Read an interview by John Cubbin with Walter over at Raildig about this Shay. Search for raildig dot com and click on the raildig guest link.
We had a customer question and so I'm including it here for your information.
He wanted to know the minimum curve radius required for operating this shay.
We asked one of our experts and this was his reply:
Our local Nn3 modular club recommends a minimum radius of 11" (280mm).
My test track includes 195mm (7-5/8") radius Rokuhan curves.
The loco will probably run on tighter than that, but tighter curves than that should not be necessary.
It also depends on whether or not the builder includes drive shafts. I do, and size them to work on 195mm curves.
This Nn3 locomotive is also a featured article in N Scale Magazine July/August 2015 Edition (volume 27 number 4).
The seven page article, The Short & Nn3arrow, is authored by Thomas Knapp and features many colorful photos
of a step by step build and his unique artistic touches to this detailed kit designed by Walter.
He also does a review and "how to" procedure on JAX Pewter Black to blacken this model kit.