{
 "object": "propeller-blade-count",
 "license": "Xem Studio Design License (https://xemstudio.com/license/), Xem Studio",
 "files": [
  {
   "name": "propeller-blade-count-propeller",
   "step": "/files/hardware/propeller-blade-count/propeller-blade-count-propeller.step",
   "stl": "/files/hardware/propeller-blade-count/propeller-blade-count-propeller.stl",
   "note": "10.8×6 in propeller, 3 blades: each section set at the geometric pitch angle atan(P / 2πr); chord and section illustrative"
  }
 ]
}