Caledonian Railway 191 Class

Caledonian Railway 191 Class

Type and origin Power type Steam Designer William Pickersgill Builder North British Locomotive Company Build date 1922 Total produced 8

Specifications Configuration 4-6-0 Gauge 4 ft 8 1⁄2 in (1,435 mm) Driver diameter 5 ft 6 in (1.68 m) Loco weight 62.75 tons Tender weight 37.85 tons Boiler pressure 185psi Superheater not superheated Cylinders Two, outside Cylinder size 20.5 in × 26 in (521 mm × 660 mm) Valve gear Walschaerts

Performance figures Tractive effort 23,555 lbf (104.78 kN)

Career Operators CR • LMS Class CR: 191 Power class LMS: 3P Preserved None Scrapped 1939-1945 Disposition All scrapped

The Caledonian Railway 191 Class were 4-6-0 passenger engines designed by William Pickersgill and built in 1922 by the North British Locomotive Company. The class was intended for use on the Callander and Oban line, to augment the 55 Class 4-6-0s and replace elderly 179 Class 4-4-0s, and they were thus known as the New Oban Bogies, however, they were also used on other Caledonian lines.

Reputation

The locomotives were not completely successful, having a reputation for being short of steam unless skilfully fired, and the dubious distinction of the highest total locomotive hammerblow of any locomotive class inherited by the LMS upon its formation in 1923. The lack of superheating was a curious omission from a type introduced as late as 1922.

Disposal

All were withdrawn and scrapped between 1939 and 1945, having been displaced by new Black Five 4-6-0s under the LMS's drive for standardisation.

Numbering and Locomotive Histories

CR no.	LMS no.	Delivered	Works	Scrapped
191	14619	12/1922	NBL 22955	11/1940
192	14620	12/1922	NBL 22956	10/1943
193	14621	12/1922	NBL 22957	12/1945
194	14622	12/1922	NBL 22958	11/1943
195	14623	12/1922	NBL 22959	12/1939
196	14624	12/1922	NBL 22960	2/1940
197	14625	12/1922	NBL 22961	2/1939
198	14626	12/1922	NBL 22962	4/1943

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