Old 10-07-2010, 09:03 PM   #1
baldwin8
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Default Something I shot today

I don't think it is really unusual but could someone tell me some details of what it is used for. I've seen it referred to as a CN IOX.

I was thinking about submitting it to RP.net but the sun was not at it's brightest.


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Old 10-07-2010, 09:34 PM   #2
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It's a slug. It has traction motors that draw their power from the prime mover of a normal diesel locomotive. Using a slug gives you more pulling power at low speeds by applying the horsepower to additional traction motors.

They are mostly used in yards and transfer moves.
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Old 10-08-2010, 12:43 AM   #3
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Quote:
Originally Posted by baldwin8 View Post
I don't think it is really unusual but could someone tell me some details of what it is used for. I've seen it referred to as a CN IOX.

I was thinking about submitting it to RP.net but the sun was not at it's brightest.


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They are called slugs, or as CN calls them YBU-4 (Yard Booster Unit). They provide additional tractive effort (and stopping effort) at low speeds where they are best at since high horsepower isn't a big concern, the GP9RM/Slugs sets are rated for 10,000 tons on dry rail when we use them for pull down and industrial assignments at MacMillan Yard.
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Old 10-08-2010, 03:33 AM   #4
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We have one up here in Duluth. Slug between two GP9RM's.

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I personally have had a problem with those trying to tell us to turn railroad photography into an "art form." It's fine for them to do so, I welcome it in fact, but what I do have a problem with is that the practitioners of the more "arty" shots, I have found, tend to look down their nose's at others who are shooting more "mundane" shots.
Railroad photography is what you make of it, but one way is not "better" than another, IMHO. Unless you have a pole right thought the nose of the engine! -SG
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Old 10-08-2010, 02:37 PM   #5
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Originally Posted by trainmaster_1 View Post
They are called slugs, or as CN calls them YBU-4 (Yard Booster Unit). They provide additional tractive effort (and stopping effort) at low speeds where they are best at since high horsepower isn't a big concern, the GP9RM/Slugs sets are rated for 10,000 tons on dry rail when we use them for pull down and industrial assignments at MacMillan Yard.
Com'on Michael, CN rates everything for at least 10,000 tons
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