Has anybody try to see how much a railking steam locomotive will pull?

With my RFP Berk, SF Norhtern and my SP Mohawk, I have pulled as many as 30 cars but not over that. These were 027 Boxcars.

My mth railking Mohawk  would walk away with that no problem.But after 41 cars I would have couplers start to pop open.From then on it was trying to find the right cars with strong couplers that would not pop open.It was trail and error but once I got things right.It was something to see a locomotive pulling a long string of boxcars. 

I think that answer could vary from RK engine to RK engine.  My problem is not so much the pulling power of the engine as it is the random popping of fright car couplers on long heavy trains.  We've done over 50, but at some point a coupler will pop open.

Have Fun!

Ron

Its tricky you have to spread the weight out more.To light up front right behind the locomotive.Train wreak to light in the middle is also bad idea.But heavy cars behind the locomotive and in the middle of the train not to light.Its always best to have the lighter cars at the end.But your right about couplers poping open.Oh track can come into play.I had my trains on the floor which had carpet.Over time the weight of the trains had press the carpet in to a low spot.Took me half friday night trying to fix the problem.After a while I got my hands on some small wood.And got that took care of the low spot.I used to be in ho.O gauge trains have more weight to them.