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I'm trying to understand my dad's train collection to set some up a layout for my son. I have a weaver hi rail ds-3 diesel locomotive. How do i know if it is 2 or 3 rail? Trying to figure out if it fits with the rest of the lionel collection.
 

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Sorry no one has replied. The difference between 2 rail and 3 rail is pretty easy and I am one of the dumbest members of this forum. 3 rail receives their electricity by as it sounds - a 3rd rail in the middle of the track. On Locomotives, this means flip it upside down and if there is a metal roller with spring tension to push it down, that's 3 rail. 2 rail means the track does not have the center rail for electricity, so electricity runs through the 2 outside rails.

More authentic as they say but most of us on here run 3 rail. The 3rd rail becomes ubiquitous and sort of forgotten.

Hope that helps you discover what you have.
 

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Typically...hi-rail = 3 rail. As mentioned above, flip it over, if it has a center roller between the wheels it’ll confirm the box is right and you have a 3 rail loco.

Don’t overthink this.
 
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