Helix Construction on the Lucaston & Southern - Model Railroading

Originally made as a presentation for the Trinity River Division for the NMRA, this video shows how I built my double helix for my N-scale layout. Helix Specs: 1/2" cabinet grade plywood cut into 5-1/4" strips Segments cut at 15-7/8" on long end 38" Total width of level 2.3% Grade 2.67" Total height between levels 2.2" 'Finger' clearance between levels 18.5" Elevation change 18-3/8" Radius outer loop, 17-5/8" Radius inner loop Circle jig is calibrated for 1/4" bit so outer loop routed at 36" and inner loop routed at 33" with 3/4" bit to get the above radius. Routing depth at 1/8" 51 pieces of Atlas Code 80 flex track mounted with ME medium rail spikes. Music Credit: bensound.com