Plasma Torch evaluation trials
A study was undertaken by BR in the late 60s and early 70s of the operation and evaluation of the use of an arc plasma generator as a means of improving wheel-rail adhesion

Two trains were initially earmarked for this work:-

The first train equipped with the technology was a twin power car Class 101 DMU No RDB975018 and RDB975019. One engine was used for traction and one to power the torches. Argon was carried in a large vacuum container filling the space from floor to ceiling and replenished by a road tanker, hydrogen in a rack of cylinders. Two substantial racks of electrical equipment provided the necessary constant-current electrical supply to the torches. Finally a water circuit with pump and radiator was required to cool each torch. The unit was intended principally for the coal contaminated lines on the MGR network of south Yorkshire hence was based at Tinsley depot and operated from there by R&DD staff on behalf of the Eastern Region

 

DB975018 & DB975019 passing Dunford East (near Barnsley) with the Plasma Torch Train on 29th June 1971. Under the rear bogie of the leading coach a flame can be seen burning onto the railhead to clean it and improve traction

Keith Long
 

The second train was built by the Southern Region and consisted of two EMU power cars. The unit was operated by SR staff and used mainly of leaf-affected track from 1971

Later a new train was put together by the Tribology Section and part of the work was carried out at the Mickleover Test track before is was cut back and BTF made a short film of the train in action

The new plasma torch test train consisted of the following

  • The Metrovick co bo locomotive D5705

  • An adapted and instrumented four wheeled van

  • The plasma coach and match wagon

  • The plasma coach with the plasma torches mounted at the trailing end

The locomotive served the dual purpose of hauling the plasma equipment and making adhesion measurements

The train commenced operation in the summer of 1972 and proved to be an important asset for the adhesion work

Stills from the BTF film of 1970

The train approaching Mickleover tunnel Close up of the torches

Entering the east portal of Mickleover tunnel showing the two vans Entering the tunnel showing the two vans and the propelling Metrovick co-bo D5705

 

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