JHZ563,
Happy Switcher Saturday! I hope you’re feeling better.
On SWSAT last week, there was a discussion about couplers and derailments with Rutland #500, a model of a GE 70-ton diesel switcher by Williams-by-Bachmann.
RSJB18 wrote:
“…. The engine has fixed pilots. On tight curves, the coupler moves so far off center that it's pulling the freight car off the rails. I have the same problem with a few of my engines. Especially my WbB Rutland 70 tonner.”
Steam Crazy wrote:
“…. I have the same problem with my Rutland 70 tonner. Lionel cars must have slightly longer drawbars, because I’ve found they’re less likely to derail than my MTH and K-line cars. Give Lionel a try.”
Steam Crazy also said:
“I only have the problem on my O-31 inner loop. The lead car, regardless of make, doesn't derail on my O-42 outer loop, so you shouldn't have a problem.”
I have one of these engines and like it very much. It’s scale-sized, nicely detailed with fixed pilots, runs very well, was inexpensive, and is the only Williams product that I own. I usually run it on my 10’-by-5’ layout with Atlas O-54 curves and haven’t encountered any issues with couplers or derailments. But I decided to investigate – just to have a session with my trains.
First, I saw that the opening in the fixed pilot is narrow and can restrict the sidewise movement of the coupler (Photo 1). I have an Atlas O-36 oval on my 12’-by-8’ layout, so I placed the engine on some O-36 track and coupled it first to an MTH caboose, and then to a K-Line boxcar. Both cars coupled to the engine without any problem (Photos 2 and 3) and there still was clearance for the engine’s coupler to pivot further. But the coupler on the K-Line boxcar is short and rigidly attached to the truck, so it can only pivot with the truck, and it looks like it could pull the car off the track on an O-31 curve. On most of my boxcars, the couplers pivot independently of the truck – which is better on tight curves. Having checked that the engine and K-Line boxcar coupled properly on O-36, I placed them on the inner loop of my 12’-by-8’ layout and ran them without any problem (see remaining photos and videos).
The Rutland #500 is an excellent model but looks better on my 10’-by-5’ layout with O-54. I have a Rutland wood caboose on order from MTH but, for now, I run #500 with the unlettered red caboose seen in the videos.
MELGAR