{
 "meta": {
  "tool": "DirtSim Late Model",
  "schema": 4,
  "name": "Owner's car: real springs, shocks, weights on the Blender V49 geometry (V25 measured alignment, V41 rack, V31/V32 rear)",
  "units": "in, lb, deg, lb/in",
  "datum": "X = 0 at rack centre (+ rearward), Y = 0 at rack centre (+ right), Z = 0 ground. Rear parts relative to the axle tube centre with the car at static, car axes.",
  "source": "tools/frontgeo_baseline_from_blender.py from data/vehicle/blender_v128 (owner's Blender model, estimated geometry); setup from data/vehicle/owner_setup.yaml (owner, 2026-11-08 / 11-10)",
  "known_issues": [
   "Geometry is the Blender model (estimated, photo-guided), not a chassis measure.",
   "Static is solved from the rater springs and rough weights: ride heights and corner split are outputs."
  ],
  "placeholders": [
   "tyre model coefficients (pressure, lateral, crown)",
   "front brake %",
   "chassis height measurement points",
   "LCA pivot bolt spacing (model only defines the axis)",
   "UCA cross-shaft end spacing (model only defines the axis)",
   "rear ride-height points",
   "RR droop chain (mirrored from LR, off)",
   "brake bias",
   "LR front shock (damper only)",
   "chain and 6th-coil mounts are Blender illustrative mounts (V32)",
   "unsprung weights are the owner's estimate",
   "CG height ~ cam height (estimated from the Blender engine)"
  ],
  "datum_shift_in": [
   105.1938,
   -4.7819,
   0.0
  ]
 },
 "chassis": {
  "ref_heights": {
   "LF": 6.5,
   "RF": 6.5,
   "LR": 5.0,
   "RR": 5.0
  },
  "height_points": {
   "LF": [
    9.194,
    -24.782,
    6.5
   ],
   "RF": [
    9.194,
    15.218,
    6.5
   ],
   "LR": [
    113.194,
    -24.782,
    5.0
   ],
   "RR": [
    113.194,
    15.218,
    5.0
   ]
  },
  "rack": {
   "height": 9.835,
   "width": 18.761,
   "high_low_spacing": 1.898,
   "ratio_in_per_rev": 4.25
  },
  "LF": {
   "lca_front": [
    -10.178,
    -11.636,
    11.525
   ],
   "lca_rear": [
    4.764,
    -12.776,
    10.876
   ],
   "uca_shaft_front": [
    -3.716,
    -17.69,
    16.338
   ],
   "uca_shaft_rear": [
    5.276,
    -17.689,
    15.95
   ],
   "shock_upper": [
    0.836,
    -19.182,
    26.157
   ]
  },
  "RF": {
   "lca_front": [
    -11.453,
    10.614,
    9.335
   ],
   "lca_rear": [
    3.533,
    10.615,
    8.69
   ],
   "uca_shaft_front": [
    -2.949,
    14.993,
    19.829
   ],
   "uca_shaft_rear": [
    6.043,
    14.994,
    19.442
   ],
   "shock_upper": [
    3.532,
    18.307,
    28.243
   ]
  },
  "rear": {
   "L_upper_plate": [
    88.464,
    -27.878,
    25.684
   ],
   "L_lower_plate": [
    90.161,
    -27.799,
    10.962
   ],
   "R_upper_plate": [
    88.757,
    17.319,
    25.829
   ],
   "R_lower_plate": [
    90.23,
    17.397,
    11.201
   ],
   "jbar_hanger": [
    95.994,
    -18.983,
    16.629
   ],
   "fifth_coil_upper": [
    68.191,
    1.707,
    25.754
   ],
   "sixth_coil_chassis": [
    64.191,
    1.95,
    26.009
   ],
   "LR_rear_coilover_upper": [
    111.598,
    -19.971,
    24.641
   ],
   "LR_front_shock_upper": [
    102.489,
    -21.804,
    31.784
   ],
   "RR_coilover_upper": [
    99.897,
    10.095,
    27.813
   ],
   "LR_chain_chassis": [
    98.722,
    -18.244,
    28.868
   ],
   "RR_chain_chassis": [
    98.722,
    18.244,
    28.868
   ]
  }
 },
 "parts": {
  "LF": {
   "lca": {
    "length": 17.311,
    "offset": -4.5,
    "bj_height": 0.0,
    "shock_dist": 13.184,
    "shock_offset": -3.519,
    "shock_height": 1.143
   },
   "uca": {
    "length": 13.538,
    "offset": -0.0,
    "bj_height": 0.0
   },
   "spindle": {
    "height": 10.81,
    "kpi": 6.0,
    "drop": 3.95,
    "pin_offset": -0.0,
    "hub_face": 4.634,
    "arm_length": 5.099,
    "ackermann": 2.445,
    "arm_height": 1.413
   },
   "tie_rod": {
    "length": 18.819
   }
  },
  "RF": {
   "lca": {
