There have been people on this and another forum who show a design in a fairly large room with small radius corners joined by straights. They say that the corner curves will be under tunnels.
The great advantage of larger radius curves is that you don't need to put them in a tunnel; they look all right out in the scenic area. In fact I would say have no straights at all and this is what I have done on my layout. Assuming that you are going to have a complete circuit make it as large an oval as possible.
I'd go as far as to recommend avoiding straights as much as possible.
long straight bits, with sharp curves at the end, simply do not ''flow''......and 'flowing'' track is so much better from a viewpoint aspect.
Even if your available width is limited, and a tight radius is unavoidable...then I also recommend a ''transition' curve on entry and exit..ie much larger radius leading into the curve, gradually tightening up, then opening out again on exit...much the same sort of line a decent driver takes when negotiating a curve in the road?
this has the strange advantage, because the transition 'leads' a coach, or loco, into the curve....of creating a stable ride....no sudden jerks...
the strange advantage?
it 'is' possible, to actually have an even tighter, minimum radius in the centre of the curve........than would have been thought......simply because the stock going through is already riding smoothly.
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