CHALLENGE INTER ENTREPRISES · COURSE Race⏱ 2h08

The RKC Racing Kart de Cormeilles circuit in Boissy-l'Aillerie hosted a commanding endurance race on 9 September 2026, with 38 teams taking the start over 127 minutes on the 1,200-metre Piste 1 layout. The event brought together a strong field spanning corporate outfits, aviation giants and specialist racing squads, delivering an intensely fought contest throughout.

CEIDF 1 (kart #35) crossed the line first with 103 laps completed, claiming victory over CEIDF 4 (kart #11) by 20.308 seconds. Third place went to Dassault Cergy 1 (kart #29), also on 103 laps, a further 6.5 seconds adrift. The top three were separated by less than half a minute after more than two hours of racing — a testament to the tightness of the contest at the front. All three podium finishers made 5 pit stops apiece.

CEIDF 1's winning margin came despite not holding the fastest pure pace on track. Their median race pace was 1:06.479, ranking them 2nd in pure rhythm. It was CEIDF 4 who posted the sharpest median pace of the entire field at 1:06.360 — yet a strategic difference ultimately cost them the win. CEIDF 1 also set the fastest lap of the race, a 1:05.673, achieved in their opening stint. Their consistency across four stints was exemplary, with a global standard deviation of just 0.79 s and all stints rated as stable.

CEIDF 4 ran only three stints compared to CEIDF 1's four, and while each was individually stable and rapid, the single-lap deficit at the flag tells its own story. Their third and final stint, covering 37 laps at a median of 1:06.141, was their strongest, but it was not enough to overhaul the leaders. Dassault Cergy 1 built their podium on remarkable regularity (σ = 0.52 s) and five consistent stints, their pace improving progressively through the race.

The honour of most consistent team across the race belongs to Kairos Logistique (5th, kart #16), whose standard deviation of just 0.44 s was the lowest in the analysed field. They completed 103 laps with a median pace of 1:07.014, never wavering across four stints — a display of remarkable collective discipline that earned them 5th overall.

Among the notable analytical findings, Presta ESN (27th overall, kart #36) held the 12th-best pure pace in the race at a median of 1:06.147 — a significant disconnect between speed and final classification. Conversely, Air France 2 (18th) outperformed their pure-pace ranking of 25th through strategic execution. At the other end of the spectrum, FT Auto recorded the steepest pace drop of the race, losing 0.60 s per lap through their opening stint.

Key takeaways for teams: At Cormeilles, pure speed alone does not determine the outcome — CEIDF 4's superior median pace was not converted into victory. Stint architecture, consistency (σ below 0.80 s throughout the leading group), and managing degradation from the very first relay are the decisive levers. Teams with rapid pace but poor classification, such as Presta ESN, would benefit from reviewing their overall race management strategy rather than focusing solely on lap time. The Cormeilles 1,200 m circuit rewards those who combine speed with regularity over the long haul.