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7mm/ft 1:43.5 scale model LNER stop block as measured at Bishops Stortford in 1997. There is also one extant by the goods shed in the East Anglian Railway Museum at Chappel and Wakes Colne station.
This is a kit of parts requiring the builder to provide a crossbeam from rail or wood (approx 8ft x 14in x 7in, these items are ideal); some glue and paint.
The diagonals and uprights are overlong to enable the builder to replicate the attachments to a second track panel located beneath the running line; this helped keep the real thing stationary when hit by a moving train!
I believe this design may have originated with the GER as there are photographs taken in May 1911 at Ongar (published by Irwell Press in "Great Eastern In Town & Country, volume 3") which show a couple of examples. The uprights seem to be fixed to the inside of the running rails, rather than the outside, and the wooden crossbeams seem to be of the order of 9ft x 18in x not very thick.
The rendered images show in pink the items included in the kit -- all other items must be provided by the builder. Note that the kit is designed to be used with C&L moulded ABS chairs (which raise the rail clear of the sleepers) and code 125 bullhead rail.
For prototype information, instructions, photographs, hints and tips please go to our web-site.