{
 "object": "alpha-twin-crank-90",
 "license": "CC BY 4.0, Xem Studio",
 "les": "https://longearthsociety.com/engineering/",
 "files": [
  {
   "name": "crank-disc-2pin-90deg-e6",
   "step": "/files/hardware/alpha-twin-crank-90/crank-disc-2pin-90deg-e6.step",
   "stl": "/files/hardware/alpha-twin-crank-90/crank-disc-2pin-90deg-e6.stl",
   "note": "single crank disc with two \u00d83 pin holes 90\u00b0 apart at 6 mm (stroke 12): both alpha con-rods on one disc"
  },
  {
   "name": "crank-disc-2pin-90deg-e8",
   "step": "/files/hardware/alpha-twin-crank-90/crank-disc-2pin-90deg-e8.step",
   "stl": "/files/hardware/alpha-twin-crank-90/crank-disc-2pin-90deg-e8.stl",
   "note": "single crank disc with two \u00d83 pin holes 90\u00b0 apart at 8 mm (stroke 16): both alpha con-rods on one disc"
  },
  {
   "name": "crank-disc-2pin-90deg-e10",
   "step": "/files/hardware/alpha-twin-crank-90/crank-disc-2pin-90deg-e10.step",
   "stl": "/files/hardware/alpha-twin-crank-90/crank-disc-2pin-90deg-e10.stl",
   "note": "single crank disc with two \u00d83 pin holes 90\u00b0 apart at 10 mm (stroke 20): both alpha con-rods on one disc"
  },
  {
   "name": "v-block-90-2x-syringe-10ml",
   "step": "/files/hardware/alpha-twin-crank-90/v-block-90-2x-syringe-10ml.step",
   "stl": "/files/hardware/alpha-twin-crank-90/v-block-90-2x-syringe-10ml.stl",
   "note": "90\u00b0 V block for two 10 mL syringe barrels over one crank (alpha V-twin): bores meet 12 mm above the base"
  },
  {
   "name": "transfer-tee-4mm",
   "step": "/files/hardware/alpha-twin-crank-90/transfer-tee-4mm.step",
   "stl": "/files/hardware/alpha-twin-crank-90/transfer-tee-4mm.stl",
   "note": "4 mm transfer tee (hot cylinder \u2192 regenerator \u2192 cold cylinder)"
  }
 ]
}