{
  "revision": "R5 genuine CAD center slice of estimated fuselage envelope",
  "status": "USER-APPROVED GEOMETRY; completed 15 s preliminary external-flow run",
  "section_plane": "y=0 vertical longitudinal plane through nose, cabin and aft fuselage",
  "cad_coordinates": "X nose-to-tail, Y lateral, Z above ground; CAD and STEP mm; JSON m",
  "method": "Estimated symmetric loft from elliptical/oval transverse stations; native CAD plane intersection; 0.5 mm deflection sampling for vent-ready wall. Not camera-calibrated photogrammetry.",
  "stations_x_top_bottom_halfwidth_m": [
    [
      0.0,
      0.675,
      0.645,
      0.008
    ],
    [
      0.1,
      0.82,
      0.41,
      0.18
    ],
    [
      0.3,
      1.02,
      0.34,
      0.34
    ],
    [
      0.6,
      1.2,
      0.32,
      0.52
    ],
    [
      1.0,
      1.39,
      0.31,
      0.64
    ],
    [
      1.6,
      1.58,
      0.3,
      0.74
    ],
    [
      2.2,
      1.7,
      0.31,
      0.76
    ],
    [
      2.8,
      1.73,
      0.32,
      0.73
    ],
    [
      3.4,
      1.68,
      0.37,
      0.64
    ],
    [
      4.0,
      1.57,
      0.5,
      0.55
    ],
    [
      4.7,
      1.5,
      0.66,
      0.43
    ],
    [
      5.4,
      1.5,
      0.8,
      0.32
    ],
    [
      6.1,
      1.49,
      0.95,
      0.22
    ],
    [
      6.7,
      1.43,
      1.08,
      0.13
    ],
    [
      7.0,
      1.33,
      1.15,
      0.08
    ],
    [
      7.17,
      1.25,
      1.19,
      0.025
    ],
    [
      7.2,
      1.225,
      1.215,
      0.006
    ]
  ],
  "sources": {
    "side": {
      "file": "side_reference.jpg",
      "url": "https://www.stellantis.com/content/dam/stellantis-corporate/news/press-releases/2023/january/04-01-2023/Archer-Midnight-eVTOL-01.jpg"
    },
    "top_front": {
      "file": "top_reference.jpg",
      "url": "https://www.stellantis.com/content/dam/stellantis-corporate/news/press-releases/2023/january/04-01-2023/Archer-Midnight-eVTOL-02.jpg"
    },
    "front": {
      "file": "Archer-Midnight-Front-3quarter.jpg",
      "url": "https://www.stellantis.com/content/dam/stellantis-corporate/news/insights/preparing-for-takeoff/Archer-Midnight-Front-3quarter.jpg"
    },
    "rear": {
      "file": "Archer_Midnight_Rear_3quarter.jpg",
      "url": "https://www.stellantis.com/content/dam/stellantis-corporate/news/insights/preparing-for-takeoff/Archer_Midnight_Rear_3quarter.jpg"
    },
    "interior": {
      "file": "Archer_Midnight_Interior.jpg",
      "url": "https://www.stellantis.com/content/dam/stellantis-corporate/news/insights/preparing-for-takeoff/Archer_Midnight_Interior.jpg"
    }
  },
  "modeled_components": [
    "Main fuselage center envelope",
    "Assumed centered nose fairing"
  ],
  "excluded_from_center_slice": [
    "Off-center main landing gear fairings",
    "Outboard wing/rotor booms and nacelles",
    "V-tail arms projecting up and sideways"
  ],
  "wing_center": "Center attachment blended into estimated roof envelope; no side-view outboard wing-root bulge. Exact center airfoil attachment is unknown.",
  "body_outline_m": [
    [
      7.2,
      1.225
    ],
    [
      7.177612983762497,
      1.244297726530922
    ],
    [
      7.15058071209967,
      1.2631094741091442
    ],
    [
      7.118459187409442,
      1.2813147997943364
    ],
    [
      7.080042885987152,
      1.2992188322346432
    ],
    [
      7.0308995490318145,
      1.3186393336221311
    ],
    [
      6.943013826866327,
      1.3508804207053164
    ],
    [
      6.842681502182192,
      1.386623240034246
    ],
    [
      6.754921214322154,
      1.4147892061184086
    ],
    [
      6.680904315860009,
      1.4347491069531855
    ],
    [
      6.611237983772105,
      1.4497591136366046
    ],
    [
      6.536803943081524,
      1.4622081218083958
    ],
    [
      6.456051678010153,
      1.4721866762159177
    ],
    [
      6.3663518797683345,
      1.4798155134110929
    ],
    [
      6.262396016197982,
      1.4853149505597243
    ],
    [
      6.1291683869665325,
      1.4893156383959878
    ],
    [
      5.817309885790173,
      1.4961563384369942
    ],
    [
      5.535904323287045,
      1.4998247742369821
    ],
    [
      5.2927407918527924,
      1.4992574863148613
    ],
    [
      4.9763962451994255,
      1.4963538832956407
    ],
    [
      4.79502112527198,
      1.497567100770054
    ],
    [
      4.643954969221131,
      1.5021789501209006
    ],
    [
      4.503578254561524,
      1.5101916864327902
    ],
    [
      4.364525032681271,
