Your a star thanks for all that. I'm going to take my time and try and get it so "it looks right" in the garden and it can become part of the garden. I have basically a square garden no obstructions as such. As somebody alluded to it's more of an engineering job when your planning an outside railway... Cheers Steve
Take a cab ride around Mick's railway from last year https://www.youtube.com/watch?v=XbcYahEjf3I&t=400s
If you were to ask me to guess I would say the tightest curve around the back of the shed was around 6 foot radius. The scenic areas look shallower, maybe 8ft minimum.
The shallower the curve the better it looks but the more space it will take out of the garden.
What you do really has to be driven by what you have the space for and what obstacles you have in the garden. I went out with a long pole and waved it about to figure what likely radii would work around my garden.
Thanks ever so much for getting back to me Have you done it all the way round the garden like that or have you mixed it up a bit. Are you happy with a single track and what the radius of the curve as it goes round. Sorry about all the question. Thanks a million Steve