The M1 locomotive was a class of

locomotive A locomotive or engine is a rail transport vehicle that provides the Power (physics), motive power for a train. If a locomotive is capable of carrying a payload, it is usually rather referred to as a multiple unit, Motor coach (rail), motor ...

s, used by

Sri Lanka Railways The Sri Lanka Railway Department (more commonly known as Sri Lanka Railways (SLR)) ( Sinhala: ශ්‍රී ලංකා දුම්රිය සේවය ''Śrī Laṃkā Dumriya Sēvaya''; Tamil: இலங்கை புகையிரத ...

, imported from 1953, and manufactured by Brush Bagnall Traction. The locomotives weighed had a V12

Mirlees MAN Diesel SE was a German manufacturer of large-bore diesel engines for marine propulsion systems and power plant applications. In 2010 it was merged with MAN Turbo to form MAN Diesel & Turbo. History * In 1980, MAN acquired the Burmeister & Wa ...

JS12VT four-stroke engine. The Sri Lanka railway had a fleet of 25 of these Class M1 locomotives which began introduction in 1953 and were removed from service from 1983. Locomotive number 560 is the subject of a restoration attempt. Class M-1 Locomotive at Sri Lanka railway museum Kadugannawa 20150621 164402

Class M-1 Locomotive at Sri Lanka railway museum Kadugannawa 20150621 164402

Introduction

In the 1950s Sri Lankan Railways was seeking replacements for old rolling stock, routine replacement of which had been delayed by

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

. Specifications were for 25 locomotives with power at the wheel, available from upwards, and up to an altitude of . The train was expected to be used for suburban trains centered on

Colombo Colombo ( ; si, කොළඹ, translit=Koḷam̆ba, ; ta, கொழும்பு, translit=Koḻumpu, ) is the executive and judicial capital and largest city of Sri Lanka by population. According to the Brookings Institution, Colombo me ...

, as well as mail trains in the north of the country, and trains in hill areas: approximately requirements were for a vehicle capable of pulling at on a

gradient In vector calculus, the gradient of a scalar-valued differentiable function of several variables is the vector field (or vector-valued function) \nabla f whose value at a point p is the "direction and rate of fastest increase". If the gradi ...

of 1 in 44 (2.27%) on track with reverse curves; preferably within an locomotive weight on 6 axles (A1A-A1A). Several firms tendered for the contact; American suppliers were unable to enter a competitive bid due to the devaluation of both the rupee and British pound. Brush offered a locomotive with power, and a generator output of , capable of multiple working, and was awarded the contract. Five locomotives were supplied (deliveries beginning Jan. 1953) for operational testing – Brush had not been able to fully stress test the units in England due to an absence of a full scale test track. National railway museum, Kadugannawa

During testing engine overheating was found to be a serious problem on the steeply graded and curving mainline. Other issues requiring attention included fuel pump problems including air-locks, and bogie frame cracking. The electrical circuit for

torque In physics and mechanics, torque is the rotational equivalent of linear force. It is also referred to as the moment of force (also abbreviated to moment). It represents the capability of a force to produce change in the rotational motion of th ...

control was also modified. The remaining twenty locomotives, with modifications required to resolve the issues found during testing were delivered from May 1954, at a rate of approximately 1 per month.

References

Sources

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External links

* {{DEFAULTSORT:Sri Lanka Railways M01 Railway locomotives introduced in 1953 M01 Brush Traction locomotives A1A-A1A locomotives 5 ft 6 in gauge locomotives

Introduction

See also

References

Sources

External links