Dave,
In this photo, it looks like the center beam extends far enough to provide a place for a coupler. You might have to add a rectangular pad depending on whether the beam is one solid piece. It would also serve as a shim to lower the coupler to the right height above the rails.
I'm going to have to find one of those cars to look at. Might see about mounting arch bar trucks in place of those "modern" Bettendorfs anyway....and maybe find a real "log" while I'm at it.
Jim
Jim,
I tried mounting the truck on this 1/2 inch towards the end of the beam. besides looking strange with the coupler extending out the extra length it didn't correct the derailing problem. The Shay still pulled it off the track every time just as the car is reaching the start of the curve.The coupler on the engine has to be moved back 1/2 inch so the angle is greater then present.
Are the couplers on these cars fixed to the truck or can they swing independently? Have you tried pulling an Atlas reefer or MTH caboose? They both have couplers that will swing independently regardless of the position of the truck itself.