Cut out each support, taking care to always stay on the outside of the pencil line, to ensure that all supports are consistent (so they're all...
Z-Bend Track standards (24" sides) using 1/2" kiln dried clear pine. Rabbited inside for 2" foam core to sit in. Allows cutting...
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"...
Carved out cardboard supports using the measurements for a 7mm subroadbed and test-fit the spiral ramp to them. Putting a ramp onto supports is...