Subject:
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Re: My Sante Fe 10020
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Newsgroups:
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lugnet.trains
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Date:
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Tue, 26 Feb 2002 17:34:51 GMT
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Viewed:
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1297 times
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In lugnet.trains, Tony Hafner writes:
> In lugnet.trains, Larry Pieniazek writes:
> > In lugnet.trains, William R. Ward writes:
> > > Caltrain is a little weird because the locos always face San Jose,
> > > regardless of the direction of travel.
> >
> > This is almost completely standard commuter train practice, it's called
> > "push pull" operation. SEMTA, SEPTA, MTA, CTA, Metro North, you name it,
> > they all do it.
>
> I've seen the term "push-pull" (in at least one coffee-table type railfan
> book) used to refer to one locomotive at each end of a consist. Is that
> incorrect usage of the term, or does it have two completely different
> meanings?
I am not sure but I would tend to lean toward both correct, different meanings.
Commuter practice puts controls in the ends of "some" (or all) cars so that
when the consist is made up a car with a controlset is at the very end of
the consist, enabling operation in reverse.
Some lines used depowered locomotives as their control vehicles. The book
author may have seen that and thought it was a locomotive at each end. I
dunno. But I do know this, unless you have a way to precisely control both
locos, having actual power at both ends is tricky.
I am not sure how commuter lines do it. They may use electrical signals or
they may run the MU lines all the way down the train.
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Message has 2 Replies:
 | | Re: My Sante Fe 10020
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| (...) This is in the dealings of DP, Depositied power... DP is standard in newer North American loco's computers, uses Radio Frequencies, allows the engineer to precisely control the rear engine, taking off slightly slower then the lead loco, to (...) (23 years ago, 26-Feb-02, to lugnet.trains)
| | | Re: My Sante Fe 10020
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| In lugnet (...) meanings. (...) Yes, push pull generally, as far as I tell, means that the loco(s) are at one end, and there is a control cab at the other end. (...) GO used to do this with F units :). (But, they mostly use the coaches, since the (...) (23 years ago, 27-Feb-02, to lugnet.trains)
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Message is in Reply To:
| | Re: My Sante Fe 10020
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| (...) I've seen the term "push-pull" (in at least one coffee-table type railfan book) used to refer to one locomotive at each end of a consist. Is that incorrect usage of the term, or does it have two completely different meanings? -- Tony Hafner (...) (23 years ago, 26-Feb-02, to lugnet.trains)
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