What happens to a Formula 1 car in a demanding corner like the Degner Curve at Suzuka? We've got the inside line from Mercedes’ chief race engineer

This spectacular image of Nico Rosberg in his Mercedes F1 W07 Hybrid was taken during Friday practice at the 2016 Japanese Grand Prix.

Captured at Suzuka’s Degner Curve, it shows just how hard a Formula 1 car has to work when it is being driven flat out. But what exactly is going on here? To get a better understanding of this brief but breathtaking on-track moment, we asked Mercedes chief race engineer Andy Shovlin to explain.

1. Why is the tyre deforming like that? (rear left tyre)

“The peak load on the tyre at that point is nearly one tonne, due to the compression in the track,” says Shovlin. “The high load lasts for 0.05sec, which is what is causing the standing wave on the left-hand-side tyre. Even in a flat-out 300km/h [186mph]corner like Suzuka’s 130R, the loads aren’t quite as severe as they are here, although Spa’s Eau Rouge is another place on the calendar where we get this kind of load.”

2. What can Rosberg feel at this point?

“He’s taking this corner at about 230km/h [143mph] and is facing a 2g vertical impact, along with 3.5g horizontal. It’s very short – about five metres of travel – so it’ll be just like a bit of a bang to Nico.

“Once you come out of the compression, the car is stable, so he can get straight back on the power for another 1.5sec before the next corner.”

3. Why is the car bottoming out?

“The sparks are coming from under the car but also from the front wing and travelling down to the back.

“A combination of things is putting really hard load on the car to cause this. You’ve got the downforce and the fact that the car is cornering at speed and then you’ve got this bump in the track causing a spike in that load trace.

“The impact will vary from car to car, as will the lifting of the front wheel. With our car, the front inside wheel is lifted almost completely off the track, such are the loads.

4. What’s unique about the Degner Curve to create this?

“It’s an unusual corner where you get a compression right at the apex, but the car’s reaction here is a relatively normal operation in a race. It’s tough corners like this that determine what pressures Pirelli recommends we can run.

“Nico was running low fuel at this stage in free practice, and while the car was lighter, this meant he could push harder and therefore get a higher peak of downforce.”

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Comments
11

5 November 2016
My life is now complete that I know this...

5 November 2016
Now we discover that the outside tyres of a car are more heavily loaded during cornering - shock, horror!

5 November 2016
...this is really interesting to me. Nice article.

5 November 2016
First two comments a bit pathetic. Go out for a nice walk if this doesn't interest you. Personally, I find F1 on TV pretty dull these days - interesting to see a moment that reminds us just how much drama is really happening to car and driver.

5 November 2016
Scrap…I did as you suggested and went for a walk…I then saw a dog take a sh** and it instantly reminded me of the similarities between said dogs' bowel movement and F1…they are both crap.

24 February 2017
..if people aren't interested in something they take the time to make pointless facile comments? Do they find some pleasure in displaying to us their wit and all round cleverness? I found this article interesting, if I didn't I would say nowt.
Sarky traffic cops before speed cameras were invented.......... "Having trouble taking off Wing Commander?"

5 November 2016
Must admit I've seen this picture before, but without the explanation. On its own, the image just looks wrong, as if the car's suspension was just too soft. But I hadn't appreciated the loads involved nor that there was a huge bump in the middle of the corner. It's a pity that TV coverage doesn't convey the sheer violence involved and the massive commitment of the drivers. I imagine that the average fairground ride would pretty relaxing by comparison!

6 November 2016
I'm no fan of F1 - far from it - but I think it's a great pic and an interesting article. And it doesn't read like advertorial. Good stuff IMO!

6 November 2016
I think it is very good photograph and, with the article, provides an interesting insight into the forces involved in travelling so fast round a track. I have to assume some of the early responders here are too thick to understand what they read.

Citroëniste.

6 November 2016
What he said!

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