The Caledonian Railway 294 and 711 Classes (nicknamed "Jumbo") were 0-6-0 steam locomotives designed by Dugald Drummond for the Caledonian Railway (CR) and introduced in 1883. After Drummond's retirement, construction of the class continued under Smellie, Lambie and McIntosh.[1][2]

Caledonian Railway 294 and 711 Classes
711 class No. 57472 at Bo'ness 4 October 1961
Type and origin Power type Steam Designer Dugald Drummond Build date 1883-1897 Total produced 244
Specifications Configuration: ​  • Whyte 0-6-0 Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 5 ft 0 in (1.52 m) Loco weight 41.3 long tons (42.0 t) Fuel type coal Boiler pressure 150 psi (1,000 kPa) Cylinders Two, inside Cylinder size 18 in × 26 in (457 mm × 660 mm) Valve gear Stephenson
Performance figures Tractive effort 17,901 lbf (79.63 kN)
Career Operators Caledonian Railway London, Midland and Scottish Railway British Railways Class CR: 294 and 711 Power class LMS: 2F Numbers LMS:17230-17392 (294) 17393-17473 (711) BR:57230-57392 (294) 57393-57473 (711) Nicknames Jumbo Locale Scottish Region Withdrawn 1946-1962 Disposition All scrapped

Ownership changes

All 244 locomotives survived to be absorbed by the London, Midland and Scottish Railway (LMS) in 1923 and 238 survived into British Railways (BR) ownership in 1948.

Numbering

294 Class

711 Class

The BR number series are not continuous because some locomotives were withdrawn before 1948.

See also

• Locomotives of the Caledonian Railway

References

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