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Rear wing placement (height and fore-aft)

Where should a rear wing be mounted on a car? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: 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

Exact dimensions. True size, with no printing tolerance added.

sizes
4 in table

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.

Rear wing placement size chart

parametervalue or rangesource
Fore-aft starting pointfront 1/3 over boot, rear 2/3 behindHPA rear wing
Height starting pointleading edge level with roofline (front view)HPA rear wing
RC touring car wing heightmust be lower than the roof lineAARCMCC
RC touring car rear overhangmax 10 mm beyond body incl. bumperAARCMCC

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

High Performance AcademyAerodynamic performance devices for club level cars: rear wing theorywebPublisher's page; dimensions are facts
AARCMCCSection 3: Electric On Road, Technical Rules (Oct 2006)webPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

rear-wing-placement-rear-wingsingle rear wing: span 1600 × chord 250 mm at 6°, endplates 300 mm, inverted NACA 4412 section (mounts from below)STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=rear-wing-placement

Rear wing placement (height and fore-aft), isometric render of a generated part
Render of rear-wing-placement-rear-wing from the free STEP; not to scale.

Fits with

Questions

Is higher always better?

Higher gets cleaner air, but rules often restrict it; lower positions add interaction but risk the cabin wake (HPA).