Why Is There a Wooden Plank Under Every F1 Car?

Under every Formula One car, there's a plank. It scrapes the track at 200 mph, throwing sparks. If it wears too thin, the car is disqualified. Its real job is to tell on the car. A 3D engineering breakdown of the F1 plank, or skid block, bolted along the middle of the floor. The floor works like an upside-down wing: the lower it runs, the harder it pulls the car down (ground effect), so every team wants its car low. In 1994, after Ayrton Senna died at Imola, every car got a strip of hardwood underneath to force it higher and slower. Today it's a tougher composite, but the name stuck. It's 10 mm thick, about as thick as a phone. Run too low and the track grinds it thinner; after the race it must still be 8 mm thick, measured around three holes along its length. Two millimeters of wear is about the thickness of a nickel. At speed, downforce squashes the car and every bump slams it lower, so teams hunt for the last millimeter. The sparks are white-hot shavings off the metal skid blocks set into the plank, usually titanium. In Las Vegas in 2025, McLaren's cars began bouncing at speed; they finished second and fourth and both were disqualified. Lando Norris's plank was about a tenth of a millimeter too thin, roughly one sheet of paper. He won the title anyway, by two points. Notes: 8 mm is the 2026 minimum; in 2025 it was 9 mm, which is what the Las Vegas planks were measured against. The micrometer readings, the wear on the plank, the bounce and the 0.1 mm gap are illustrations, not measured data. The 1994 car is a generic 1994-era car (a repainted Benetton B194 model), not Senna's Williams. The Las Vegas street is a stand-in with out-of-focus city lights. Engine sound is partly synthesized. Slow motion, x-ray views, frozen time, lines and labels are illustrations. "OddFrame" markings are the channel's. Sources: - FIA 2026 F1 Technical Regulations, Section C, Issue 20 (2026-08-05), Art. C3.6: plank 10 +/- 0.2 mm new, minimum 8 mm, three 34 mm holes, metal skids (titanium alloy or steel) - https://www.fia.com/regulation/category/110 - Formula1.com, 2025-11-24: Norris and Piastri disqualified from the Las Vegas GP for plank wear below the 9 mm limit; McLaren cites "unexpected, high levels of porpoising" - Formula1.com, 2023-10-23: why the plank exists (since 1994, to stop cars running too close to the ground) - Wikipedia, 1994 Formula One World Championship: wooden skid block introduced after Imola to raise ride heights - https://en.wikipedia.org/wiki/1994_Formula_One_World_Championship - Permali (plank material maker): composite planks in F1 from 1998, densified wood gone by 2005 - The Race, 2025-04-20: titanium skids since 2015 replaced tungsten; the sparks are white-hot titanium - 2025 drivers' championship: Norris 423 points, Verstappen 421 3D models (modified for this animation), licensed under CC BY 4.0 - https://creativecommons.org/licenses/by/4.0/ - "F1 2026 concept (polygon model)" by Qvist_designs - https://sketchfab.com/3d-models/f1-2026-concept-polygon-model-ea3bde709b1e4dc9b0ec8557d106ed42 - "1994 Benetton B194" by Dave Love SketchFab (Tyler_Dave) - https://sketchfab.com/3d-models/1994-benetton-b194-55056ddc80ff4da7be35ff0c79953c34 The plank with its titanium skids and measuring holes, the plank exhibit, the wing section, the phone, the nickel, the paper and the micrometer were modelled for this video; both cars were repainted, with all team and sponsor markings removed. Nickel faces: U.S. Mint images (public domain). Sky, asphalt, grass, sand, concrete and night-city textures: Poly Haven (CC0). Sound effects: Formula 1 racing by LordFluffeh, night city air by leonelmail, hydraulic hoist by chainsaw_dinner_party (Freesound, CC0); Mixkit. Not affiliated with Formula 1, the FIA, McLaren, Benetton, Williams or Permali. Educational animation. #shorts #f1 #formula1 #engineering #howitworks