- 6 Jan 2010
Thanks - always wondered how it was done.A single train crew is responsible for the entire lash-up of locos, they are connected together via a special hook-up called an MU - see here - http://www.ogaugerr.com/images/RPM/221_MU_Setup.pdf
The computer systems keep the locomotives matched with regard to engine speed and output. You know that they are called diesel engines, but are, in fact, diesel-electric engines. The prime movers only act as generators for the DC [older] or AC [newer[ locomotives. The 'notches' you may have heard of are pre-set levels of engine revolutions and the corresponding output from the generators drives the traction motor on each axle.