Power Needed to Pull the Columbian

Hi Ed,

I use a converted MTH E6 A-B, 2 factory motors in each to pull a 6 car GGD Columbian up 1.5% .  I realize it is lighter duty than your scenerio, but it does the job with no issue.  I have a second dummy A that I sometimes add to the train.

ED,

I was curious so I took a Atlas F3 with twin vertical mount motors and hooked it to my 6 GGD columbian cars and then added two more GGD aluminum from my Cinncinatian.  The single A unit had no problem  pulling the 8 cars up 1.5% grade which wraps around a 180 degree curve.  I added 3 more cars but the single A unit slipped with the 11 cars.  If I added the dual powered 2nd A unit, it took off with all 11.  This is a 2010 version Atla F unit, not the earlier version from the 70s.

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