While reading the topic "I Saw Big Boy 4014 today" I read a mention of the reason why the 4014 wasn't making much of any noise, that being that it wasn't pulling anywhere near its capacity.
That got me to thinking about our "little" models. Certainly pulling power has improved over the postwar and MPC eras with the advent of bigger scale-proportioned locomotives, many of whom are capable of pulling more cars than most layouts are capable of hosting.
But back to the biggest of the bunch. Those of you with articulated steamers and the real estate to put an appropriate load behind them, at what point have you observed your locomotives actually seeming to work at pulling their trains?
(My 'test track' is only an 11x17 loop, and my largest locos (currently a Big Boy and an Allegheny) probably won't even notice the longest trains that will fit on it.)