{
 "object": "tri-clamp-power-piston",
 "license": "CC BY 4.0, Xem Studio",
 "les": "https://longearthsociety.com/engineering/",
 "files": [
  {
   "name": "piston-1.5in",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-1.5in.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-1.5in.stl",
   "note": "1.5 in full-bore piston Ø34.8 × 42 (the spool bore, exact), two 8 mm lands with 0.4 relief between, Ø3 wrist pin at 17.6 mm, open skirt"
  },
  {
   "name": "piston-1.5in-rod",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-rod.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-1.5in-rod.stl",
   "note": "1.5 in piston Ø34.8 as above with a Ø3 bore through the crown and a Ø11 × 6 boss under it: the Ø3 displacer rod runs through it (beta, rhombic, free-piston)"
  },
  {
   "name": "piston-2in",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-2in.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-2in.stl",
   "note": "2 in full-bore piston Ø47.5 × 56 (the spool bore, exact), two 8 mm lands with 0.4 relief between, Ø3 wrist pin at 23.5 mm, open skirt"
  },
  {
   "name": "piston-2in-rod",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-2in-rod.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-2in-rod.stl",
   "note": "2 in piston Ø47.5 as above with a Ø3 bore through the crown and a Ø11 × 6 boss under it: the Ø3 displacer rod runs through it (beta, rhombic, free-piston)"
  },
  {
   "name": "piston-3in",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-3in.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-3in.stl",
   "note": "3 in full-bore piston Ø72.9 × 88 (the spool bore, exact), two 8 mm lands with 0.4 relief between, Ø3 wrist pin at 37.0 mm, open skirt"
  },
  {
   "name": "piston-3in-rod",
   "step": "/files/hardware/tri-clamp-power-pistons/piston-3in-rod.step",
   "stl": "/files/hardware/tri-clamp-power-pistons/piston-3in-rod.stl",
   "note": "3 in piston Ø72.9 as above with a Ø3 bore through the crown and a Ø11 × 6 boss under it: the Ø3 displacer rod runs through it (beta, rhombic, free-piston)"
  }
 ]
}