Hello train enthusiasts,

hello everyone, i wanted to see if anyone out there got the New atlas RS3 i picked one up and as i move the engine it sounds like a plane taking off wanted to see if anyone had the same problem the Loksound guide  are not really helping me out.

I know that railroad equipment has changed over the years, but some standards such as air lines and couplers, have changed but slowly.  How far back in time from today were the couplers and air lines (don't worry about other things...) interchangeable so that you could back up a stock locomotive from say, 1900 or earlier, to a modern freight car, hook up the brake lines and couplers, and go?

I need help identifying some rolling stock I picked up at a train show.  The back story was the previous owner would take the kits (vendor I.D.'d as Athearn) out of their box, assemble them with new Kadee couplers, put them back in the box and put them on a self.  The problem is the couplers are not correct and causing issues.  I checked with the Kadee conversion chart to see if Athearn hoppers required something different than the boxcars I got, but didn't get any good info.  Before I get too crazy, I thought I'd throw this out there.