Highland Railway O Class

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Highland Railway O class
Type and origin
Power typeSteam
Designer David Jones
Builder HR Lochgorm Works
Build date1878–1879
Total produced3
Specifications
Configuration:
   Whyte 2-4-0T (rebuilt as 4-4-0T)
   UIC 1′B t, rebuilt as 2′B t
Gauge 4 ft 8+12 in (1,435 mm)
Leading dia. New:3 ft 9+12 in (1.156 m)
Rebuilt:2 ft 7+12 in (0.800 m)
Driver dia.4 ft 9 in (1.448 m)
Loco weightNew: 36 long tons 0 cwt (80,600 lb or 36.6 t)
Rebuilt: 44 long tons 0 cwt (98,600 lb or 44.7 t)
Boiler pressure140 lbf/in2 (0.97 MPa)
Heating surface913 sq ft (84.8 m2)
Cylinders Two, outside
Cylinder size 16 in × 22 in (406 mm × 559 mm)
Valve gear Allan
Performance figures
Tractive effort 12,158 lbf (54.08 kN)
Career
Operators Highland Railway
London, Midland & Scottish
Class HR: O
Power classLMS: unclassified
Withdrawn1928–1932
DispositionAll scrapped

The Highland Railway O Class locomotives were built as 2-4-0T tank engines, but were soon rebuilt as 4-4-0Ts. They were designed by David Jones for Scottish Railway companies and three were built at the company's Lochgorm Works in 1878 and 1879.

Contents

Dimensions

They had 4-foot-9-inch (1,448 mm) coupled wheels, 16-by-22-inch (406 by 559 mm) outside cylinders and weight (in original condition) of 36 tons.

Numbering

Table of locomotives
HR No.NameDate builtLMS No.WithdrawnNotes
58 Burghead December 1878150111928Name removed in 1900. Renumbered 58A in 1912 and 58B in 1920
59 Highlander June 1879150101933Name removed in 1900. Renumbered 59A in 1912 and 59B in 1920
17 Breadalbane December 1879150121929Renamed Aberfeldy in 1886; name removed in 1900. Renumbered 50 in 1901, 50A in 1912, 50B in 1920

Rebuilding

They were rebuilt as 4-4-0Ts in 1881–82 due to trouble with the single leading axle.

Transfer to LMS

All three were still in service in 1923, although relegated to shunting duties, and they were transferred to the London, Midland and Scottish Railway (LMS) at the Grouping.

Withdrawal

The three locomotives were withdrawn between 1928 and 1933, None have survived into preservation.

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References