F1 Clipping Explained: Why 2026 Cars Slow Down on the Straight
Welcome to the Happy Hour Racing Formula 1 Tech Breakdown - where we take one confusing part of F1 and make it make sense. No engineering degree required.
The Short Version
If you have watched a 2026 Formula 1 race and thought a car looked like it gave up halfway down the straight, you were not imagining it. These cars get roughly half their power from a battery, and that battery can empty before the braking zone. When it does, the car drops to engine power only and visibly backs off. That is called clipping. It is the defining story of the 2026 season, and it has a weird cousin called super clipping.
Half the Power Now Comes From a Battery
Start with what changed. The old F1 cars got about 80 percent of their power from the gasoline engine and about 20 percent from the hybrid system. For 2026, the rulebook rebalanced that to a target of roughly 50-50.
The gas engine is still a 1.6-liter V6 with a turbocharger. What grew is the electric motor, called the MGU-K. It jumped from 120 kilowatts to 350 kilowatts, which is close to 470 horsepower on its own. At the same time the old heat-recovery motor, the MGU-H, was deleted entirely because it was expensive and complicated, and dropping it made it realistic for new manufacturers like Audi to build an F1 engine.
So a 2026 car is somewhere around 1,000 horsepower, but only if the battery has something in it. That is the whole catch.
Where the Energy Actually Comes From
A battery in a race car is not charged in the garage overnight. It is filled during the lap, mostly under braking. When the driver hits the brakes, the MGU-K flips from being a motor to being a generator. Instead of pushing the car, it drags on the rear axle and turns that slowing-down force into electricity.
That means braking zones are refueling stops for the battery. A twisty circuit with lots of heavy braking gives a driver plenty of chances to top up. A circuit that is mostly flat out does not.
The rulebook also puts a ceiling on it. A 2026 car can recover somewhere around 8.5 megajoules per lap, which is more than four times what the previous generation managed. Generous as that sounds, these cars burn through it fast, because 350 kilowatts of deployment empties a battery in a hurry.
Clipping: When the Battery Taps Out
Clipping is the moment the electric help goes away while the driver is still asking for everything. The engine keeps pulling, the motor stops, and the car carries on down the straight on roughly half the power it had a second earlier. Nothing is broken. The car simply has nothing left to spend.
There is a second reason the power fades, and this one is written into the rules on purpose. The electric boost is not allowed to run flat out at every speed. A driver gets the full 350 kilowatts up to about 290 km/h, and above that the allowance tapers down, reaching zero somewhere around 355 km/h. The idea is to stop teams from simply adding electric power to an already enormous top speed.
Super Clipping: Charging While Flat Out
Here is the part that confuses even longtime fans. Sometimes a car loses power on the straight on purpose.
Teams need to refill the battery, and braking zones alone are not always enough. So they can force the MGU-K into generator mode while the driver is still flat on the throttle. The engine runs, but a chunk of its output gets routed into the battery instead of the rear tires. The car stops accelerating as hard. That is super clipping.
McLaren team principal Andrea Stella summed it up plainly: the super clip is when the electric motor starts to harvest even though the driver is at full throttle.
Why do it that way instead of just lifting off? Because of active aero. The moment a driver lifts, the wings snap back into high-downforce corner mode, which adds drag and costs speed. Staying flat keeps the wings in low-drag straight mode, so the team gets its charge while giving up less lap time. It also avoids a driver suddenly slowing in front of a pack of cars, which is its own safety problem.
Why Monza Broke the Math
The FIA can set the recharge limit race by race, and it has been using that dial all season. Qualifying runs a tighter cap than practice so drivers are not rewarded for deliberately slowing down on a flying lap. Then there is Monza.
Monza is nearly all throttle and almost no braking, which is exactly the circuit these rules were not built for. For the Italian Grand Prix on September 6, the FIA cut the harvest limit to 5 megajoules a lap, the lowest figure of the season to that point, to keep cars from spending the whole lap charging.
Lewis Hamilton described what it feels like from inside: down the straights the car is still quick, and then the power goes away, and he arrives maybe 20 to 30 km/h slower than in past years at the end going into the corners.
F1 did not ignore the complaints. In April the FIA, the teams and the engine manufacturers agreed a package of in-season refinements, including raising the power of super clipping from 250 kilowatts to 350 kilowatts so the charging burst is sharper and shorter, with a target of only about two to four seconds of it per lap.
A number of refinements to the 2026 FIA Formula One World Championship regulations were agreed today during an online meeting between the FIA, Team Principals, CEOs of Power Unit Manufacturers and FOM
— FIA (@fia) April 20, 2026
What You Will Actually See On Track
Now that you know the vocabulary, three things on your screen stop looking like glitches.
A car fading at the end of a long straight. That is clipping. The battery is spent or the boost has tapered off with speed, and the car is on engine power alone.
A car that seems to short-shift or back off while still flat out. That is super clipping, and the wings staying flat is your tell that the driver has not lifted.
A chasing car surging past a defender who looked faster all lap. That is Manual Override, holding full electric power to 337 km/h plus an extra half megajoule to spend. It is the 2026 replacement for DRS, and unlike DRS it rewards the driver who managed energy better over the previous two corners.
The Bottom Line
In 2026, lap time is an energy budget. Half the power lives in a battery that only refills under braking, so every driver is deciding when to spend and when to save. Clipping is what running out looks like. Super clipping is what saving on purpose looks like. The fastest car is no longer just the one with the biggest engine - it is the one whose driver gets to the end of the straight with something left.
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