I find it sad that wonderful paper models of engines and carriages are designed with drab 1-dimensional wheels. That is why I designed a simple mathematical formula to calculate the form of a 3-dimensional wheel with 3 parts. With this improvement, I have been able to improve the excellent models of Albrecht Pirling.
If anyone is interested, I also improved a number of my aircraft models (see my latest DC-3 on www.bobscardmodels.net76.net and http://www.papermodelers.com/forum/aviation/23813-dc-3-1-30-rear-alan-roses-beautiful-trophy.html, ) constructing the wheels as made up of numerous paper discs.
If anyone is interested, I also improved a number of my aircraft models (see my latest DC-3 on www.bobscardmodels.net76.net and http://www.papermodelers.com/forum/aviation/23813-dc-3-1-30-rear-alan-roses-beautiful-trophy.html, ) constructing the wheels as made up of numerous paper discs.