S&DJR Sentinels

The Somerset and Dorset Joint Railway (S&DJR) Sentinel locomotives were two small vertical-boilered, chain-driven steam locomotives for shunting. They were built by Sentinel Waggon Works, who also produced similar designs for industrial customers.

S&DJR Sentinels
Type and origin
Power typeSteam (geared)
BuilderSentinel Waggon Works
Serial number7587–7588
Model200 hp industrial
Build date1929
Specifications
Configuration:
​
 • Whyte0-4-0 vbt
 • UICB n4t
Gauge4 ft 8 1⁄2 in (1,435 mm) standard gauge
Loco weight27 long tons 15 cwt (62,200 lb or 28.2 t)
Fuel typeCoal
Boiler pressure275 lb/in2 (1.90 MPa)
CylindersFour
Cylinder size6 3⁄4 in × 9 in (171 mm × 229 mm)
Valve typePoppet valves
Performance figures
Power output200 hp (150 kW)
Tractive effort15,500 lbf (68.9 kN)
Career
Operators
Number in class2
Numbers
  • S&DJR: 101–102
  • LMS: 7190–7191
  • BR 47190–47191
Withdrawn1961, 1959
DispositionBoth scrapped

Service

The two locomotives were both built in 1929 and given the S&DJR numbers 101 and 102. The locomotives replaced three older Highbridge-built saddle tanks, 24A, 25A and 45A. They were both used for shunting coal wagons on the colliery branchlines around Radstock. They were built to a reduced loading gauge as they had to pass under the Tyning Arch which had only 10 feet 10 inches (3.30 m) clearance.

They were taken into London, Midland and Scottish Railway (LMS) stock in 1930 and renumbered 7190–7191. After nationalisation in 1948, they became 47190–47191 under British Railways. 47191 was withdrawn in 1959 from Bath Green Park and 47190 in 1961 from Bristol (Barrow Road). Both were scrapped.

Preservation
Sentinel Loco 7109 being restored at Midsomer Norton in November 2013

Neither of the Radstock Sentinels survived into preservation. However, a similar locomotive, former Croydon Gasworks No. 37 Joyce, originally built in 1927 (works No. 7109), is under restoration at the Somerset & Dorset Railway Heritage Trust at Midsomer Norton railway station.[1]

References
  1. Andy Chapman. "Sentinel Steam Loco 7109: 7109 Restoration". Sentinel7109.blogspot.com. Retrieved 6 August 2012.
  • Anon. (1959). ABC of British Railway locomotives (combined volume). Ian Allan Limited. p. 95.
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