{
 "object": "free-piston-power-piston",
 "license": "CC BY 4.0, Xem Studio",
 "les": "https://longearthsociety.com/engineering/",
 "files": [
  {
   "name": "power-piston-30x30",
   "step": "/files/hardware/free-piston-core/power-piston-30x30.step",
   "stl": "/files/hardware/free-piston-core/power-piston-30x30.stl",
   "note": "power piston Ø30 (= the Ø30 liner bore; clearance-seal running fit) × 30, Ø5 rod bore"
  },
  {
   "name": "power-piston-40x40",
   "step": "/files/hardware/free-piston-core/power-piston-40x40.step",
   "stl": "/files/hardware/free-piston-core/power-piston-40x40.stl",
   "note": "power piston Ø40 (= the Ø40 liner bore; clearance-seal running fit) × 40, Ø5 rod bore"
  }
 ]
}