McLaren’s H-wing: the rotating rear wing arriving at Monza

McLaren has a habit of naming its cleverest aerodynamic ideas after whichever letter happens to sit on the sponsor logo nearest the hardware. In 2010 it was the F-duct, named after the F in the Vodafone livery. This weekend at Monza it is the H-wing, named after the H in Etihad Airways.

The joke is internal. The device is serious.

What the H-wing actually does

Underneath the nickname is a rotating rear wing. Instead of opening a flap, the wing element turns through 180 degrees to switch between two shapes: one that produces downforce for the corners, and one that sheds drag for the straights.

The actuator that drives it runs along the centreline of the wing, which is exactly where the Etihad H sits on the MCL40’s rear wing. Hence the name.

If that sounds like a lot of engineering for one weekend, remember where they are. Monza is the lowest-drag circuit of the season, a track where a car spends most of the lap flat out and the reward for cutting drag is enormous. It is the single best place on the calendar to bring a device like this.

Why this is a 2026 story, not a gimmick

This kind of hardware exists because of the current rulebook.

The 2026 regulations built movable aerodynamics into the car by design. Teams are meant to switch between a high-downforce configuration and a low-drag one, which turns aerodynamic mode-switching from a clever loophole into a core part of car performance. Our explainer on how active aero works under the 2026 rules covers the framework in full.

What that means in practice is that every team is solving the same problem, and the solutions are not converging. Ferrari showed a rotating rear wing during winter testing. McLaren started developing its own answer afterwards, which tells you the Woking team saw something in the Ferrari concept worth chasing.

That is the interesting part. In a season where the field is separated by how well teams have understood a brand new rulebook, watching one team copy the direction of another is a real signal.

It has taken three attempts to get here

The H-wing has not arrived out of nowhere. It has been quietly working its way onto the car all season.

A prototype turned up at the Austrian Grand Prix but never ran, held back by problems in the garage before it reached the track. A revised version appeared in practice at the Hungarian Grand Prix. Monza is where it is finally meant to do a job on a Sunday.

Two failed or partial outings before a race debut is not a bad sign. It is what a properly tested part looks like. Teams that put moving aerodynamic hardware straight into a race weekend without that groundwork tend to find out why they should not have.

What McLaren is saying

McLaren technical director Neil Houldey kept it short.

“This weekend, we have brought what we believe is needed to be competitive,” he said, referring to the new specification and the other aerodynamic changes that come with it.

That is a carefully unremarkable sentence, and it is worth noticing what it does not claim. Houldey is not promising a step. He is saying McLaren has brought what it thinks the circuit demands. At Monza, with a rotating rear wing making its race debut, that is about as much as any engineer would want to say out loud before FP1.

What to watch this weekend

Three things.

Straight-line speed in FP1. If the H-wing works, it shows up immediately in the speed trap. Monza has three of them, and there is nowhere to hide.

Whether it runs on both cars. New aerodynamic hardware often starts on one car for comparison. Running it on both from the start would say McLaren is confident.

What Ferrari does. Ferrari brought its own rotating wing concept first and has an upgrade package of its own for its home race. Monza will be the first weekend where the two interpretations of the same idea run against each other on the circuit that suits both.

Also on the grid this weekend: our previews of Alpine and Audi at the Italian Grand Prix.

Reporting via Autosport. Photo: IMAGO. Published 2 September 2026.