Peckett OQ Class

The Peckett OQ Class is a class of 0-6-0ST steam locomotives built in Bristol, England by Peckett & Sons. Three were built; no. 2124 for Tower Colliery in 1951 and nos. 2150 and 2151 for Mardy Colliery in 1954. No. 2150 has been preserved and is named Mardy Monster. According to Heritage Railway magazine it is "Britain’s most powerful industrial locomotive". This claim may be misleading because it is based on tractive effort rather than horsepower.[1][2][3]

Peckett OQ Class
Peckett OQ Class 0-6-0ST No. 2150 Mardy Monster at the Elsecar Heritage Railway
Type and origin
Power typeSteam
BuilderPeckett & Sons
Serial number2124, 2150–2151
ModelOQ
Build date1951–1954
Total produced3
Specifications
Configuration:
  Whyte0-6-0ST
Gauge4 ft 8+12 in (1,435 mm)
Driver dia.4 ft 0+12 in (1.232 m)
Loco weight55 tons
Fuel typeCoal
Firebox:
  Firegrate area
19.1 sq ft (1.77 m2)
Boiler pressure200 psi (1.38 MPa)
Heating surface921 sq ft (85.6 m2)
CylindersTwo, outside
Cylinder size18 in × 26 in (457 mm × 660 mm)
Performance figures
Tractive effort29,527 lbf (131.34 kN)
Career
Operators
Disposition2 scrapped, 1 preserved

Preservation

After being withdrawn in 1976, No. 2150 was preserved by the Swanage Railway in 1979. In 1997 it was purchased by the Elsecar Heritage Railway, returning to service in June 2003. It was withdrawn after its boiler certificate expired in 2013.[4] Its overhaul was never completed and it was sold in 2020.[5]

References

  1. "The Monster returns". Heritage Railway. Archived from the original on 4 March 2016. Retrieved 17 February 2016.
  2. "Peckett". Industrial Railway Society. Retrieved 23 December 2010.
  3. "Peckett Loco's". Martyn Bane. Retrieved 23 December 2010.
  4. Mardy Monster Elsecar Heritage Railway
  5. Yorkshire Live, 8 July 2020

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