WAGR M class

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WAGR M/Ms class
M388, East Perth, 1926.jpg
M388 at East Perth Locomotive Depot, 1926
Type and origin
Power typeSteam
Designer Beyer, Peacock & Co
BuilderBeyer, Peacock & Co
Serial number5477-5482, 5665-5671
Build date1911, 1913
Total produced13
Specifications
Configuration:
​
 •  Whyte 2-6-0+0-6-2 (Garratt)
 •  UIC
  • M: (1′C)(C1′) n4t
  • Ms: (1′C)(C1′) h4t
Gauge 3 ft 6 in (1,067 mm)
Loco weightM: 68  long tons  16 cwt (154,100 lb or 69.9 t)
Ms: 69  long tons  16 cwt (156,400 lb or 70.9 t)
Fuel typeCoal
Fuel capacity4 long tons (4.1 t)
Water cap.2,000 imp gal (9,100 L; 2,400 US gal)
Firebox:
 • Firegrate area		22.6 sq ft (2.10 m2)
Boiler pressure
  • M: 175 psi (1.21 MPa)
  • Ms: 160 psi (1.10 MPa)
Heating surface
  • M: 1,340 sq ft (124 m2)
  • Ms: 1,067 sq ft (99.1 m2)
 • Tubes
  • M: 1,233 sq ft (114.5 m2)
  • Ms: 960 sq ft (89 m2)
 • Firebox107 sq ft (9.9 m2)
Superheater:
​
 • Type
 • Heating area
  • M: N/A
  • Ms: 199 sq ft (18.5 m2)
Cylinders 4 (Garratt)
Cylinder size
  • M: 12.5 in × 20 in (318 mm × 508 mm)
  • Ms: 13.25 in × 20 in (337 mm × 508 mm)
Performance figures
Tractive effort
  • M: 22,436 lbf (99.80 kN)
  • Ms: 24,488 lbf (108.93 kN)
Factor of adh.
  • M: 5.3
  • Ms: 5
Career
Operators Western Australian Government Railways
Numbers
  • M388–M393
  • Ms424–Ms430
Dispositionall scrapped

The WAGR M class was a class of 2-6-0+0-6-2 Garratt-type articulated steam locomotives operated by the Western Australian Government Railways (WAGR) between 1912 and 1955. A total of 13 were built by Beyer, Peacock & Co, Manchester in two batches. [1]

Contents

History

The first batch of six engines was constructed in 1911. These engines, entered into service with WAGR in 1912, were only the third Garratt design to be produced and represented a significant step in the development of the type. The second batch, which consisted of seven units, was built in 1913/14 and designated as the Ms class due to the use of superheated steam. One of the engines from the first batch was retrofitted with a superheater and given a Ms classification. [2] [3]

All of the M/Ms class locomotives were utilized to haul trains on the WAGR's light lines. They were withdrawn from service between 1947 and 1955, and all were scrapped. [1]

Class lists

M class list

The numbers and periods in service of each member of the M class were as follows: [1]

M class, built by Beyer, Peacock & Co. in 1911:
Builder's
number		Fleet
number		In serviceWithdrawnNotes
54773882 March 19124 September 1947
54783899 March 191219 December 1934Converted to Ms class
547939016 March 191217 April 1950
548039123 March 191217 April 1947
548139230 March 19124 September 1947
54823936 April 191220 November 1951

Ms class list

The numbers and periods in service of each member of the Ms class were: [1]

Ms class, built by Beyer, Peacock & Co.:
Builder's
number		Fleet
number		Year builtIn serviceWithdrawnNotes
5478389191112 April 193528 September 1950Converted from M class
5665424191327 September 19134 September 1947Stowed 25 July 1945
566642519134 October 19134 September 1947
5667426191327 September 19134 September 1947
566842719134 October 19134 September 1947
566942819134 October 191314 February 1952
5670429191311 October 191313 January 1955
5671430191311 June 191429 May 1953Erected at Midland Railway Workshops, October 1913, for State Saw Mills. In service at Manjimup, November 1913. Transferred to WAGR June 1914 in exchange for G57 & G59.

Namesakes

The M class designation was previously used for the M class locomotives that were withdrawn in 1911. It was reused in the 1970s when the M class diesel locomotives entered service.

See also

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References

Notes

  1. 1 2 3 4 Gunzburg 1984, p. 92.
  2. ↑ Gunzburg 1984, pp. 90–92.
  3. ↑ Turner, Jim (1997). Australian Steam Locomotives 1896-1958. Kenthurst: Kangaroo Press. pp. 54, 63. ISBN   086417778X.

Bibliography

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