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The London and North Eastern Railway Class K5 consisted of a single rebuild of LNER Class K3 2-6-0 No. 206 (later No. 61863), rebuilt in 1945 by Edward Thompson. The rebuilt locomotive had a new boiler and two, instead of three, cylinders following earlier rebuilds of other Gresley designs. The clear aim of the rebuilds was to move away from the well established three cylinder policy achieving similar results through higher boiler pressure and two larger cylinders. Easier maintenance and greater availability was the objective.

This article relies largely or entirely on a single source. (December 2016)

LNER Class K5
Type and origin Power type Steam Designer Edward Thompson Build date (rebuilt) 1945
Specifications Configuration: ​  • Whyte 2-6-0 Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 5 ft 8 in (1.73 m) Loco weight 71.25 long tons (72.39 t) Fuel type coal Boiler pressure 225 psi (1.55 MPa) Cylinders two outside Cylinder size 20 in × 26 in (510 mm × 660 mm)
Performance figures Tractive effort 29,250 lbf (130.1 kN)
Career Power class BR: 6MT

Sources

• Ian Allan ABC of British Railways Locomotives, part 4 (1948 ed.). p. 17.^{[full citation needed]}

External links

• The Gresley K3 and Thompson K5 2-6-0 Moguls LNER Encyclopedia

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