Crossing the vertical lines at the correct heights (triple checked!) for each loop. These horizontal lines will be the supports the sub-roadbed...
Transferring 26mm wide vertical lines to the wooden supports. Each loop gains 26mm in radius as it winds around the helix.
Placing the cardboard supports on the wooden strips, shuffling them around to use the minimum material while leaving room for sawing around them.
Slicing 17mm thick plywood into 320mm high strips. That's 311mm of highest helix support, plus room for saw blades. Just as well, the two strips...
Slicing 17mm thick plywood into 320mm high strips. That's 311mm of highest helix support, plus room for saw blades. Note metal "rail"...
3/18/06 - Lower level views from from door of house. Far corner is end of 9 track staging yard.
3/18/06 - Lower level. Across on the far left wall is the staging area of 9 tracks.
