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I’m surprised the thread has made it this far without anybody pointing out that the BREL/ABB built 465s retain their original ”Brush” AC traction motors. It’s the traction inverter electronics that were changed to Hitachi equipment - this is what generates the noise.
Is it known yet [to relevant stakeholders outside of Alstom] what level of retraining the ’Atlas’ ETCS cab desk will require, when compared to the extant non-ETCS 387s and 379s?