Has anyone built from scratch or converted a loco for rack operation, ie added a gear wheel to a driving axle to engage with a rack on steep gradient? If so I would appreciate your advice/thoughts on the job. Thanks Alan
I havent myself but Fleischmann sell / sold an N scale rack loco that pops up on eBay now and again and I'm sure Brian would keep an eye out for one for you if asked.
There is also a range of Swiss rack models built to HO scale (runing on 10.5 mm gauge track I think) but they tend to be a bit pricey when I have seen them on eBAy.