Erasing Rational Thought: Driving Le Mans

These days it’s easy to watch modern race cars and underestimate the enormous effort and skill that’s required to keep the things on the track. Laden with aero, cars can look so stable and unerring in directional change that the velocities they’re racing at appear deceptively slower than they actually are. Unfortunately it often takes a huge accident to remind us of the fine line between grip and disaster.

At this year’s Le Mans 24 Hours, several cars were severely damaged during practice and qualifying, slamming into barriers as that line was crossed with dramatic results. As we know, this pattern culminated with the tragic death of Allan Simonsen in the #95 Aston Martin Vantage early in the race itself. The whole event was rocked by the loss of this popular driver, and it highlighted the risks that racing drivers take every time they venture out on track, even in these safety-conscious times. The inherent danger of motorsport hasn’t gone away, and never will.

Putting that sad event to one side, in this story I wanted to investigate what it’s like to be inside a cockpit at Le Mans: what aids drivers have to help them, how they cope with the changing track conditions around the long lap and the constant traffic – especially when night descends.

In the run up to the event, I talked to factory Corvette GTE-Pro driver Tommy Milner to get the driver’s perspective on what it’s like to be behind the wheel around the Circuit de la Sarthe. He was part of the crew for the #74 C6-ZR1, driving alongside Oliver Gavin and Richard Westbrook.

Tough doesn’t begin to sum up the conditions at Le Mans, particularly when you have weather changing all the time and eight hours of pitch black driving in the mix.

Tommy: “It’s an incredible challenge to go fast at Le Mans, especially at night. You need to have a lot of trust in both yourself and your car. In a way you need to switch off the rational part of your mind in the dark. You need to think stupid! You really can’t see what you’re doing…

“There are certain sections at Le Mans where there’s zero light. You are truly driving blind: you can’t see where the exit kerb is at all. It takes a few laps of turning the car in and seeing what happens, whether it was too far or not far enough, and then adjusting from there. It’s where stupidity comes in! And that’s when you’re by yourself. At Le Mans you have to add in passing other people and being passed yourself.”

Gone are the days when you drove a car purely by the seat of your pants: just you and an oily mechanical warhorse beneath you. Modern GTs and prototypes are hives of technology, controlled by computers and powered by electronics, backed up by a team of personnel back in the garage.

Tyres, brakes, engine, temperatures, shift lights, apexes, track-outs, mirrors, radar, straining eyes, radio, night vision glasses, aching arms, position, opposition, traffic, pit-stop, gravel, dirt, rubber, rain, sun, cloud, darkness, oil, damage… These are just some of the myriad things a driver has to think about, all whilst travelling at over 180mph.

Le Mans takes the normal challenge of a race and magnifies it. Multiple classes. Phenomenally fast straights. Long periods of full throttle. Constant traffic. A day-long race. The Nürburgring seems dangerous enough, but Le Mans is a high-speed pressure cooker.

There may have been four groups of cars (two prototype and two GT classes), but they could then be split down into further sub categories (factory versus privateer, differing quality driver line-ups and so on) – though none of that really mattered. There were 56 cars, so there were 56 classes. Each car was in its own race, its own battle to win. To get through the 24 hours. To make it through.

It looked hard enough to watch from the side of the track, safely tucked behind a lens. There was never time to look away – cars passed by in a constant stream, drivers sending in passes this way and that, opponents locking up or skating wide in avoidance as everyone tries to lose minimum time whilst maintaining maximum forward momentum. How about coming over the blind brow at Dunlop to find an LMP2 facing the wrong way?

Tommy: “We get help from the on-board systems and crew to keep informed about cars coming up behind, but passing and trying to get through traffic is completely up to the driver. A lot of drivers want to defend their position, even if it’s against an LMP. You can spend a couple of corners fighting with someone and lose a lot of time. There are many cases where it’s better to let someone by and just carry on.

“At Le Mans we’re racing and passing cars that are driven by both pros and amateur crews: the car you may have been racing an hour ago with an amateur driver might now have a pro – that can present more of a challenge on one level, but in other ways it’s easier as usually the guys that are good know that you’ve caught them quickly, and might let you by into the next braking zone so you can both get on. But the ‘ams’ are more unpredictable: you sometimes have to take risks to get by them ASAP and be done with it to save problems.”