    "length": 16.61,
    "offset": -4.5,
    "bj_height": 0.0,
    "shock_dist": 12.566,
    "shock_offset": -3.838,
    "shock_height": 1.137
   },
   "uca": {
    "length": 10.001,
    "offset": 0.0,
    "bj_height": 0.0
   },
   "spindle": {
    "height": 10.542,
    "kpi": 6.0,
    "drop": 3.949,
    "pin_offset": -0.0,
    "hub_face": 4.634,
    "arm_length": 5.184,
    "ackermann": 1.124,
    "arm_height": 1.223
   },
   "tie_rod": {
    "length": 17.177
   }
  },
  "rear": {
   "axle": {
    "frame": "tube-aligned: Y along the tube (left to right), X rearward, Z up; origin at the tube centre",
    "centre_static": [
     105.191,
     -4.473,
     14.476
    ],
    "tube_direction_static": [
     4e-06,
     0.999986,
     0.005357
    ],
    "cage_y": {
     "L": -23.288,
     "R": 23.288
    },
    "wheel_centre": {
     "L": [
      -0.0,
      -33.812,
      -0.0
     ],
     "R": [
      0.0,
      33.312,
      -0.0
     ]
    },
    "hub_face": {
     "L": -31.812,
     "R": 31.312
    },
    "jbar_stud": [
     -9.592,
     5.293,
     -4.779
    ],
    "pinion_angle_static": -6.0,
    "front_shock_lower": [
     -2.811,
     -17.238,
     -1.5
    ],
    "cg": [
     -2.0,
     -3.606,
     0.0
    ],
    "weight": 200.0
   },
   "lift_arm": {
    "nose": [
     -38.0,
     6.148,
     -5.726
    ],
    "sixth_point": [
     -41.0,
     6.392,
     -5.728
    ],
    "pivot_upper": [
     -3.9,
     2.8,
     5.5
    ],
    "pivot_lower": [
     -4.4,
     2.9,
     -5.1
    ]
   },
   "chain_anchor": {
    "LR": [
     0.093,
     -10.624,
     2.163
    ],
    "RR": [
     0.093,
     10.147,
     2.052
    ]
   },
   "birdcage": {
    "L": {
     "clamped": false,
     "upper_bar": [
      0.194,
      4.496
     ],
     "lower_bar": [
      -0.258,
      -5.994
     ],
     "coilover_lower": [
      4.998,
      1.575,
      -6.914
     ]
    },
    "R": {
     "clamped": false,
     "upper_bar": [
      0.194,
      4.496
     ],
     "lower_bar": [
      -0.259,
      -5.994
     ],
     "coilover_lower": [
      -5.808,
      -1.575,
      -5.463
     ]
    }
   },
   "links": {
    "L_upper": 18.25,
    "L_lower": 15.0,
    "R_upper": 18.0,
    "R_lower": 15.0,
    "jbar": 21.0
   }
  }
 },
 "setup": {
  "toe_mode": "tie_rods",
  "toe_target_total_in": -0.125,
  "toe_split": 0.5,
  "rack_hole": {
   "LF": "high",
   "RF": "low"
  },
  "LF": {
   "camber_spacer_front": 0.0,
   "camber_spacer_rear": 0.0,
   "caster_slug": 0.0,
   "antidive_front": 0.0,
   "antidive_rear": 0.0,
   "bump_spacer": 0.0,
   "wheel": {
    "width": 14.0,
    "backspacing": 5.0,
    "spacer": 0.0
   },
   "tire": {
    "rollout": 88.0,
    "radius_mode": "model",
    "fixed_radius": 13.406,
    "pressure": 10.0,
    "ref_pressure": 10.0,
    "rate": 800.0,
    "rate_per_psi": 40.0,
    "growth_per_psi": 0.0,
    "lat_rate": 900.0,
    "lat_drop": 0.15,
    "crown_radius": 10.0
   },
   "unsprung": 40.0,
   "spring": {
    "stacked": false,
    "rate": 525,
    "free_length": 10,
    "load_mode": "smash",
    "smash": [
     {
      "eye": 14.0,
      "load": 1394.0
     },
     {
      "eye": 14.125,
      "load": 1325.0
     },
     {
      "eye": 14.25,
      "load": 1260.0
     },
     {
      "eye": 14.375,
      "load": 1191.0
     },
     {
      "eye": 14.5,
      "load": 1123.0
     },
     {
      "eye": 14.625,
      "load": 1057.0
     },
     {
      "eye": 14.75,
      "load": 987.0
     },
     {
      "eye": 14.875,
      "load": 919.0
     },
     {
      "eye": 15.0,
      "load": 850.0
     },
     {
      "eye": 15.125,
      "load": 782.0
     },
     {
      "eye": 15.25,
      "load": 716.0
     },
     {
      "eye": 15.375,
      "load": 648.0
     },
     {
      "eye": 15.5,
      "load": 580.0
     },
     {
      "eye": 15.625,
      "load": 514.0
     },
     {
      "eye": 15.75,
