mth engine pulling pass. cars

My MTH NYC Hudson class models (all Premier) have no trouble pulling more than 12 passenger cars, on flat track. In fact, one of my buddies uses an MTH NYC Hudson to pull his 21" scale, 12 car 20th Century Limited train set, from Golden Gate Deport, which is a REALLY HEAVY train. 

Ditto on that. We had a club member that pulled 10 K-Line 21 inch cars with his unstreamlined MTH Hudson with PS2 (number??).

Pete

thanks alot