{
 "object": "pitch-diameter-ratio",
 "license": "Xem Studio Design License (https://xemstudio.com/license/), Xem Studio",
 "files": [
  {
   "name": "pitch-diameter-ratio-propeller",
   "step": "/files/hardware/pitch-diameter-ratio/pitch-diameter-ratio-propeller.step",
   "stl": "/files/hardware/pitch-diameter-ratio/pitch-diameter-ratio-propeller.stl",
   "note": "13×4 in propeller, 2 blades: each section set at the geometric pitch angle atan(P / 2πr); chord and section illustrative"
  }
 ]
}