The crazy thing is that for at least the first half of the race – a cool 12 hours, remember – Tommy and the rest of the dozen or so fastest GTs would be battling around 20th position at best. 20th. Not first, or fifth. Or even 10th. With modern reliability, barring melt-down the GTE leaders were only ever going to be into the teens come the end of the race.

Yet these were the fastest GT racing cars on the planet. The GTE cars have already got down to the kind of times being set by the old fire-breathing GT1 cars around Le Mans, down into the low 3m50s. The pros treat the Le Mans 24 Hours with maximum respect. It’s about that speed. There is no other race track where the cars reach maximum velocity so often or maintain it for so long.

Tommy: “The first section from the start to Tertre Rouge is like a regular track, with great big open spaces and sweepers. It’s wide open and you have lots of room. It feels easy in the car, relatively speaking.”

That’s quite some use of the term ‘easy’!

Next you have the public roads section: lined with Armco, a narrow aperture to aim the car down, interrupted by the two chicanes. It’s here that you get the reinforcement of just how fast cars go on the Hunaudières straight, where the cars hit maximum velocity within seconds, maintaining it right down to the chicane braking zones.

As the cars zipped past in high-speed slipstreaming battles, I became a bit punch drunk from the doppler effect of the engines bouncing off the trees and buildings. The Ferrari 458 in particular had a rasping high note that doubled back across the track as it passed.

Tommy: “That section feels incredibly fast. It’s broken up by some very difficult big braking zones at the chicanes and at Mulsanne, which are easy to underestimate.

“What’s difficult about them is that we’re braking super, super late. That’s one thing that makes it so tough now: if you look back at older cars with their longer braking distances you had time to make a move and be a bit more creative on the brakes. Whereas we’re so late on the brakes, going way past the 200-metre marker for both chicanes; the time we’re on the brakes is very short.

“We’re bleeding from 175-180mph down to probably 60mph in a really short amount of time; we’re on a public road with a crown, it’s hard to see the corners… It was difficult to trust myself for the first couple of years: you had to be massively confident in the braking zones.”

The long run back from Arnage funnels down at the Porsche Curves into a final blast between concrete walls, again with massive entry and exit speeds before braking for the Ford Chicane just before the finish line.

Tommy: “The Porsche Curves is probably the most difficult section on the track. At some point the car won’t be that great to drive – when you’re on older tyres or things like that – and that’s when it’s massively difficult to keep the speed up. Anyone can drive slower and sort of ignore the problem, but it’s very hard to keep the speed up when the car’s not that good because it’s so quick and we run so little downforce.

“On our car we tend to be a bit loose with the set-up, with a little bit more understeer, so as the car degrades we lose a lot of directional grip. The hardest part of the Porsche Curves is the entry: you’re looking right as that’s where the corner is going, but you’re also having to check to the left for your braking marker and reference point for the turn-in. The kerb starts quite late, and there are some bumps in the braking zone, so a lot of people were dropping a wheel off the track and spreading dirt all over the road – which you then can’t see at night. It’s a similar situation at the exit of Arnage.”

Even the quickest GT car would have prototypes behind them every lap, lights flashing, diving this way and that, trying every line to get past, through, over or under the car in front. When I asked Tommy about how that feels at night, he had a wry smile…

Tommy: “Just driving at night is a challenge, period. But then at Le Mans you’re going so much faster for so much of the race track. Your reference points completely change: you rely 100 percent on the reflectors by the side of the track. When you’re going 175mph, those reflectors are pretty much a blur, so they really only define the edges of the track. You’re then looking for the brake markers, which are normally reflective thankfully. 

“You do kind of get tunnel vision around the track, particularly driving down the Mulsanne. You’re peering as far down the road as you possibly can look, just trying to pick out the braking point. Once you think you’ve got it, you follow it in, double check that it is actually the right point and then just go for it. There’s a lot of the lap where you’re not even looking forward: you’re looking at your rear-view camera, the dash read-outs, the mirrors or checking for reference points by the side of the road – other things besides the road. There’s really not much to see out there!

