... RMweb: http://www.rmweb.co.uk/community/index.php?/topic/69736-pencarrow-pg155-new-templot-plans/page-162#entry2512902 What operates the wing rail? Geoff Cook posted: 29 Nov 2016 00:22 from: Martin Wynne Hi Geoff, It's a spring crossing. The wing rail is forced open by the wheel flanges -- because of this it is very important that the check rail is correctly positioned and well maintained. Here are the words and music from BRT3: 2_281920_520000000.jpg 2_281921_080000000.jpg regards, Martin. posted: 29 Nov 2016 00:35 from: Geoff Cook Thanks very much Geoff posted: 9 Dec 2016 06:15 from: rodney_hills Hello, The obvious next question arising is: Has anyone built a model of same, that operates prototypically? Regards, Rodney Hills posted: 9 Dec 2016 12:58 from: Roger Henry OK. I can see from the drawing how a spring 'frog' device can work, but the drawing does not really resemble the photograph. Well, it seems ...