Min Curve & Performance Of Lionel Genset Switchers ?

Smoothest slow speed loco that I've ever seen, even with a load. However, because of the fixed pilots, you really need to have it pointed nearly straight down the track for doing switching work. It'll run around O54, but you cant couple cars on an 054 curve. Even with O72s, because the couplers are independent of the trucks, they dont swing, so you need to be going straight in order to get the couplers to align.

I have the UP version and as boilermaker1 has said it is the slowest most smooth engine I have ever run. He is also right about the couplers. 

I can't speak for how it will switch on your curves but mine runs beautiful and at very very slow speeds. I just run mine around my 0-84 Fastrack curves but I don't think you would be disappointed with it. The sounds are awesome! You can hear each Gen start as you gain speed like the prototype. If you leave it in idle for a few minutes the engine sound will shut down just like the prototype.The smoke unit will smoke you out of the room on low!