“When you put in a good lap at night it doesn’t feel any better or faster than during the day, but when you’re slow at night it’s easy to make excuses: you can’t see well, so you know you’ve been more cautious on the brakes. You need to get rid of those apprehensions. Then it just feels natural. It’s almost anti-climactic. You feel you should go faster, should go faster, and then when you do you’re like, ‘Oh, I went fast!’. But it is fun, nonetheless. Strangely it can help when you’re in a fight. Back at Sebring, when I knew I was close to the leading Ferrari it became a lot easier to forget about the fact that I couldn’t see a lot of the race track.”

We’ve all driven on the road at night, and even on a public road you tend to have heightened senses and need to have a bit of blind trust in the road ahead.

Tommy: “At night you go a lot off your muscle memory, of what you learned from driving during the day when you have every reference point. You get a rhythm in the daytime, and for night driving you try to find that rhythm again. When you can get back in that groove, even without really being able to see what’s going on, that’s when you go quickly. You have to know you can turn in. For instance, at the Porsche Curves, it’s fairly well lit on entry but it gets dark as you go around it. But there’s a rhythm and flow that gets ingrained from driving so many laps, that you can then reflect on at night to get back on the level.

“Muscle memory gets you about 95 percent there, but for the first three or four laps at night it feels completely different from the last time you drove in the day. You can’t see anything, you have to rely on your memory and trust yourself, that you can hurl the car into a corner and trust that you’re going to be on line. Here, if you’re even a car-width off line you’ll have way less grip, so if you really throw it in you probably won’t make the corner.”

So what tools are at a driver’s disposal, above their own raw talent? Looking at the Corvette, just seeing the track appears hard enough. The raked windscreen has two sunstrips, but the actual slot that the drivers can see out of is only the tiny gap at the bottom. The middle strip cuts down on glare and keeps the heat down. I suppose that with a helmet on, having a big windscreen area wouldn’t help anyway…

There are side mirrors, but typically for a race car they’re pretty flimsy and look like they’ll bounce around at speed.

Tommy: “We have the mirrors, but they’re not really aimed that well and usually just bother me! They’re really only good to see what’s way back in the distance. You mostly just see Corvette bodywork in any case: only the outer portion of the mirror shows any track because of how wide the rear fenders are.”

With a closed-off rear there’s no rear-view mirror, so the Corvettes have long carried a camera system to give better views out back. The biggest improvement to the camera and cockpit screen was the addition last year of a radar system to supplement the picture and provide invaluable overlays about traffic.

Tommy: “The radar system helps us massively in that regard. It helps us focus on driving and less about what’s happening behind us. It shows when a car is coming up, whether it’s quick, how fast it’s catching us and if it’s going to catch you by the next corner. It makes it a bit nicer to drive at night.”

It’s an insanely cool system: the radar picks up moving objects (even stationary in the pits, it would pick up team members walking around the garage) and mark them: red for moving in, yellow for staying the same and green for moving away. The chevrons change shape and size depending on distance, and combine with scales on either side of the screen to show distance and closing speed. Finally, the biggest help is a big red arrow that points to the side of the car that the overtaking car is coming from.

Here’s a video clip from the development system – it’s now even more sophisticated.

Electronic gizmos may help with what’s behind, but the most basic and obvious aid sits out front: headlights.

Tommy: “In the dark you’re hoping your lights are aimed perfectly so you can see the reference points. That’s the hardest thing at night. All the braking markers are reflective, but your apexes and track out points are not. They’re in the darkness until they’re lit up by your lights, only then you can see them.

“We try and set up our lights to get as wide an arc as possible. We have two that aim sideways like corner lights, and two that shoot forward so they light up all the reflective bits and pieces that are out there. The team has a system at the shop where they aim and align all the lights, so all of our spares have been set up in case we need to swap them. Of course, whilst it’s great if your own headlights are bright, there are 50-plus cars around you also packing blinding beams.

“The biggest problem is with the Audis. They run the brightest lights they possibly can, which can override the sensor on our camera system; it washes out the picture. At least you know straight away that it’s an Audi…

“We can adjust the brightness of the screen, so at least now I don’t get quite as dazzled as I have been in the past. Also, the radar can now pick through that so it’s no longer much of an issue, and we’ve tested turning the brightness way down so almost all you can see are two headlight dots and little flare. It can be a little disorientating though, as you don’t get as much depth, but it’s an option.”

