According to my Hornby catalogue, the spacing between track centres is
Kevin
My prototype used 3750mm = 43mm in HO. I actually use 50.8mm on sharp curves and then taper down to 45mm on straight sections.
Regards, Greg.P.
Hornby and Peco Setrack curves are made in radii of 371, 438 and 495mm, and all their turnouts and crossings are designed to fit with these. I expect the reason is to allow the longest coaches and locos to pass on curves without fouling each other. Recent Hornby Superdetail locos and longer coaches are not recommended for use on 371mm first radius. If you are using flextrack and/or (e.g.) Peco Streamline, use whatever spacing you can get away with considering the tightness of your curves and the overhang of your rolling stock. On the 00 layout I am building, I use
51mm on straights and at least 54mm on curves; my longest loco is a Duchess and my longest coaches are the older Hornby Pullmans.
I read somewhere that prototype track spacing was 11 ft 2 in between centres, which is 3357mm = 45mm in 4mm/1ft scale.
Peco Streamline points and crossings give a double-track spacing of
52mm.
Correct, for standard UK double track.
Ditto except I widen out as needed not to 50.8. And your curves would probably been seen as generous by many, those with Mk3s on 2ft radius will have to widen out more than that. Keith Make friends in the hobby. Visit Garratt photos for the big steam lovers.
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