scharnhorst wrote:Seems like I read some where that the Conrail bathtub gons opened up on the bottom like a hopper dose and as you said they had trouble with the bottoms splitting open. I think the solution was that the hatches were welded shut and the cars converted with rotary couplers. I'll have to chek a bit deeper into my Conrail history books and see.these bathtub cars are for rotary dumping that comes with rotary couplers.