Backing up the data is a vital human element back in the pits: namely Tommy’s crew chief Brian Hoye and his team, who sat in the garage in front of a long line of screens linked to CCTV and TV camera coverage around the track.

It was an impressive sight: Brian had picked out cameras spaced around the lap, and each screen was marked with an approximate time stamp so if they lost sight of their driver they could use the lap-time to pick the car up on the next appropriate screen. They also had access to the ACO’s GPS-linked car tracker and a big telemetry screen for each car.

Tommy: “Brian spotted for me almost all through a race; there’s always someone on the radio. He’ll tell me what cars are coming and give me a heads-up, such as that an LMP2 car is six seconds back and closing. For an LMP1 he’ll tell me way in advance, like maybe when it’s 10 or 15 seconds away. It just clues me in and allows me to drive out of the windshield.

“Then when I see the chevrons coming up on the screen I can know what’s coming up. There are different functions: if a really quick car comes you see a different shape and colour. If the colour is red it means that it’s got a higher closing speed. All those little clues – Brian talking to me, the different colour chevrons, the different shapes – I can know what car it is and then plan ahead. Am I in an area where I should let him by now, or can I get through three or four more comers before I see him?”

The Corvette team have made sure that all this information doesn’t overload the driver: my thought was that all the technology might actually detract from the driver’s ability to concentrate on hands and feet, but the team have evolved their combination of spotter and on-board tech.

Looking inside the cockpit, all the screens are specifically positioned to be in the near eyeline without being overwhelming. Inside the exceedingly tight cockpit, the main dash readout is just below the windscreen, with the TV screen to the right.

Tommy: “I’m now really only studying the screens when Brian gives me specific warnings, then I make a concerted effort to look. It’s changed how I use that camera: in the past I would always take periodic looks, just check, check, check. But now anything that comes up behind me will show up on the radar, and it’s a very obvious thing.

“Initially we sort of lost that depth perception you get from seeing a car in the mirror. It’s a flat screen and hard to judge distances, but now with the radar we’re able to go back to not having to drive in the mirrors. It’s made our lives easier, as in our peripheral vision we have these obvious, simple colours and shapes that show up on the screen, so we can catch things in our peripheral vision and just focus on what’s ahead of us.”

And then what about the driver himself? Fitness and skill is one thing, but even I know from driving for five hours in the pouring rain to get to Le Mans how tiring driving can be on the eyes. That’s where a new take on an old idea comes in: yellow tinted driving glasses But the Squadras that Tommy and a number of other drivers now use come with a high-tech twist from TAG Heuer, which correct night-time myopia and have an anti-glare coating.

Tommy: “It’s easy to get a bit lost as to where you are on the racetrack, like on the Mulsanne, there are times that if you look at your dash and you’re reading off a lap time or something like that or a pressure for one of the engineers, you can glance back up and have that split second of going, like, ‘Where am I?! How far down the road am I from where I last was?!’. Little things like that, when you lose focus or concentration, it’s a big deal. In the daytime you can relax a bit and let your body take over, but at night you spend a lot of time studying and thinking about what’s coming up, what’s ahead, where’s my braking point and so on. It’s mentally draining.

“You really strain your eyes driving at night, trying to find all the different reference points. In the past for sure I’ve always been squinting, looking, searching out for things. With my Squadra glasses I’ve found that it allows me to relax my eyes a little bit more: I don’t have to strain so much. The details we’re looking for on the road are so small, the reflectors or apexes, or a small bump in the road may be one of our reference points, and the glasses make everything that much more crisp. The yellow tint helps improve contrast just that little bit, and they also have some minor magnification. We’re looking for tenths of a difference here in a race, and the glasses help me keep my focus just that little bit better.”

Focus is the key for driving at Le Mans. Over the last week the teams drove in the most challenging conditions for years, and under the worst possible emotional cloud following the accident. My admiration for top-line drivers has gone up another notch.

Jonathan Moore
Instagram: speedhunters_jonathan
jonathan@speedhunters.com

Other Le Mans stories on Speedhunters
Le Mans: Temple of Speed

Live Timing for all sessions
Radio Le Mans


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28 comments
yanesnyawai
yanesnyawai

Great insight! And thanks for the 'Vettes. Always wanted a proper walpaper.

tbtstt
tbtstt

Fantastic article and great to see some of the unique details on these car, I had no idea they used radar! Is this unique to certain teams/classes, or commonly employed?

