Re: diesel loco

["Rich" <torich@netzero.net>]

Tis like Tug Boats they need that great power of direct electrical drive. No
gears..

----- Original Message -----
From: "VanDerWal, Peter" <vanderwp@fhu.disa.mil>
To: <ev@listproc.sjsu.edu>
Sent: Friday, June 29, 2001 2:29 PM
Subject: Re: diesel loco


> >But, the losses in the various stages of energy conversion
> >would make direct drive from the engine a more feasible
> >option, at least for the initial push. Why waste so much energy?
>
> Because you have to get the train moving.  It's not practical to slip a
> clutch to get a million tons of train moving.
>
> When motors and generators get to this size they are typically in the high
> 90s for efficiency.  The total efficiency (generator to motor) is probably
> at or above 90%.
>
>
> Pete.
> Life is hard. But it's harder if you don't know how the world works!
>
>
>
>


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