

• Boocock, Colin (1 October 2009). "Locomotive Compendium Ireland" (1st ed.). Ian Allan. ISBN   9780711033603.
• Johnston, Norman (1999). Locomotives of the GNRI. Newtownards: Colourprint Books. ISBN   1-898392-48-X. OCLC   43340833. OL   12248170M.