DubG
DubG

Nice article ! Could you please put the picture of the Audi overtaking a Corvette as a 1920x1200 desktop usable picture ? That would be awesome !

aussieANON
aussieANON

Is it just me or does this article have a different layout than usual? Black background, white box in the middle with text and photos in?

tomok
tomok

That was a great article! I think many more of the photos are desktop worthy as well.

azmedaj
azmedaj

very informative! fine coverage Jonathan

Jarrod Moore
Jarrod Moore

Brilliant coverage Jonathan, your insight into the team and the technology that goes into the cars was fantastic reading. Looking forward to more. 

Max_Ryde
Max_Ryde

Interesting post! Sadly this year C6's were not good.

You are lucky to cover the race with the full access pass, it's a dream. And I feel ridiculous about pics I took during qualifiying session thursday, when I see yours...

joram
joram

I always wondered if the GTE's and LMP's have traction control and in what amount?

AlexanderLoekkegaard
AlexanderLoekkegaard

Unforgettable race.. 

Ninth victory to Tom Kristensen in what was a great race with close battles and unpredictable weather - all muffled by the loss of Allan Simonsen..

May he rest in peace!

 

Great article as always here on SH, as Paddy says it gives a great insight into how tough Le Mans is!

PaddyMcGrath
PaddyMcGrath moderator

What a fascinating insight into racing at Le Mans, was particularly impressed by the radar system. Thanks Jonathan & Tommy!

Speed_Kiwi
Speed_Kiwi

 @aussieANON

 Same here. Just this article seems to default to the Speedhunters mobile site rather than desktop format.

tbtstt
tbtstt

 @Max_Ryde Haha! I know how you feel! Mananged to get a few shots through the fence which I thought were quite good... then I looked at the Speedhunters coverage and just want to delete the lot!

 

trism
trism

The GTEs do, thats what caused the Aston crash later on in the race, and is thought to be what caused Simonsens crash.

 

If you watch the later crash here http://www.youtube.com/watch?v=uYWEZOtfvW0 you can see that as he gets on the power, the traction control kicks in, you can tell this by the flames spitting out the exhaust pipes.

 

Because he already had opposite lock wound in, as it got traction, it kicks him towards the wall.

 

Compare this with Allans crash, and youll see it looks like a very similar thing happened to him.

sean klingelhoefer
sean klingelhoefer moderator

 @PaddyMcGrath I remember when I first saw the radar system at Sebring, I couldn't believe it. Such an ingenious idea. 

SuzyWallace
SuzyWallace moderator

 @Speed_Kiwi  @aussieANON This is an annoying bug that just seems to occur sometimes on PC/Mac. Is it the same for you in different browsers?

Speed_Kiwi
Speed_Kiwi

 @trism

 Aren't electronic traction control systems supposed to help prevent accidents, rather than contribute to them? Like you say, this looks very similar to the Simonsen crash at the exit of Tertre Rouge. If I was a driver in the Aston team I'm not sure I would have any confidence in the TCS system after seeing the video of both crashes. Confidence in the car is everything.

Speed_Kiwi
Speed_Kiwi

 @sean klingelhoefer  @PaddyMcGrath

Yeah the radar system is really impressive. It seems that a lot of the really nasty multi-car accidents at races like the LM24 are in part caused by the huge speed differential between the different classes. The slower cars never see the faster cars coming and don't have time to get out of the way (e.g. Allan McNish crash in 2012, Pierre Levegh crash in 1955). This radar system has huge safety benefits and I wouldn't be surprised if it was introduced into all GT-E class cars, even the cars that have better rear visibility than the Corvettes.

 

If only somebody would introduce a similar (and also forward-facing) system for high performance road cars which could identify unmarked Police cars and traffic speed cameras........

aussieANON
aussieANON

 @SuzyWallace  @Speed_Kiwi I'm on a PC with Chrome.

 

Alright, this is weird. I reloaded it to look at this comment, and it's back to normal.

 

Speedhunters pls stahp


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