      "load": 446.0
     },
     {
      "eye": 15.875,
      "load": 379.0
     },
     {
      "eye": 16.0,
      "load": 311.0
     },
     {
      "eye": 16.125,
      "load": 244.0
     },
     {
      "eye": 16.25,
      "load": 178.0
     },
     {
      "eye": 16.375,
      "load": 112.0
     },
     {
      "eye": 16.5,
      "load": 49.0
     }
    ],
    "table_includes": [
     "gas"
    ],
    "bump_rate": 0.0,
    "bump_gap": 2.0,
    "source": "spring rater: data/raw/shock_spring_2025/LH LF.SPR3",
    "described": {
     "stacked": false,
     "rate": 525,
     "free_length": 10,
     "load_mode": "smash",
     "smash": [
      {
       "eye": 16.0,
       "load": 340.0
      }
     ],
     "bump_rate": 0.0,
     "bump_gap": 2.0,
     "wheel_load": null,
     "stack_height": null
    },
    "wheel_load": null,
    "stack_height": null
   },
   "shock": {
    "min_len": 12.78,
    "max_len": 17.9,
    "gas_psi": 100,
    "shaft_dia": 0.5,
    "part": "33-334066",
    "bump_stop": {
     "type": "none",
     "free_height": 2.25,
     "packer": 0.0
    },
    "droop_limit": "LF chain (eye 17.90 in, from the AiM log)"
   }
  },
  "RF": {
   "camber_spacer_front": 0.0,
   "camber_spacer_rear": 0.0,
   "caster_slug": 0.0,
   "antidive_front": 0.0,
   "antidive_rear": 0.0,
   "bump_spacer": 0.0,
   "wheel": {
    "width": 14.0,
    "backspacing": 5.0,
    "spacer": 0.0
   },
   "tire": {
    "rollout": 89.0,
    "radius_mode": "model",
    "fixed_radius": 13.565,
    "pressure": 10.0,
    "ref_pressure": 10.0,
    "rate": 800.0,
    "rate_per_psi": 40.0,
    "growth_per_psi": 0.0,
    "lat_rate": 900.0,
    "lat_drop": 0.15,
    "crown_radius": 10.0
   },
   "unsprung": 40.0,
   "spring": {
    "stacked": false,
    "rate": 150,
    "free_length": 10,
    "load_mode": "smash",
    "smash": [
     {
      "eye": 13.75,
      "load": 2969.0
     },
     {
      "eye": 13.875,
      "load": 2466.0
     },
     {
      "eye": 14.0,
      "load": 2112.0
     },
     {
      "eye": 14.125,
      "load": 1875.0
     },
     {
      "eye": 14.25,
      "load": 1709.0
     },
     {
      "eye": 14.375,
      "load": 1561.0
     },
     {
      "eye": 14.5,
      "load": 1490.0
     },
     {
      "eye": 14.625,
      "load": 1422.0
     },
     {
      "eye": 14.75,
      "load": 1353.0
     },
     {
      "eye": 14.875,
      "load": 1286.0
     },
     {
      "eye": 15.0,
      "load": 1218.0
     },
     {
      "eye": 15.125,
      "load": 1150.0
     },
     {
      "eye": 15.25,
      "load": 1083.0
     },
     {
      "eye": 15.375,
      "load": 1044.0
     },
     {
      "eye": 15.5,
      "load": 1029.0
     },
     {
      "eye": 15.625,
      "load": 1014.0
     },
     {
      "eye": 15.75,
      "load": 997.0
     },
     {
      "eye": 15.875,
      "load": 982.0
     },
     {
      "eye": 16.0,
      "load": 966.0
     },
     {
      "eye": 16.125,
      "load": 950.0
     },
     {
      "eye": 16.25,
      "load": 935.0
     },
     {
      "eye": 16.375,
      "load": 919.0
     },
     {
      "eye": 16.5,
      "load": 903.0
     },
     {
      "eye": 16.625,
      "load": 887.0
     },
     {
      "eye": 16.75,
      "load": 870.0
     },
     {
      "eye": 16.875,
      "load": 854.0
     },
     {
      "eye": 17.0,
      "load": 838.0
     },
     {
      "eye": 17.125,
      "load": 822.0
     },
     {
      "eye": 17.25,
      "load": 806.0
     },
     {
      "eye": 17.375,
      "load": 791.0
     },
     {
      "eye": 17.5,
      "load": 775.0
     },
     {
      "eye": 17.625,
      "load": 759.0
     },
     {
      "eye": 17.75,
      "load": 743.0
     },
     {
      "eye": 17.875,
      "load": 727.0
     },
     {
      "eye": 18.0,
      "load": 711.0
     },
     {
      "eye": 18.125,
      "load": 695.0
     },
     {
      "eye": 18.25,
      "load": 680.0
