----- Original Message -----
From: Bruce Backus <[EMAIL PROTECTED]>
To: Illina Maillist (E-mail) <[EMAIL PROTECTED]>
Sent: Tuesday, November 23, 1999 15:10
Subject: RE: [IllianaRR] Re: real CN power
>
> <<snip-snip>>
> > Now say you are on those MACs with the computer screens and desktop
> > controls. When you hit the same incline, would the computer
> > adjust the
> > engine speed so you maintain 40mph without moving the
> > throttle? I guess
> > what I am getting at is; with the computerize cabs, are the trottle
> > positions matched to a certain mph and then the computer will adjust
> > engine speed to maintain the throttle position?
> >
>
> Most of the "computerize" locomotives are equipped with speed control,
which
> will do exactly what you mention above. However, I am not aware of any
> railroads which allow its usage "at speed". It is used all the time during
> loading and unloading operations (such as coal) at .2 - 4 MPH.
The only speed control I have ever encountered is what Bruce mentioned, and
even that is only used for very low speed operation like loading coal or for
humping operations. As for the "cruise control" aspect, I am not aware of
such an item.
The computers on the modern locomotives will automatically adjust engine
rpms to correspond with optimum efficiency in the operation of the prime
mover itself, not for train speed. On non microprocessor equipped
locomotives, each throttle position is set to a specific predetermined
engine speed (rpm's). In both cases though, with the exception of the low
speed pace setter, the speed of the locomotive is controlled manually.
Tuch
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