On Wednesday night (11/30/22), we were at Kennywood for some maintenance work and took a break to conduct this experiment to see if a 137 car ore train (about 80 feet of train! ) could be reliably pulled around the layout. And while the Lionel Big Boy pulled it like a champ, we are not likely to run this train when open to the public as finding any derailments would be a lot of work (a lot of ground to cover with people moving around the layout).
Andy