McLaren team principal Andrea Stella has clarified the issues with Lando Norris's current Mercedes power unit, as the reigning champion rued the lack of straightline speed in Formula 1 qualifying for the second week running.
Although McLaren is known to be missing straightline speed versus its other Mercedes-powered counterparts owing to its selected gear ratios being lower, Lando Norris had a deficit on top of that across the Baku weekend. This deficit has resurfaced, although McLaren was losing further time across qualifying when compared to Red Bull and Ferrari.
Lando Norris, McLaren
Lando Norris confirmed this, stating: "I'm just down on every single straight, so every time I get a good exit, I'm just slower at the end of the straight. It just hurts seeing this every single time."
Stella explained the mechanics at play with Lando Norris's power unit issue, but added that it was difficult to diagnose given the complexities of the current regulations and the myriad factors that could hold an effect. A deployment issue, for instance, would be easier to spot - but a mechanical issue outside of the reach of sensors would be tough to identify.
The Italian believes that this is costing Lando Norris somewhere between 0.1-0.2s seconds per lap, a not-insignificant deficit given the margins involved in qualifying for this weekend's event in Sepang.
"I think more precisely we should say that the issue we see on Lando Norris's car is about a lack of straightline speed. So we see that in the power limited section, the car accelerates a little less and develops a little bit less top speed, all the other parameters being the same," Stella explained.
Car data
"We talk about probably between one and two kilometres per hour, they are small quantities, and they are even difficult to see. As soon as Lando Norris, for instance, has a little bit of slipstream from a car four seconds ahead, now you see Lando Norris faster than the other car."
"So, it's a small quantities but that we see statistically and we should more precisely talk about the deficit of straightline speed, which we can quantify in a lap time loss that I would say in excess of one tenth of a second, possibly between one and two tenths of a second."
"A different conversation is about why that is and while we can talk immediately about a lack of power, in reality there can be different reasons."
Stella added that those external factors could be nothing to do with the power unit at all, and was keen to avoid a situation where his comments could be construed as blame on Mercedes's High Performance Powertrains division.
The main issue seemed to be largely restricted to the latter half of the lap, where Oscar Piastri found more top speed over Lando Norris between Turns 13 and 14, and then on the back straight towards Turn 15.
"But at the same time there's the areas of the power unit that depend on what's happening on the chassis side and finally there could be parameters that have to do with the drag of the car," Stella continued.
"At no point we are making a point about power unit, we are just making a point about a lack of straightline speed which we want to make a point about - because it's fair to Lando Norris that we take the responsibility for the fact that on his car there's a lap time deficit which at the moment we have not been able to remove in a couple of events."
"But obviously we are definitely looking at all the possible parameters and we will look at further changes but we only can do that now for Singapore."
Lando Norris currently sits 4th in the drivers' standings with 186 points.
Source: Autosport
