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Re: [BRHSlist] How do you start a GP-7 locomotive?

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Subject: Re: [BRHSlist] How do you start a GP-7 locomotive?
From: "George William \(Bill\) Newport" <gwnewport2@yahoo.com>
Date: Sun, 26 Oct 2003 08:12:26 -0800 (PST)
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 All the ones that I have run used the most common system of starting,
the main generator has a starter curcuit on the commontater and voltage from 
the batteries is used to motor the diesel engine until it starts,
then when the start button is released,
the generator returns to its generating duties,
I cannot remember what it is,
but the older diesel electrics could be pushed by another locomotive and the 
traction motors used as generators to turn over the main generator and start 
the diesel if the batteries were not good enough to do it
I am not sure what you mean by modern and older,
the AC,
alternating current ones are different from the DC,
direct current,
the basic systems are the same,
the diesel electrics are actually similar to the electrics that get their power 
from an overhead line,
instead of a diesel the accessories like the air compressor are run from an 
electric motor,
your first generation diesel electics are just like later generations in main 
systems,
there have been upgrades in air brakes and other accessories,
the main generator outputs are similar as the traction motors could be 
interchanged if they would mechanically fit
G
  wollffee &lt;wolfee@onebox.com&gt; wrote: Actually, I never saw one turned 
off. But, if it was, how did it 
start? Electric motor? Air compressor? 3 guys with a big rope? 
What? Are modern ones the same as the old ones?

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