I am just starting up in n scale and wanted to know what is the min radius for curves[:)]
This question depends on a lot of things–the type of railroading you are doing, the era you are modeling, the length of rolling stock you will use, etc. I model N scale in the modern era and I use18" min radius on the main line and 12" on industrial sidings, etc. The is what I would consider minimum–wider curves (22" or larger) look even better on the main. Technically you can run as small as 9" or 10", but I do not recommend it for looks and operational purposes, especially with any roling stock over 45 scale feet in length.
Ron
[#ditto]
This page on the NMRA’s site http://www.nmra.org/standards/rp-11.html gives minimum recommendations based on the equipment you’ll be running.
Enjoy
Paul