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Progress 28 August 2006

Well, there is to be a slight change of plan to the woodwork. Originally, there was to be two operating/access holes in the whole board, of 400*400mm each. (The middle of the board was going to be "B-space-C-space-B"). Instead I've decided to make just one access hole in the layout of 800*400mm instead. I can make this change easily by using "B-B-space-C" as shown above. The hole is just for access, and will be covered with scenery when the layout is finished. I've finally managed to buy some replacement hotwire for my expanded polystyrene foam cutter. The cutter is supposed to be operated with a battery, but I use 4.5V DC output from a power pack to heat the 50mm length of wire. The photo above shows a block of expanded polystyrene foam (1200*400*23mm approx) marked out to be cut to standard sections which I will use to elevate the track.

The block will be cut into standard straight lengths and widths of (230*58mm) so that it can be rearranged just like the track sections. For curved track I'm not going to cut blocks to the shape of the curve. Instead I plan to leave spaces between sections of polystyrene block, but on the top level, I will use thin card to provide the continuous surface required for scenery etc

The idea is to use this polystyrene under my track to create gradients as required. For scenery, it won't be necessary for a flat finish, but for track it is. Now the contractors have ordered 35 units so far, to elevate parts of the track. With the track elevated, it is now possible to have road and rail bridges. Each block is 23mm in height, so at least 2 will be required for a low height rail overbridge for road traffic, and at least 3 blocks will be needed to clear rail traffic on two levels.
 
This photo shows what might be possible. All the scenery would be added after the track height is set. Next steps are to decide on what track plan to follow...

 

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