Thursday 2 February 2012

Slug busters and machine screws

Tuesday of this week was one of our busier days with TG. Colin Calverley came with me to FWB engineering supplies in Stoke-on-Trent to source some of the fixtures and fittings for the layout. Countersink hexagonal drive machine screws with their associated Nylok nuts and washers are recommended for the aluminium assemblies and also for securing the EM gauge society baseboard locating dowels to their backing plates. Whilst a tool called a 'slug buster' is apparently ideal for drilling the 1 inch hole (through the aluminium end plate pairs) in which the dowels can be accurately located. Needless to say the required tools were ordered.

The afternoon saw the two of us cutting various thicknesses of plasticard spacers and supergluing them to our uneven worktable to provide a perfectly level support for the 6ft x 2ft plate glass. This will allow the baseframes to be checked accurately during construction.

The evening involved a visit to Nick Allsop, our track and signalling guru to discuss the revised track layout and likely signalling equipment provided in such a situation. TG will have two signal boxes, one adjacent to the junction and the other effectively a yard box at the other end of the station. An additional siding will be provided on the down side and the goods shed will now be a continuation of the dock at the rear of the station. Provision of a Credition style footbridge will also bring in a co-acting up platform starting signal. Provision of a junction starting signal at the Plymouth/Barnstaple end of the up platform will facilitate auto trains arriving from those directions, reversing and departing towards same. Opportunities for lower quadrant  semaphores will be the inner home signals in the up direction immediately prior to the curving girder bridges.

  

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