NMT- New Measurement Train
The Network Rail New Measurement Train (NMT) was launched in 2003 and assesses the condition of track so that engineers can determine where work is required. It was assembled from High Speed Train Class 43 power cars and Mark 3 coaches and can check the condition of all main lines in Great Britain in a fortnight.
Due to its all-over yellow livery, it has been nicknamed "Top Banana". It has three power cars available for use, nos 43013, 43014 and 43062, the first two being ex-DVT's from the original IC225 Mk3 coach testing phase and these are fitted with buffing gear and couplers. Although they were originally equipped with the Paxman Valenta engines they have all now been re-engined with MTU power units.
One of the jobs we were called upon to undertake was some brake testing on the New Measurement Train not long after it was first assembled.
This HST set was originally made up of Mk3 and Mk2 coaches and was expected to run at up to 125 mile/h. As the Mk2 coaches with B4 bogies weren't designed for this speed, their braking needed adjustment and the Testing Section were called in to assess the NMT's braking performance.
Unfortunately it was not adequate for high speed, despite a number of attempts to improve it, and therefore the NMT was limited to 110 mile/h for the first years of its life.
Following the introduction of further Mk3 coaches the restriction was lifted.
The set is owned by Network Rail but operated by DB Schenker
Click on the picture for a bigger image - photos are the author's unless otherwise indicated
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