{
  "basis": "Declared commissioning envelope for a reference 4.2 mm drilling operation; loads, friction and material values are assumptions, not measurements.",
  "seed": 42017,
  "operators": 3,
  "cycles_per_operator": 10,
  "screw_diameter_mm": 6,
  "torque_Nm": [
    2.8,
    3.0,
    3.2
  ],
  "nut_factor": [
    0.18,
    0.25
  ],
  "heel_y_mm": 54,
  "screw_y_mm": 50,
  "toe_y_mm": 39,
  "toe_width_mm": 20,
  "toe_thickness_mm": 4,
  "clamp_yield_MPa": 250,
  "minimum_clamp_friction": 0.12,
  "normal_drill_torque_Nm": 0.6,
  "normal_lateral_force_N": 40,
  "maximum_pullup_N": 150,
  "maximum_downthrust_N": 350,
  "friction_lever_arm_mm": 50,
  "design_factor": 2,
  "stress_factor": 1.5,
  "worn_bushing_additional_radial_mm": 0.025,
  "steel_E_MPa": 200000,
  "steel_poisson": 0.3,
  "aluminum_E_MPa": 69000,
  "aluminum_poisson": 0.33,
  "steel_expansion_per_K": 1.2e-05,
  "aluminum_expansion_per_K": 2.3e-05,
  "bushing_engagement_mm": 8,
  "equivalent_host_outer_radius_mm": 10,
  "bushing_interface_friction": 0.1,
  "bushing_interference_mm": [
    0.002,
    0.018
  ],
  "temperature_C": [
    10,
    20,
    35,
    60
  ],
  "retainer": {
    "span_mm": 21,
    "width_mm": 14,
    "thickness_mm": 3,
    "flange_diameter_mm": 14,
    "stem_diameter_mm": 10,
    "screw_tensile_area_mm2": 5.03,
    "screw_proof_MPa": 580,
    "thread_pitch_diameter_mm": 2.5,
    "thread_engagement_mm": 5,
    "aluminum_thread_shear_allowable_MPa": 50,
    "flange_bearing_allowable_MPa": 60,
    "seating_torque_Nm": [
      0.22,
      0.28
    ],
    "nut_factor": [
      0.18,
      0.25
    ],
    "drill_clearance_diameter_mm": 4.5
  }
}