{
  "revision": "04C",
  "status": "UNDERBODY_PACKAGING_STUDY_NOT_VALIDATED",
  "date": "2026-10-21",
  "body_mm": {
    "length": 450,
    "width": 250,
    "height_target": 140
  },
  "rotor_diameter_mm": 90,
  "module_outer_diameter_mm": 100,
  "centers_xy_mm": [
    [
      -145,
      -52
    ],
    [
      -145,
      52
    ],
    [
      145,
      -52
    ],
    [
      145,
      52
    ]
  ],
  "coordinate_system": "x longitudinal; y lateral; origin body center",
  "ground_clearance_target_mm": 30,
  "mass_ceiling_target_g": 1300,
  "battery_reference": "4S 2200mAh; selection and physical fit reopened",
  "hover_target_s": 60,
  "validated_hover_s": null,
  "airflow": "Black front/rear lower bumper and black side-skirt inlets -> internal curved ducts -> underbody rotors -> downward outlets",
  "rear_boost": "Ground-only optional module; packaging and mass unresolved; not represented as installed",
  "budget_status": "Old 1220g allocation + 80g reserve archived; new allocation not closed",
  "screening": {
    "disk_area_m2": 0.025446900494077322,
    "ideal_open_rotor_hover_power_W": 182.30372970198133,
    "ideal_power_ratio_vs_153_07mm": 1.700777777777778,
    "roll_arm_ratio_vs_215mm": 0.24186046511627907,
    "same_row_module_outer_gap_mm": 4,
    "note": "Ideal isolated open-rotor momentum theory at 1.3kg and rho=1.225. Not ducted fan power, electrical power, installed thrust or endurance prediction."
  },
  "white_body_constraint": "No openings in white hood, doors, fenders or upper rear deck",
  "inlet_free_area_mm2": null,
  "duct_pressure_loss_pa": null
}