Author Topic: East Coast 91's  (Read 1008 times)

Offline X314NNO

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East Coast 91's
« on: November 28, 2012, 08:15:34 PM »
A second pantograph has been fitted to an East Coast Class 91 as part of a joint initiative designed to reduce failures.

A joint scheme involving Eversholt Rail Group, East Coast, ESG, Wabtec Rail and Brecknell- Willis is underway, with 91114 the modified locomotive.

It was due to be completed on November 23, just after RAIL went to press. First reported a year ago (RAIL 680), EC has been looking at ways to improve the reliability of the Class 91s.

Eversholt is set to spend £20 million on the ‘91s’ and £100m on the Mk 4 coaches they haul.

The ‘91’ was expected to re-enter traffic on November 27, with a single pantograph in use. EC spokesman John Gelson told RAIL: “The additional pantograph head could be used following commissioning, out of passenger service testing and technical approval. If successful, this new design will help us deliver greater reliability.”

Along with Eversholt, which owns the 31 Class 91s, EC identified that a twin pantograph would eliminate a single point failure on the locomotives. It is believed that this will reduce the failures and follows a full analysis of the costs of in-service delays attributed to pantograph/OLE system failures. Eversholt says that this provides redundancy in the event of a pantograph/OLE failure.

The plan means that if there is an ADD (Automatic Dropping Device) activation or the pantograph becomes detached, the train can keep going.

Brecknell-Willis developed a high-speed pantograph design for 91114 that uses the same mounting positions as a conventional pantograph but pairs two pantograph arms in an opposing configuration