I am using these coal gondolas from Barnez BNSF Chicago route on The Powder River Basin route. I have used TS_Tools to replace the supplied gondolas with these. What I am getting is some of the cars are tilted right some are tilted left some are not tilted. When going around a superelevated curve all tilt correctly until on a level track. What could cause this. When looking at the trucks some are above and some are below rail level.
I reported this issue before (several times). It seems to have a few components and reasons. First, some random tilt increases realistic look. That part might be intentional. Second, it only applies to the consists activated for the player. You can reset it by abandoning it and then returning. Third, it seems to grow over time, and mostly (only) affecting the loaded state. Fourth, save & reload resets it. This and the previous are similar to the cab view shifting due to some force buildup internally. (That was separately researched by Spikee. He deduced it's about sharp grade changes, although even a HST on ECML South does it.) Spikee noticed that these wagons (a lot of them, likely copied from some old gondola model) do not have some physics setting which is a force / coefficient causing it to return to neutral. Probably there is a default value but very low, and one of these gradually building values causes each car to tilt in a specific direction, and return to it. But these old gondolas are prone for various issues, curiously they are stable on Ohio Steel but otherwise they separate extremely often. Funny enough I figured that hitting 25 mph is pretty much a prerequisite. If you watch them passing through crossovers, they tilt madly. Branding aside I found the Canadian Mountain Passes gondolas to be nice. Taking their physics is a good start.
The missing bogie suspension on Kuju stock (probably using hardcoded defaults in KujuRS) was one thing I noticed, I haven't dug into the issue deeper yet. For some reason, the axles are tagged as "Powered". Probably a relic of the (obviously at some time abandoned) RS/RW conversion, which left some stock without dynamic lights or rain effects (reason why Fort Kent only features the UP SD40-2 now), and the new Cajon skydome in the unused "new" RSC\CajonPass assets also unfinished after the RS assets were updated and split into RailSimulator/RailSimulatorCore/RailsimulatorUS).
Interesting. Could be a reason why I noticed loaded gondolas to propel my train in one direction. Slowly, but surely.
