Emag wrote: ↑23 Dec 2025, 22:49
FittingMechanics wrote: ↑23 Dec 2025, 21:20
"program code to coordinate ERS and the active aero deployment"?
What is that supposed to mean?
Total BS lol. No idea where he pulled that from. Also, power units are not lego pieces that only fit to a certain car. It’s not as simple as they make it out to be. Would be silly to call the pecking order before we see a single lap driven.
You're right that an F1 car isn't made of Legos, but you're missing the systems architecture reality of the 2026 rules.
In 2026, the car becomes a unified system. The active aero (front and rear wings moving between "X-mode" and "Z-mode") must happen in perfect sync with the ERS deployment (the 350kW electric boost).
Mercedes HPP (the engine side) writes the code that governs how the battery delivers power. McLaren receives a "compiled" version of this code. They can change settings (like turning a dial), but they cannot rewrite the underlying logic.
If McLaren’s aero philosophy requires the wing to stall at a specific millisecond to save battery, but the Mercedes engine software isn't programmed to "expect" that aero drop at that exact moment, the car becomes unstable or inefficient.
This isn’t internet speculation. It’s straight out of how 2026 is designed:
350 kW ERS = ~50% of lap-time influence
Active aero switching states dynamically
Energy deployment governed by PU supplier software
Customer teams receive calibration access, not source code
That’s standard in F1. No customer team in history has rewritten a supplier’s PU control laws.
Red Bull (with Ford support via Red Bull Powertrains) has zero such constraint: full in-house control means they can tailor the PU software, deployment profiles, and hardware exactly to their chassis/active aero philosophy (and vice versa) for seamless integration. Red Bull absolutely holds the strongest long-term cards for 2026 and beyond when it comes to power unit integration—the exact advantage customer teams like McLaren lack.