{
 "object": "thermoacoustic-stacks-and-resonators",
 "license": "CC BY 4.0, Xem Studio",
 "les": "https://longearthsociety.com/engineering/",
 "files": [
  {
   "name": "stack-blank-1.5in-30",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-1.5in-30.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-1.5in-30.stl",
   "note": "stack blank \u00d834.2 \u00d7 30 for the 1.5 in bore: slice with 0 top/bottom layers, 1 perimeter, honeycomb or grid infill; density sets the cell size (see table)"
  },
  {
   "name": "stack-blank-1.5in-40",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-1.5in-40.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-1.5in-40.stl",
   "note": "stack blank \u00d834.2 \u00d7 40 for the 1.5 in bore: slice with 0 top/bottom layers, 1 perimeter, honeycomb or grid infill; density sets the cell size (see table)"
  },
  {
   "name": "stack-blank-1.5in-50",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-1.5in-50.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-1.5in-50.stl",
   "note": "stack blank \u00d834.2 \u00d7 50 for the 1.5 in bore: slice with 0 top/bottom layers, 1 perimeter, honeycomb or grid infill; density sets the cell size (see table)"
  },
  {
   "name": "stack-honeycomb-1.5in-40-c1.5-reference",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-honeycomb-1.5in-40-c1.5-reference.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-honeycomb-1.5in-40-c1.5-reference.stl",
   "note": "explicit 1.5 mm hex honeycomb stack 1.5 in \u00d7 40 (reference geometry; the blank + infill route is faster)"
  },
  {
   "name": "stack-spiral-1.5in-40-g1.0",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-spiral-1.5in-40-g1.0.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-spiral-1.5in-40-g1.0.stl",
   "note": "spiral (rolled-sheet) stack 1.5 in, 40 long, 1.0 mm gap (also a template for rolling film + fishing-line spacers)"
  },
  {
   "name": "driver-cap-1.5in-40mm-speaker",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/driver-cap-1.5in-40mm-speaker.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/driver-cap-1.5in-40mm-speaker.stl",
   "note": "1.5 in ISO 2852 cap with a socket for a 40 mm speaker (thermoacoustic refrigerator driver / engine load)"
  },
  {
   "name": "stack-blank-2in-30",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-2in-30.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-2in-30.stl",
   "note": "stack blank \u00d846.9 \u00d7 30 for the 2 in bore: slice with 0 top/bottom layers, 1 perimeter, honeycomb or grid infill; density sets the cell size (see table)"
  },
  {
   "name": "stack-blank-2in-40",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-2in-40.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-2in-40.stl",
   "note": "stack blank \u00d846.9 \u00d7 40 for the 2 in bore: slice with 0 top/bottom layers, 1 perimeter, honeycomb or grid infill; density sets the cell size (see table)"
  },
  {
   "name": "stack-blank-2in-50",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-2in-50.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-2in-50.stl",
   "note": "stack blank \u00d846.9 \u00d7 50 for the 2 in bore: slice with 0 top/bottom layers, 1 perimeter, honeycomb or grid infill; density sets the cell size (see table)"
  },
  {
   "name": "stack-spiral-2in-40-g1.0",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-spiral-2in-40-g1.0.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-spiral-2in-40-g1.0.stl",
   "note": "spiral (rolled-sheet) stack 2 in, 40 long, 1.0 mm gap (also a template for rolling film + fishing-line spacers)"
  },
  {
   "name": "driver-cap-2in-40mm-speaker",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/driver-cap-2in-40mm-speaker.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/driver-cap-2in-40mm-speaker.stl",
   "note": "2 in ISO 2852 cap with a socket for a 40 mm speaker (thermoacoustic refrigerator driver / engine load)"
  },
  {
   "name": "stack-blank-3in-30",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-3in-30.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-3in-30.stl",
   "note": "stack blank \u00d872.3 \u00d7 30 for the 3 in bore: slice with 0 top/bottom layers, 1 perimeter, honeycomb or grid infill; density sets the cell size (see table)"
  },
  {
   "name": "stack-blank-3in-40",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-3in-40.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-3in-40.stl",
   "note": "stack blank \u00d872.3 \u00d7 40 for the 3 in bore: slice with 0 top/bottom layers, 1 perimeter, honeycomb or grid infill; density sets the cell size (see table)"
  },
  {
   "name": "stack-blank-3in-50",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-3in-50.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-blank-3in-50.stl",
   "note": "stack blank \u00d872.3 \u00d7 50 for the 3 in bore: slice with 0 top/bottom layers, 1 perimeter, honeycomb or grid infill; density sets the cell size (see table)"
  },
  {
   "name": "stack-spiral-3in-40-g1.0",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-spiral-3in-40-g1.0.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/stack-spiral-3in-40-g1.0.stl",
   "note": "spiral (rolled-sheet) stack 3 in, 40 long, 1.0 mm gap (also a template for rolling film + fishing-line spacers)"
  },
  {
   "name": "driver-cap-3in-40mm-speaker",
   "step": "/files/hardware/thermoacoustic-stacks-and-resonators/driver-cap-3in-40mm-speaker.step",
   "stl": "/files/hardware/thermoacoustic-stacks-and-resonators/driver-cap-3in-40mm-speaker.stl",
   "note": "3 in ISO 2852 cap with a socket for a 40 mm speaker (thermoacoustic refrigerator driver / engine load)"
  }
 ]
}