Single-element rear wing (race car) — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/rear-wing-single-element/ (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/) Basis: Design rules and figures from the cited sources; example geometry by Xem Studio Catalog version: 2026-10-20 Sizes: see table below - A race-car rear wing is an inverted wing: its profile and angle push the rear of the car down, trading drag for rear grip. HP Academy notes that more curvature gives more downforce and more drag, while flatter profiles are more efficient but make less downforce (HPA rear wing theory). - Downforce rises roughly linearly with angle at low angles while the lift-to-drag ratio slowly worsens; peak downforce comes with a little trailing-edge separation, and large-scale separation makes downforce fall (HPA). - Size matters strongly: in a 2009 LMP CFD study, shrinking the wing from 2000 x 300 mm to 1600 x 250 mm cut downforce by 34% and drag by 31% (Mulsanne's Corner). - Used on: Audi R15 (2009 LMP), Acura ARX-02a (2009 LMP). - The file is a reference example built by Xem Studio from the numbers above (Span/chord from the 2009 LMP wing box (Mulsanne's Corner); 6 deg is the UIUC test incidence; endplate height illustrative. Scale to your car.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle. parameter value or range source Downforce vs angle Roughly linear at low angle; L/D slowly worsens with angle HPA rear wing Peak downforce condition Slight trailing-edge separation; large-scale separation reduces downforce HPA rear wing LMP rear wing box, 2008 rules 2000 mm span x 300 mm chord Mulsanne's Corner LMP rear wing box, 2009 rules 1600 mm span x 250 mm chord Mulsanne's Corner 2008 benchmark wing (CFD) 1739 lb downforce, 226 lb drag, L/D 7.69 Mulsanne's Corner 2008 profile scaled to 2009 box 1146 lb (-34%), 156 lb drag (-31%), L/D 7.36 Mulsanne's Corner Wind-tunnel test incidence (open-wheel front wing) alpha = 6 deg at Re 1.1e6 Jasinski & Selig (UIUC) Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - 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 - Mulsanne's Corner: The Rise of the Swan Neck (2009 LMP rear wing CFD study) — web — Publisher's page; dimensions are facts — https://www.mulsannescorner.com/rearwingLMPCFD2009.html - University of Illinois / SAE: Experimental Study of Open-Wheel Race-Car Front Wings (Jasinski & Selig, SAE 1998) — web — Publisher's page; dimensions are facts — https://m-selig.web.engr.illinois.edu/pubs/JasinskiSelig-1998-MSEC-SAE-Trans-V107-S6.pdf Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/rear-wing-single-element/index.json API: https://xemstudio.com/api/geometry?object=rear-wing-single-element