Thread: First Great Western Equipment Question
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Old July 10th 11, 06:20 PM posted to uk.transport,uk.transport.london
Robert Neville Robert Neville is offline
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First recorded activity at LondonBanter: Apr 2008
Posts: 65
Default First Great Western Equipment Question
furnessvale wrote:

Smaller multiple units are a form of diesel hydraulic. A fluid
flywheel engages when the throttle is opened. This effectively
provides a clutch up to around 45mph when you will hear a step change
in the revs as direct drive is engaged.

Thank you - a curiosity answered!
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