      1.5217886861140506
    ],
    [
      4.226659772366181,
      1.536953376787303
    ],
    [
      4.089853209284048,
      1.5556780018825056
    ],
    [
      3.953981326614976,
      1.577950735950582
    ],
    [
      3.8050200854415737,
      1.605726070758234
    ],
    [
      3.5412417074242524,
      1.6562379837111008
    ],
    [
      3.401452772945199,
      1.6797774384697577
    ],
    [
      3.2798094668435103,
      1.6966102324135708
    ],
    [
      3.155937736895187,
      1.710113458784727
    ],
    [
      3.0293020583729873,
      1.7202988319997548
    ],
    [
      2.899621253886456,
      1.727121474422953
    ],
    [
      2.766575153386982,
      1.7305208974648603
    ],
    [
      2.632559288763938,
      1.7302751207250342
    ],
    [
      2.5051122357756945,
      1.7263138929488449
    ],
    [
      2.383203406559244,
      1.7188066231737071
    ],
    [
      2.2660685644374436,
      1.7078782844869058
    ],
    [
      2.1531164366671147,
      1.6936309063327217
    ],
    [
      2.039508260744175,
      1.6756698966406232
    ],
    [
      1.9179498280169223,
      1.6529022512162925
    ],
    [
      1.7857286963288184,
      1.6246065121041786
    ],
    [
      1.6379997658672976,
      1.5895056122560776
    ],
    [
      1.4654387877438133,
      1.5448340117100883
    ],
    [
      1.3273573521905242,
      1.5053618958362647
    ],
    [
      1.2061231973638855,
      1.466802149195213
    ],
    [
      1.096385590085864,
      1.4279063998425792
    ],
    [
      0.9954623484397395,
      1.388119758684664
    ],
    [
      0.9002976571293757,
      1.346774871625885
    ],
    [
      0.7927625522546959,
      1.2963804929444689
    ],
    [
      0.663771800429692,
      1.2324164547433694
    ],
    [
      0.5304305429306067,
      1.1641273948835644
    ],
    [
      0.44971823778132175,
      1.1199154804963425
    ],
    [
      0.3846914295175625,
      1.0802656175284961
    ],
    [
      0.32818673338790416,
      1.0413738405975652
    ],
    [
      0.27743213013996404,
      1.0017955161051864
    ],
    [
      0.2290054990052994,
      0.9593305434127609
    ],
    [
      0.18126770000673723,
      0.9126622571258973
    ],
    [
      0.13573470354486186,
      0.8630926630802057
    ],
    [
      0.09388304434563026,
      0.8121840438446203
    ],
    [
      0.05613107582685943,
      0.7610096576232666
    ],
    [
      0.01957117350852299,
      0.706634912280999
    ],
    [
      0.0006010161070919635,
      0.676020554666521
    ],
    [
      0.0,
      0.675
    ],
    [
      0.0,
      0.645
    ],
    [
      0.006866425027626307,
      0.5944120496828312
    ],
    [
      0.016113594238524313,
      0.5517852203421284
    ],
    [
      0.02598241668041437,
      0.5197759059780551
    ],
    [
      0.026504692127585164,
      0.5183250605415679
    ],
    [
      0.03953286134476036,
      0.48750739112221897
    ],
    [
      0.054345488762460675,
      0.4612630140285657
    ],
    [
      0.07102488938051535,
      0.4386697636295611
    ],
    [
      0.07502909640543665,
      0.4340369065685683
    ],
    [
      0.09444110880476839,
      0.4147432919458139
    ],
    [
      0.1045166910309458,
      0.4063521749334948
    ],
    [
      0.12921385409870972,
      0.3892361578728404
    ],
    [
      0.1497908653404202,
      0.37800540876065114
    ],
    [
      0.23999999999999969,
      0.15999999999999986
    ],
    [
      0.37,
      0.030000000000000006
    ],
    [
      0.5299999999999997,
      0.025000000000000057
    ],
    [
      0.6799999999999998,
      0.11999999999999976
    ],
    [
      0.8999999999999998,
      0.2299999999999999
    ],
    [
      0.9716868034643373,
      0.31064765399888644
    ],
    [
      1.000472210646133,
      0.30998907642975415
    ],
    [
      1.1899519557154792,
      0.305491205699389
    ],
    [
      1.3958208228657996,
      0.3014552796000685
    ],
    [
      1.5957217152227972,
      0.29999319168830396
    ],
    [
      1.6625904313699567,
      0.3002995211678054
    ],
    [
      1.863796453568087,
      0.3031871403969041
    ],
    [
      2.0283511913501693,
      0.306640041131963
    ],
    [
      2.1108140847670938,
      0.3083595411327358
    ],
    [
      2.2009035009484097,
      0.31001488192236565
    ],
    [
      2.419058246216185,
      0.3128612139234998
    ],
    [
      2.599787704113462,
      0.3153003069257941
    ],
    [
      2.7728549062536616,
      0.3191697501736679
    ],
    [
