Minimum Radius Curve in Gauge 0

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Track construction.

Many years ago I ran Hornby Clockwork Tinplate which had 2ft radius curves, Now ACE trains make a fabulous 'Duke of Gloucester' in gauge 0 which will also go round 2ft radius curves, looks silly some might say but at an exhibition the sheer size of it creates its own illusion - and it works! However, has anyone any idea what the minimum radius a Dapol 0 gauge Terrier will negotiate? Minerva models state that their Gauge 0 Locos will negotiate Peco gauge 0 setrack which are a tad over 40" radius - they are intriguingly marketed as No2 Radius, what is No1 Radius? What radius for example was the old lima 0 gauge curves and will a Dapol Terrier negotiate it? Any ideas anyone? 
Thanks

Simon. 

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Simon

Peco technical information that is available shows both the Setrack points and the ST725 curves are 1028mm (40.5 inches) radius.  The curves and the points rotate through 22.5 degrees - the same geometry as OO and N gauge I believe.

1028mm x 4 / 7 = 587mm or about 24 inches - In OO gauge the Settrack 2nd radius is 17 1/4 inches so the O gauge one is a lot wider - more akin to Peco Streamline small radius pointwork which is a nominal 2ft radius.

I know this doesn't answer your question but it might imply that any short wheelbase 6-coupled engine will be fine on the 7mm Setrack curves.

Barry

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Dapol Joel says their Terrier is designed for 40" curves (R2). Dapol Digest, 1st June 2016.

Nigel

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Thanks Barry, the technical aspect is a great help.

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Thanks Joel, thats a help.

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