Tom, I’m pretty sure I saw an article by Bruce in GR, but can’t find it. Maybe someone else knows?
However, Bruce did describe the process in an MLS thread:
Making log loads removable
I have a bunch of log skeleton cars that I made from Don Winter kits awhile back. Up until now, the skeletons have either been loaded or empty.
However, when I operate, I want them to either be loaded or empty - and I didn’t want to swap out loaded cars for empties; or vice versa.
What I needed was a way to securely hold the logs in place. Of course I already had chains to do this, but I needed a connection that would be not only strong, but also easy to connect and unconnect. And, if the chain falls off the empty, there IS a danger of it catching on a switch or something else that will derail the car. Ask me how I know.
Back when I was working on operating gladhands (http://www.largescalecentral.com/LSC…ic.php?id=8589), I ordered lots of different magnet types from http://www.kjmagnetics.com/. One of the types that didn’t work for gladhands looked like it could work for connecting the chains.
I had some 1/8" diameter x 1/4" long cylinder magnets. What makes these interesting is that they are diametrically magnetized. They stick to the sides of the cylinders rather than the ends.
Another interesting thing I discovered is that my “brass” chain was magnetic! Perfect.
I first tried some epoxy to hold the magnets to the end of the chain, but this wasn’t very secure.
So, I tried some 1/8" ID aluminum tube cut into short sections and glued the magnet inside that.
When I punched the cylinder for drilling, it squished the ends which further helps to hold the magnet in place.
I drilled a small hole and routed some “S” hooks through them.
So, two chains, with a magnet on the end of each. I put the logs in place and pull the chains tight and place the magnet against the chain.
When it’s empty, I can just coil up the chain on top and it sticks to the magnets.
It works great. When it’s loaded, I can pick up the car by just the logs and there is no slipping at all.
And here’s a pic of one of his log cars on my shelf. Both sides have their own chains, so 4 chains total, each with its own magnet. They lace up and snug the logs together perfectly.