Good evening, for me it was MTH Railking Pennsy I1.
This engine has pulling power but no traction. MTH defiantly missed the mark on this one.
I compared this engine to my MTH Railking Pennsy M1A which was released before the I1 model.
The M1 pulling a consist of 15 or 20 coal two bay coal hoppers would never miss a beat pulling a grade at any speed.
The I1 would spin out before the engine had the same train half way into the hill. Tried new traction tires and had the same result. It has to be the balance of the weight on the drivers is off.
The I1 ( prototype and model) has no trailing truck which could be contributing to the traction problem.
Not sure if MTH made any changes to correct this problem on the Imperial line of I1's or not.
The I1 was the only MTH product I ever purchased that I was not impressed with.
