Subject:
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Re: Slug Photos
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Newsgroups:
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lugnet.trains
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Date:
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Wed, 27 Apr 2005 09:44:24 GMT
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Viewed:
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1245 times
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In lugnet.trains, Tim David wrote:
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In lugnet.trains, Mathew Clayson wrote:
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Correct me if I’m wrong but its my understanding that a slug does not
generate power on its own. It is powered from the lead loco. The effect
is greater traction and power but less generation. They are seen a lot in
switching yards but not as much on long hauls.
Mike
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That’s correct. A slug is an engine that’s had the cab and motors removed,
and often the fuel tanks as well. Sometines tha tank is retained and filled
with ballist. This was common with older engines such as a GP9 or GP15.
Either way, extra wieght is added to offset the missing structure and
engines. The (electric)motorized trucks are retained, and are slaved off of
another engine, that it’s permanently or simi permanantly coupled to. The
whole idea is to double the traction for slow heavy loads.
These are used in larger yards, often to pull loads over a hump.
http://espee.railfan.net/sp4xslug.html
A similar configuration is a “cow and calf”. In this case bothe engines
retain thier deisel motors and control systems, however one of the engines
is cabless. http://espee.railfan.net/sptr06.html
Mat
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That interesting, I’d assumed looking at the picture that it was a cow and
calf but I did wonder why the bonnet was so low. I have heard both terms
before but not made the destinction between them I’ve not come across
anything like this elsewhere in the world, the nearest is a steam loco, I
can’t remember what or where with a set of cylinders etc under the tender to
provide more traction, but powered from the loco boiler.
Tim
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In the UK, we used to have the class 13 which was a ‘cow and calf’ type
arrangement built from 2 class 08 shunters, one with cab removed. IIRC this was
in service until the mid 80s exclusively for shunting at Tinsley yard
We also have Diesel Brake Tenders but I’ve not seen one for many years. They
provided ancilliary power but no traction and were based on a shortish bogie
chassis with a low roof.
Jon.
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Message is in Reply To:
 | | Re: Slug Photos
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| (...) That interesting, I'd assumed looking at the picture that it was a cow and calf but I did wonder why the bonnet was so low. I have heard both terms before but not made the destinction between them I've not come across anything like this (...) (19 years ago, 25-Apr-05, to lugnet.trains, FTX)
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