We have HO, is there a limit to the length we can make the track loop?  We made an oval roughly 10' long.  Our locomotives would only move about 10 pieces of track away from the power source (in either direction) before they would just come to a stop.  What up wit dat?  And if this is reality...how do you professionals fill rooms with hundreds of feet of working rail line??  We have a Tech II controller.
My wife is looking at me like.."honey, if you can't get a model train to work, please don't ever work on the car!"

I'm new with this train stuff.  My kids were given a lot of HO items.  We layed out a simple oval and had no problems with an Athearn F7A Super Power locomotive.  However, the USRA 0-6-0 steam locomotive that came in a complete kit seemed to have power issues.  The 0-6-0 hesitated every time it passed over the terminal/rerailer.  The F7A passed right over it without any problem.  Anybody know why?