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Great Northern Railway Classes P & PP
Type and origin Power type Steam Designer {J.C. Park C. Clifford Build date 1892(P) 1896(PP) Total produced 29
Specifications Configuration: ​  • Whyte 4-4-0 Gauge 5 ft 3 in (1,600 mm) Driver dia. 6 ft 7 in (2,007 mm) 5 ft 7 in (1,702 mm) Boiler pressure 175 lbf/in (1,206.58 kPa) Cylinders Two, inside Cylinder size 17 in × 24 in (430 mm × 610 mm){P) 18 in × 24 in (460 mm × 610 mm)(PP) Train heating steam
Performance figures Tractive effort 13,840 lbf (61.56 kN)−15,340 lbf (68.24 kN)
Career Operators GNR(I) → UTA → CIÉ Number in class 29 Numbers 12, 25, 42–46, 50, 70–71, 74–77, 106–107, 129

Great Northern Railway Class P were two sets of 4-4-0 locomotives for the Great Northern Railway of Ireland (GNRI) introduced from 1892 by locomotive superintendent J.C. Park; four having 6 ft 7 in (2.01 m) driving wheels and eight having 5 ft 7 in (1.70 m) driving wheels. Park was succeeded by Charles Clifford who constructed 17 broadly similar locomotives from 1896 with 6 ft 7 in (2.01 m) driving wheels; these were designated Class PP. The last PP class survived until 1963.

Notes

1. Four Class P with 6' 7" wheels, and eight with 5' 7" wheels; Seventeen Class PP with 6' 7" wheels

References

1. Boocock (2009), p. 65.
2. Johnston (1999), pp. 70–71, 76–77.
3. Johnston (1999), p. 77.

• 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.

• 4-4-0 locomotives
• Railway locomotives introduced in 1892
• 5 ft 3 in gauge locomotives
• Steam locomotives of Northern Ireland
• Steam locomotives of Ireland
• Great Northern Railway (Ireland) locomotives
• Scrapped locomotives