     },
     {
      "eye": 18.375,
      "load": 664.0
     },
     {
      "eye": 18.5,
      "load": 649.0
     },
     {
      "eye": 18.625,
      "load": 633.0
     }
    ],
    "table_includes": [
     "gas",
     "bump"
    ],
    "bump_rate": 0.0,
    "bump_gap": 2.0,
    "source": "spring rater: data/raw/shock_spring_2025/LH RF.SPR3",
    "described": {
     "stacked": true,
     "rate": 150,
     "free_length": 10,
     "rate2": 500,
     "free_length2": 8,
     "lockout": "above",
     "lockout_gap": null,
     "load_mode": "smash",
     "smash": [
      {
       "eye": 18.0,
       "load": 660.0
      },
      {
       "eye": 15.0,
       "load": 1150.0
      },
      {
       "eye": 13.5,
       "load": 3000.0
      }
     ],
     "bump_rate": 0.0,
     "bump_gap": 2.0,
     "wheel_load": null,
     "stack_height": null
    },
    "wheel_load": null,
    "stack_height": null
   },
   "shock": {
    "min_len": 12.71,
    "max_len": 19.29,
    "gas_psi": 50,
    "shaft_dia": 0.5,
    "part": "33-311579",
    "bump_stop": {
     "type": "BR-47",
     "free_height": 2.25,
     "packer": 0
    }
   }
  },
  "rear": {
   "springs": {
    "LR": {
     "stacked": false,
     "rate": 100,
     "free_length": 10,
     "load_mode": "smash",
     "smash": [
      {
       "eye": 19.125,
       "load": 810.0
      },
      {
       "eye": 19.25,
       "load": 795.0
      },
      {
       "eye": 19.375,
       "load": 779.0
      },
      {
       "eye": 19.5,
       "load": 763.0
      },
      {
       "eye": 19.625,
       "load": 748.0
      },
      {
       "eye": 19.75,
       "load": 732.0
      },
      {
       "eye": 19.875,
       "load": 716.0
      },
      {
       "eye": 20.0,
       "load": 701.0
      },
      {
       "eye": 20.125,
       "load": 685.0
      },
      {
       "eye": 20.25,
       "load": 669.0
      },
      {
       "eye": 20.375,
       "load": 654.0
      },
      {
       "eye": 20.5,
       "load": 638.0
      },
      {
       "eye": 20.625,
       "load": 622.0
      },
      {
       "eye": 20.75,
       "load": 607.0
      },
      {
       "eye": 20.875,
       "load": 590.0
      },
      {
       "eye": 21.0,
       "load": 575.0
      },
      {
       "eye": 21.125,
       "load": 561.0
      },
      {
       "eye": 21.25,
       "load": 547.0
      },
      {
       "eye": 21.375,
       "load": 531.0
      },
      {
       "eye": 21.5,
       "load": 516.0
      },
      {
       "eye": 21.625,
       "load": 498.0
      },
      {
       "eye": 21.75,
       "load": 481.0
      },
      {
       "eye": 21.875,
       "load": 465.0
      },
      {
       "eye": 22.0,
       "load": 448.0
      },
      {
       "eye": 22.125,
       "load": 433.0
      },
      {
       "eye": 22.25,
       "load": 416.0
      },
      {
       "eye": 22.375,
       "load": 401.0
      },
      {
       "eye": 22.5,
       "load": 385.0
      },
      {
       "eye": 22.625,
       "load": 369.0
      },
      {
       "eye": 22.75,
       "load": 353.0
      },
      {
       "eye": 22.875,
       "load": 337.0
      },
      {
       "eye": 23.0,
       "load": 320.0
      },
      {
       "eye": 23.125,
       "load": 305.0
      },
      {
       "eye": 23.25,
       "load": 288.0
      },
      {
       "eye": 23.375,
       "load": 272.0
      },
      {
       "eye": 23.5,
       "load": 257.0
      },
      {
       "eye": 23.625,
       "load": 241.0
      },
      {
       "eye": 23.75,
       "load": 225.0
      },
      {
       "eye": 23.875,
       "load": 208.0
      },
      {
       "eye": 24.0,
       "load": 193.0
      },
      {
       "eye": 24.125,
       "load": 176.0
      },
      {
       "eye": 24.25,
       "load": 160.0
      },
      {
       "eye": 24.375,
       "load": 144.0
      },
      {
       "eye": 24.5,
       "load": 128.0
