The Norris-Hamilton fight reached its crescendo late on. In simple terms, Norris passed Hamilton into the final chicane on lap 50, Hamilton re-passed him on the straight immediately, but Norris then got ahead for good into the chicane the next time by and Hamilton was actually unable to retaliate.
It looked like a reasonable conclusion to a battle that had been brewing for much of the final stint. But as Norris said, there was an oddity involved that is jarring.
“The problem is it [the battery] deploys into 130R - I have to lift, otherwise I'll drive into him, and I'm not allowed to go back on throttle,” Norris said when asked by The Race to explain what he meant by not being in control.
“If I go on throttle, my battery deploys, and I don't want it to deploy because it should have come.
“But because you lift, you have to go back on [throttle], it re-deploys. There's nothing I can do about it.
“So, there's just not enough control for a driver, and that's why you're just too much at the mercy of what's behind you. It's just not how it should be.”
What Norris describes is a function of the complex relationship between F1’s new overtake mode, the general problem of having a battery that cannot sustain the deployment of the MGU-K, and complex rules that demand what the engine does in certain situations.
The best overtaking spots are the straight to Turn 1, and at the end of the lap into the chicane. When behind Hamilton, Norris had overtake mode to use - giving him a little more charging allowance and the MGU-K’s full 350kW power for slightly longer when normally deployment tapers off.
We can take the (brief) overtake on lap 50 as an example. As Norris used overtake mode behind Hamilton on the straight towards 130R, that extra MGU-K usage took a lot out of the battery. But it also brought Norris very close to the back of the Ferrari, at high speed - close to 340km/h through 130R, which actually makes that easy flat-out kink into more of a corner.
So Norris - who had no MGU-K use by that point - lifted not just to avoid contact but because of the grip demands. By lifting significantly, though, Norris fell into the problem of F1’s overly complicated ‘power limited pending’ rules.
The simple version of this is that when throttle application dips below 98%, accelerating again will automatically cause the MGU-K to deploy briefly at 200kW, which eats into the battery when it should be being saved.
This uses up a vital bit of the remaining energy and therefore reduces what is left to be used on the exit of the final chicane and down the start-finish straight. So if an overtake is completed into the chicane, the driver is vulnerable right after. And if the overtake is not completed, there is no chance of getting ahead into Turn 1.
Norris’s state of near-confusion over what to do in a situation like this was highlighted by his throttle usage mid-overtake. He did squeeze the throttle again, but not back to 100%, and then reduced it immediately, hovering around 50% as he passed the Ferrari. It was an almost apologetic overtake.