User:Yugystudios/Sandbox4
This page is a sandbox for the BESA design M class locomotives. WIP
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The Indian locomotive class M (Mixed) was a class of 4-6-0 mixed traffic metre gauge locomotives introduced in 1903,[a] used on the railways of British India. It was one of the BESA locomotives developed by the British Engineering Standards Committee (BESC), later the British Engineering Standards Association (BESA).
Background
[edit]British Indian railways operated numerous steam locomotives built to their own design standards, and at the turn of the century, this created a considerable strain on British locomotive manufacturers who could not keep up with demand. This led to British Indian railways outsourcing production of locomotives to non-British companies, which generated complaints from British locomotive manufacturers,[2] so the BESC was requested by the British Indian government to assemble a locomotive committee[3] which included British locomotive manufacturers to develop standard locomotive classes for British Indian railways in order to ease the strain placed on British locomotive manufacturers.[4] Its first report, compiled in 1903,[1][a] outlined plans for British Indian standard locomotives, being revised in 1907[5] and in 1910.[6]
History
[edit]![[icon]](/wiki/File:Wiki_letter_w_cropped.svg){kind=small} | This section needs expansion with: allocations of locomotives, classifications, if any design changes were added, builders. You can help by adding to it. (September 2024) |
The M class locomotives were first catalogued in the first report of the BESC on British Indian standard locomotive classes (1903).[1][a] They then found their way into British Indian (later Indian, Pakistani, and Bangladeshi), Burmese, Cambodian and the Thai railways who then operated locomotives built to this design.
Design
[edit] | This section needs expansion with: superheated variants and design specifications. You can help by adding to it. (September 2024) |
The locomotives were designed to use the same boilers as the class G (Goods) 4-8-0 and the P (Passenger) 4-6-0 locomotives, also of the metre gauge.[1] They were designed with two outside cylinders, a Belpaire firebox[1] and used saturated steam.[7] Superheated versions were classified as MS[7] (S means superheated). The valve gear used was the Walschaerts valve gear (some Thai locomotives were converted to Caprotti[citation needed]) with slide valves;[1] superheated variants were equipped with piston valves.[citation needed] The reversing gear was located on the right-hand side of the cab, actuated by a screw reverser.[1] The wheelbase between the two rear driving wheels are longer than those of the two front driving wheels to accommodate the firebox and grate.[b] The size of the drivers did not neccessitate the need to fit splashers above the wheels on the running board,[c] The tender had a fuel capacity of 4 tons, a water capacity of 4000 gallons, and a half-cab.
In other countries
[edit]Burma (Myanmar)
[edit]Several locomotives of this BESA design were delivered to Burma Railways and were classified as class K. Superheated versions were classified as Ks (superheated)[8] and had piston instead of slide valves.
Thailand
[edit]The Royal State Railways of Siam (RSR(S)) had several locomotives of this BESA design and were classified as the class E.[9] Some were later donated to Cambodia in the 1970s.[10]
Cambodia
[edit]As stated earlier, some Thai E class locomotives were donated by the State Railways of Thailand (SRT) to Cambodia in the 1970s.[11] They were classified under the 230-0xx number series, upon withdrawal of the Indonesian C52s that were brought over from Java to Cambodia during the Japanese occupation which were numbered in the same number series.[12]
Notes
[edit]- ^ a b c The report was compiled in 1903, but was not published untill 1905.
- ^ The wheelbase between the first and second drivers measured 5' 4 1/2", and between the second and third drivers it measured 6' 7 1/2".
- ^ The driving wheel diameter measured 4'. This also was the case with the G class 4-8-0 locomotives with a driving wheel diameter of 3' 7". The 4-6-0 P class had a wheel diameter of 4' 9", therefore neccessitating the addition of splashers on the running board to make space for and cover the wheels.
References
[edit]- ^ a b c d e f g Report of the Locomotive Committee on Standard Locomotives for Indian Railways (Report). British Standards Institution. November 1903. Retrieved 8 September 2024.
- ^ Bhandari, R. R. "Steam in History". IRFCA website. Indian Railways Fan Club (IRFCA). Retrieved 8 September 2024.
[The inability of British locomotive manufacturers to meet demand] resulted in orders being placed on German and American manufacturers and ... protest was made on behalf of the [British locomotive manufacturers] in the British Parliament.
- ^ Report of the Locomotive Committee on Standard Locomotives for Indian Railways (Report). British Standards Institution. November 1903. p. 2. Retrieved 8 September 2024.
... with ... instructions received ... from the Secretary of State for India ...
- ^ Bhandari, R. R. "Steam in History". IRFCA website. Indian Railways Fan Club (IRFCA). Retrieved 8 September 2024.
- ^ Second Report of the Locomotive Committee on Standard Locomotives for Indian Railways (Report). British Standards Institution. February 1907. Retrieved 10 September 2024.
- ^ "[Third Report of the Locomotive Committee on Standard Locomotives for Indian Railways]". Indian Industries and Power. Vol. 7. 1909. p. 275. Retrieved 10 September 2024.
- ^ a b Smith, Jonathan. "BESA steam locomotives". Standard steam locomotives, The Terminal. Iowa State University. Retrieved 8 September 2024.
- ^ Smith, Jonathan. "Burma Railway steam locomotives". Standard steam locomotives, The Terminal. Iowa State University. Retrieved 8 September 2024.
- ^ Smith, Jonathan. "[Rot Fai Thai (SRT)] (metre-gauge) steam locomotives". Standard steam locomotives, The Terminal. Iowa State University. Retrieved 8 September 2024.
- ^ Roberts, Basil. "Thai E class before donation to Cambodia". Tiger Steam photo gallery, Thailand. International Steam Pages. Retrieved 8 September 2024.
- ^ Roberts, Basil. "Ex-Thai E class locomotive in Cambodian service". Tiger Steam photo gallery, Cambodia. International Steam Pages. Retrieved 8 September 2024.
- ^ Martindale, Colin. "Derelict ex-Thai E class locomotive in Cambodia". Tiger Steam photo gallery, Cambodia. International Steam Pages. Retrieved 8 September 2024.