      },
      {
       "eye": 24.625,
       "load": 113.0
      },
      {
       "eye": 24.75,
       "load": 97.0
      },
      {
       "eye": 24.875,
       "load": 81.0
      },
      {
       "eye": 25.0,
       "load": 66.0
      },
      {
       "eye": 25.125,
       "load": 51.0
      },
      {
       "eye": 25.25,
       "load": 38.0
      }
     ],
     "table_includes": [
      "gas"
     ],
     "bump_rate": 0.0,
     "bump_gap": 2.0,
     "source": "spring rater: data/raw/shock_spring_2025/LH LRB.SPR3",
     "described": {
      "stacked": true,
      "rate": 100,
      "free_length": 10,
      "rate2": 150,
      "free_length2": 12,
      "lockout": "below",
      "lockout_gap": null,
      "load_mode": "smash",
      "smash": [
       {
        "eye": 18.0,
        "load": 750.0
       },
       {
        "eye": 24.0,
        "load": 200.0
       }
      ],
      "bump_rate": 0.0,
      "bump_gap": 2.0
     },
     "table_shift_in": 0.03
    },
    "RR": {
     "stacked": false,
     "rate": 250,
     "free_length": 10,
     "load_mode": "smash",
     "smash": [
      {
       "eye": 16.5,
       "load": 1629.0
      },
      {
       "eye": 16.625,
       "load": 1547.0
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      {
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      {
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      {
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      {
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      {
       "eye": 18.875,
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      {
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      {
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      {
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      {
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      {
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      {
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      {
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     "table_anchor": "static_preload",
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   },
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     "droop_limit": "underslung frame contact (eye 23.50 in, owner / Blender V31)"
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    "spacer": 0.0
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   "tire": {
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    "growth_per_psi": 0.0,
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    "lat_drop": 0.15,
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  },
  "RR": {
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   "tire": {
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      "compression_lb": [
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     "compression_lb": [
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     "rebound_lb": [
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     "dyno_file": "VG RF LSC15 HSC2 OJ10 50psi.dctw",
     "lag": {
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      "valve_velocity_in_s": [
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      "compression_lb": [
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      "rebound_lb": [
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    "fshock": {
     "compression_lb": [
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     "rebound_lb": [
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     "dyno_file": "C_Bumgardner BIL LRA OJ-12 lsc7 hsc3 125psi 012625_Original.dctw",
     "lag": {
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      "compression_lb": [
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      "rebound_lb": [
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    },
    "LR": {
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