      2.863013630161977,
      0.32222814771500485
    ],
    [
      2.9530522696222,
      0.326282903703495
    ],
    [
      3.1011685649894836,
      0.335798970678932
    ],
    [
      3.1775987893666526,
      0.3424102447651935
    ],
    [
      3.2895637634467287,
      0.3546063175459461
    ],
    [
      3.341740919075262,
      0.3614327751357363
    ],
    [
      3.401313669353862,
      0.3702052069375428
    ],
    [
      3.509369364602801,
      0.3888215809057723
    ],
    [
      3.6297967821847346,
      0.4130275517884504
    ],
    [
      3.7587964203424686,
      0.4419207571950602
    ],
    [
      3.76508036200128,
      0.44338593373521556
    ],
    [
      3.9650762801390127,
      0.49149515566431684
    ],
    [
      4.024324964647601,
      0.5059073398487682
    ],
    [
      4.342104684798469,
      0.5812039686763606
    ],
    [
      4.468978456153653,
      0.6100054045811181
    ],
    [
      4.699058162414528,
      0.6598034244883099
    ],
    [
      4.758486235147117,
      0.6720889549158034
    ],
    [
      4.850974909940974,
      0.6906255188068356
    ],
    [
      4.949028870684343,
      0.7102576552809005
    ],
    [
      5.1227734410826855,
      0.7443498657587125
    ],
    [
      5.2566073423395405,
      0.7708247545709213
    ],
    [
      5.3978103442418295,
      0.7995453342269374
    ],
    [
      5.449806608908981,
      0.8104268833037764
    ],
    [
      5.6205961170806,
      0.8471160099858528
    ],
    [
      5.761709762287189,
      0.8779499256331383
    ],
    [
      6.0966036185898105,
      0.9493089690065755
    ],
    [
      6.178703768615626,
      0.9658027414834237
    ],
    [
      6.2608437992263095,
      0.9820900259054106
    ],
    [
      6.459872655013669,
      1.0227722862075732
    ],
    [
      6.528932153946602,
      1.037972186368326
    ],
    [
      6.632444743912446,
      1.0625208620830684
    ],
    [
      6.683958359690505,
      1.0757301222154265
    ],
    [
      6.742608651500008,
      1.091656326606729
    ],
    [
      6.85229684982544,
      1.1212825695205724
    ],
    [
      6.925547850873435,
      1.1380067705868624
    ],
    [
      6.947699662044926,
      1.1421957140612529
    ],
    [
      6.999439446334911,
      1.1499336176074253
    ],
    [
      7.051306358002352,
      1.1553430467893215
    ],
    [
      7.091859830452985,
      1.1610466375704895
    ],
    [
      7.129994171770457,
      1.1708327883036895
    ],
    [
      7.15545077414632,
      1.1816132047693642
    ],
    [
      7.177122021149379,
      1.1948514164608628
    ],
    [
      7.195580482020559,
      1.210451233333419
    ],
    [
      7.2,
      1.215
    ]
  ],
  "vent": {
    "center_m": [
      4.900001890312659,
      0.700441587043868
    ],
    "endpoints_m": [
      [
        4.850974909940974,
        0.6906255188068356
      ],
      [
        4.949028870684343,
        0.7102576552809005
      ]
    ],
    "slot_height_m": 0.1,
    "direction_deg": -35,
    "temperature_K": 873.15,
    "velocity_m_s": [
      32.76608177155967,
      -22.943057454041842
    ],
    "pulse_duration_s": 10,
    "basis": "Assumed centerline belly outlet; not known Archer pack/vent geometry"
  },
  "ground_clearance": {
    "minimum_wall_m": 0.025000000000000057,
    "center_nose_fairing_m": 0.025,
    "basis": "Gear width/placement and small clearance are unresolved assumptions; do not claim exact wheel-ground contact."
  },
  "scale_assumption": "Side display retains 8.2 m whole-aircraft projected nose-to-tail-tip reference; estimated fuselage itself is 7.2 m. Dimensions are not manufacturer measurements.",
  "domain_bounds_m": [
    -16.4,
    32.8,
    0,
    24.6
  ],
  "ambient": {
    "temperature_K": 298.15,
    "velocity_m_s": [
      0,
      0
    ],
    "gravity_m_s2": [
      0,
      -9.81
    ],
    "rotors": "stopped"
  },
  "confidence": "Visible nose/cabin and exposed belly guide the envelope. Roof under wing, belly behind near gear, widths and aft center skin require inference from multiple views.",
  "limits": [
    "Exact aircraft midsection cannot be recovered from oblique exterior images alone.",
    "This is a center cut of our approximate envelope, not an authenticated Archer CAD section.",
    "Battery packs and outlet layout are unverified.",
    "No existing R2 flow fields are a solution for R5."
  ],
  "approval": {
    "date": "2026-10-11",
    "user_message": "look perfect. use that."
  },
  "completed_case": "cfd/",
  "results_summary": "results/run_summary.json"
}