I'm glad you resolved your problem with some repair because you shouldn't have any problem with double
heading in DC or DCC with a 16 car train plus track cleaner. I double head like that all the time. I do have one pair of engines (Stewart AS-616s) that will run 20+ cars fine for about 2 hours and then they will just slow down and quit. It's a temperature problem...the motor/electronics just crowd all the space such that air cannot circulate naturally. After a cool down (20 minutes or so) they run just fine again. I plan to (hah) open up some of the air fan moldings to let a little air circulation occur and maybe solve this (little) problem.
heading in DC or DCC with a 16 car train plus track cleaner. I double head like that all the time. I do have one pair of engines (Stewart AS-616s) that will run 20+ cars fine for about 2 hours and then they will just slow down and quit. It's a temperature problem...the motor/electronics just crowd all the space such that air cannot circulate naturally. After a cool down (20 minutes or so) they run just fine again. I plan to (hah) open up some of the air fan moldings to let a little air circulation occur and maybe solve this (little) problem.