Midland Railway 780 Class

The Midland Railway 780 Class was a class of 0-4-4T steam locomotives. They were built by Dubs & Co. in 1870, and were very similar to the 690 Class. Originally numbers 780–799. They were double-framed engines with a back tank behind the cab under the bunker. They were all originally fitted with condensing apparatus for working the Metropolitan lines.

Midland Railway 780 class
Type and origin Power type Steam Designer Matthew Kirtley Builder Dübs & Co. Serial number 357–376 Build date 1870 Total produced 20
Specifications Configuration: ​  • Whyte 0-4-4WT  • UIC B2′ n2t Gauge 4 ft 8 1⁄2 in (1,435 mm) Driver dia. 5 ft 2 in (1.575 m) Trailing dia. 3 ft 0 in (0.914 m) Wheelbase:  • Engine 8 ft 0 in (2.438 m) + 9 ft 9 in (2.972 m) + 5 ft 0 in (1.524 m) Frame type Double frame Loco weight 43 long tons 13 cwt (44.4 t) Fuel type Coal Boiler: ​  • Diameter 4 ft 3 in (1.295 m)  • Tube plates 11 ft 0 in (3.35 m) Heating surface 1,072.7 sq ft (99.66 m2) Cylinders Two, inside Cylinder size 17 in × 24 in (432 mm × 610 mm)
Career Operators Midland Railway London, Midland and Scottish Railway Numbers New: 780–799 1907: 1206–1225 Withdrawn 1921–1935

In 1898 Nos 780–783 were transferred to the duplicate list as Nos 780A–783A. Their 1907 numbers were 1206–1225. No. 1212 was withdrawn in 1921, but the remaining 19 were inherited by the London, Midland and Scottish Railway at the 1923 Grouping. They were all withdrawn, and were extinct by 1935.