{
 "object": "thermoacoustic-shroud-fin-sleeve",
 "license": "CC BY 4.0, Xem Studio",
 "les": "https://longearthsociety.com/engineering/",
 "files": [
  {
   "name": "ta-fin-sleeve-half-2in-34-r36",
   "step": "/files/hardware/thermoacoustic-shroud-fin-sleeve/ta-fin-sleeve-half-2in-34-r36.step",
   "stl": "/files/hardware/thermoacoustic-shroud-fin-sleeve/ta-fin-sleeve-half-2in-34-r36.stl",
   "note": "fin-sleeve half (y ≥ 0.5): bore Ø50.8, wall 3, radial fins 1.5 thick to Ø72 every 15° (none within ±20° of the ears), 34 long; ears x ±27.9..36 with Ø4.5 at x ±32: fits inside the flame shroud's band"
  }
 ]
}