{
  "physical_measurements": 0,
  "revision": "P3.7",
  "model_mass_kg": 2587.036,
  "mass_change_from_P36_kg": 122.68430188679258,
  "base_P36_mass_kg": 2464.3516981132075,
  "mass_changes_kg": {
    "replace_199.351698kg_pack_with_207.036kg_target": 7.68430188679244,
    "seal_carrier_allowance": 35.0,
    "floor_structure_allowance": 15.0,
    "spring_and_mount_allowance": 5.0,
    "fan_bank_increase_from_6_to_15_equivalent_units": 60.0
  },
  "wheel_brake_suspension_inputs": {
    "revision": "P3.6 rotating-wheel, hydraulic and suspension model",
    "physical_measurements": 0,
    "wheel_radius_m": [
      0.34,
      0.34,
      0.355,
      0.355
    ],
    "wheel_rotational_inertia_kgm2": [
      2.5,
      2.5,
      3.0,
      3.0
    ],
    "magic_formula_B": 12.0,
    "magic_formula_C": 1.9,
    "magic_formula_E": 0.97,
    "slip_denominator_floor_ms": 0.5,
    "brake_pressure_max_Pa": 16000000.0,
    "caliper_effective_piston_area_m2": [
      0.0048,
      0.0048,
      0.0032,
      0.0032
    ],
    "pad_friction_at_reference": 0.4,
    "effective_disc_radius_m": [
      0.17,
      0.17,
      0.155,
      0.155
    ],
    "pressure_rise_time_constant_s": 0.018,
    "pressure_dump_time_constant_s": 0.009,
    "pressure_rise_limit_Pa_s": 350000000.0,
    "pressure_dump_limit_Pa_s": 700000000.0,
    "caliper_compliance_m3_Pa": 5e-14,
    "hydraulic_pump_efficiency": 0.7,
    "hydraulic_pump_DC_limit_W": 3000.0,
    "wheel_sensor_delay_s": 0.008,
    "ABS_period_s": 0.005,
    "wheel_force_observer_tau_s": 0.03,
    "initial_slip_target": 0.12,
    "ABS_pressure_Kp_Pa": 24000000.0,
    "ABS_pressure_Ki_Pa_s": 120000000.0,
    "rotor_thermal_mass_kg": [
      12.0,
      12.0,
      10.0,
      10.0
    ],
    "rotor_heat_capacity_J_kgK": 750.0,
    "rotor_heat_fraction": 0.9,
    "rotor_cooling_area_m2": [
      0.32,
      0.32,
      0.28,
      0.28
    ],
    "rotor_convection_static_W_m2K": 12.0,
    "rotor_convection_velocity_coefficient": 8.0,
    "rotor_emissivity": 0.8,
    "fade_start_C": 550.0,
    "fade_end_C": 850.0,
    "fade_end_torque_fraction": 0.7,
    "initial_rotor_C": 100.0,
    "ambient_C": 20.0,
    "unsprung_mass_kg_each": 55.0,
    "suspension_spring_N_m": [
      140000.0,
      140000.0,
      175000.0,
      175000.0
    ],
    "suspension_damper_N_s_m": [
      8000.0,
      8000.0,
      8000.0,
      8000.0
    ],
    "suspension_travel_limit_m": 0.1,
    "pitch_radius_of_gyration_m": 1.05,
    "roll_radius_of_gyration_m": 0.65,
    "brake_mechanical_power_design_limit_W": 3000000.0,
    "front_brake_mechanical_power_design_limit_W": 2000000.0,
    "rear_brake_mechanical_power_design_limit_W": 1300000.0,
    "wheel_regen_torque_time_constant_s": 0.01,
    "air_trim_unmet_yaw_threshold_Nm": 600.0,
    "classification": "Empirical target law common to launch and braking, not a measured tyre.",
    "limits": [
      "The longitudinal Magic Formula is empirical and needs measured force/slip data. It does not identify a tyre compound.",
      "Effective dry grip remains the earlier calibrated parameter; it is not independent evidence of production-car superiority.",
      "Pressure, encoder, IMU and suspension observations use stated delays and assumed mappings. No road-grip truth is supplied to the controller.",
      "Heave, pitch and roll use a linear three-coordinate sprung-body model with passive spring/damper loads and no unsprung vertical dynamics.",
      "Brake temperature is a lumped rotor screen. Thermal stress, cracks, pad wear and measured fade are not resolved.",
      "Full installed flow, surrounding body pressure and fan maps remain unvalidated; the cold branch receives no driving credit."
