{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "rear-wing-placement",
 "name": "Rear wing placement (height and fore-aft)",
 "kind": "standard",
 "category": "Car design",
 "group": "Car aero",
 "year": null,
 "question": "Where should a rear wing be mounted on a car?",
 "tags": [
  "vehicle design",
  "car aero",
  "rc design",
  "aerodynamics"
 ],
 "aliases": [
  "rear wing placement",
  "wing height",
  "wing mounting position",
  "where to mount a rear wing",
  "wing above roofline",
  "wing in clean air",
  "wing position aero balance",
  "rear wing location",
  "time attack wing position"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/rear-wing-placement/",
 "sheet_txt": "https://xemstudio.com/objects/rear-wing-placement/sheet.txt",
 "sheet": {
  "basis": "Design rules and figures from the cited sources; example geometry by Xem Studio",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "HPA's starting point is to put the forward third of the wing over the boot and the rear two-thirds behind it, with the leading edge level with the roofline seen from the front.",
   "Higher and further rearward gives more rear aero balance; lower positions interact with the body and floor but too low puts the wing in the cabin wake and performance drops substantially (HPA).",
   "RC classes constrain this by rule: touring-car wings must stay below the roofline (AARCMCC).",
   "The file is a reference example built by Xem Studio from the numbers above (Reference wing as in single-element entry.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle."
  ],
  "table": {
   "columns": [
    "parameter",
    "value or range",
    "source"
   ],
   "rows": [
    [
     "Fore-aft starting point",
     "front 1/3 over boot, rear 2/3 behind",
     "HPA rear wing"
    ],
    [
     "Height starting point",
     "leading edge level with roofline (front view)",
     "HPA rear wing"
    ],
    [
     "RC touring car wing height",
     "must be lower than the roof line",
     "AARCMCC"
    ],
    [
     "RC touring car rear overhang",
     "max 10 mm beyond body incl. bumper",
     "AARCMCC"
    ]
   ]
  }
 },
 "sheet_text": "Rear wing placement (height and fore-aft) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/rear-wing-placement/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)\nBasis: Design rules and figures from the cited sources; example geometry by Xem Studio\nCatalog version: 2026-10-20\n\nSizes: see table below\n- HPA's starting point is to put the forward third of the wing over the boot and the rear two-thirds behind it, with the leading edge level with the roofline seen from the front.\n- Higher and further rearward gives more rear aero balance; lower positions interact with the body and floor but too low puts the wing in the cabin wake and performance drops substantially (HPA).\n- RC classes constrain this by rule: touring-car wings must stay below the roofline (AARCMCC).\n- The file is a reference example built by Xem Studio from the numbers above (Reference wing as in single-element entry.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.\n\nparameter  value or range  source\nFore-aft starting point  front 1/3 over boot, rear 2/3 behind  HPA rear wing\nHeight starting point  leading edge level with roofline (front view)  HPA rear wing\nRC touring car wing height  must be lower than the roof line  AARCMCC\nRC touring car rear overhang  max 10 mm beyond body incl. bumper  AARCMCC\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- High Performance Academy: Aerodynamic performance devices for club level cars: rear wing theory — web — Publisher's page; dimensions are facts — https://www.hpacademy.com/courses/aerodynamics-fundamentals/aerodynamic-performance-devices-for-club-level-cars-rear-wing-theory\n- AARCMCC: Section 3: Electric On Road, Technical Rules (Oct 2006) — web — Publisher's page; dimensions are facts — https://www.rctech.net/forum/attachments/australian-racing/180184d1162811203-aarcmcc-online-tech-road-oct-06.pdf\n\nFree files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/rear-wing-placement/index.json\nAPI: https://xemstudio.com/api/geometry?object=rear-wing-placement\n",
 "sources": [
  {
   "publisher": "High Performance Academy",
   "title": "Aerodynamic performance devices for club level cars: rear wing theory",
   "url": "https://www.hpacademy.com/courses/aerodynamics-fundamentals/aerodynamic-performance-devices-for-club-level-cars-rear-wing-theory",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "AARCMCC",
   "title": "Section 3: Electric On Road, Technical Rules (Oct 2006)",
   "url": "https://www.rctech.net/forum/attachments/australian-racing/180184d1162811203-aarcmcc-online-tech-road-oct-06.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "rear-wing-single-element",
  "rear-wing-dual-element",
  "swan-neck-wing-mount",
  "gurney-flap-wickerbill",
  "wing-endplates",
  "front-splitter"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "Is higher always better?",
   "a": "Higher gets cleaner air, but rules often restrict it; lower positions add interaction but risk the cabin wake (HPA)."
  }
 ],
 "files_license": {
  "name": "Xem Studio Design License",
  "holder": "Xem Studio",
  "url": "https://xemstudio.com/license/",
  "note": "Xem Studio's own design: free to use, print, modify and sell things made from it; not to be republished or redistributed as files."
 },
 "offers": [
  {
   "file": "rear-wing-placement-rear-wing",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/rear-wing-placement/rear-wing-placement-rear-wing.step",
   "stl": "https://xemstudio.com/files/hardware/rear-wing-placement/rear-wing-placement-rear-wing.stl",
   "note": "single rear wing: span 1600 × chord 250 mm at 6°, endplates 300 mm, inverted NACA 4412 section (mounts from below)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/rear-wing-placement/index.md"
}