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SR USA class

Southern Railway USA class
USA class locomotive No. 30073 at Eastleigh MPD in August 1966.
Type and origin
Power typeSteam
DesignerCol. Howard G. Hill.
Builder
ModelS100
Build date1942-43
Specifications
Configuration:
 • Whyte0-6-0T
 • UICC n2t
Gauge4 ft 8+12 in (1,435 mm) standard gauge
Driver dia.55.2 in (1.402 m)
Wheelbase10 ft 0 in (3.05 m)
Length29 ft 8 in (9.04 m)
Loco weight46 long tons 10 cwt (47.2 t; 52.1 short tons)
Fuel typeCoal
Fuel capacity17.8 short hundredweight (0.81 t; 0.79 long tons)
Water cap.1,000 imp gal (4,500 L; 1,200 US gal)
Boiler pressure210 psi (1.45 MPa)
CylindersTwo, outside
Cylinder size16+12 in × 24 in (419 mm × 610 mm)
Valve gearWalschaerts
Valve type8 in (203 mm) piston valves
Performance figures
Tractive effort21,630 lbf (96.22 kN)
Career
Operators
ClassSR: USA
Power classBR: 3F
Number in class14 (plus one bought for spares)
NicknamesYank Tanks
LocaleSouthampton Docks
Withdrawn1962–1967
Preserved30064, 30065, 30070, 30072, others of base S100 class
DispositionFour preserved, remainder scrapped
Sources: [1][page needed] and [2]

The SR USA class are some ex-United States Army Transportation Corps S100 Class steam locomotives purchased and adapted by the Southern Railway (SR) after the end of the Second World War to replace the LSWR B4 class then working in Southampton Docks. SR staff nicknamed them "Yank Tanks".[3][4]

  1. ^ Longworth 2005.
  2. ^ Bradley 1975, p. 66.
  3. ^ "USA 0-6-0T". Southern Railway E-Group. Retrieved 3 November 2018.
  4. ^ "Yank Tanks in Southampton". 25 May 2018. Retrieved 10 August 2022 – via PressReader.