    ],
    "common_peak_parameter": 0.9399025624505065,
    "load_sensitivity_exponent": 0.15
  },
  "external_drag_area_m2_target": 0.57,
  "fan_bank": {
    "series_stages": 5,
    "parallel_branches": 3,
    "equivalent_unit_count": 15,
    "mass_target_kg": 100.0,
    "launch_force_target_N": 25000.0,
    "launch_effective_gap_m_target": 0.003,
    "classification": "Scaled pressure/flow design envelope, not selected or measured full-size fans."
  },
  "pack": {
    "series_cells": 216,
    "parallel_cells": 10,
    "pack_mass_target_kg": 207.036,
    "chemical_window_initial_J": 10000000.0,
    "chemical_remaining_J": 2092367.0681102641,
    "DC_exchange_window_initial_J": 8000000.0,
    "DC_exchange_window_remaining_J": 1694176.6553963674,
    "node_net_work_J": 6305823.344602058,
    "cell_Joule_heat_J": 1406672.7503837517,
    "converter_loss_heat_J": 195136.83690160594,
    "cell_temperature_C": 35.19150836362256,
    "maximum_cell_current_A": 34.46200692653388,
    "minimum_cell_voltage_V": 3.0107598614693227,
    "maximum_cell_voltage_V": 3.728481536423875,
    "energy_residual_J": 1.2309790978909385e-07,
    "OCV_nominal_V_assumed": 3.7,
    "OCV_window_V_target": [
      3.4,
      4.0
    ],
    "DC_resistance_ohm_upper_target": 0.02,
    "classification": "Finite cell/pack requirements model. Electrical property windows and assembled mass remain unmeasured targets."
  },
  "electrical_limits": {
    "shared_gross_DC_W": 217391.30434782608,
    "chemical_operating_window_J": 10000000.0,
    "DC_exchange_ceiling_J": 8000000.0,
    "auxiliary_initial_J": 200000.0,
    "control_W": 1000.0,
    "protected_DC_control_reserve_J": 100000.0,
    "chemical_to_available_DC_guard_factor": 0.75
  },
  "cold_hardware": "Separate branch; its mass and energy are not installed in these driving results.",
  "cold_driving_energy_credit_J": 0,
  "controller": {
    "slip_target": 0.12,
    "kp": 24000000.0,
    "ki": 120000000.0,
    "steer_scale": 1.0,
    "air_trim": true,
    "observer_tau": 0.015,
    "power_reserve": 0.94,
    "brake_gain_bound": 1.15,
    "pulse_control_reserve_J": 100000.0,
    "fan_reserve_horizon_s": 3.0,
    "actuator_scale": 1.0,
    "sensor_bias_ms": 0.0,
    "grip_scale": 1.0,
    "tyre_B": 12.0,
    "initial_temp_C": 100.0,
    "brake_torque_scale": 1.0,
    "inertial_feedforward": 0.5,
    "grip_filter_tau_s": 0.04,
    "grip_recovery_tau_s": 0.15
  },
  "fitted_engine_power_note": "Same earlier fitted effective wheel-power envelope in all four modes. Not a calibrated Chiron launch/shift/telemetry surrogate. Engine mechanical work is an explicit input; fuel consumption is not qualified."
}